Re: 100/2.8 Macro Issue - Thoughts?
> That "--" readout is normal. What is slightingly referred to as the > "crippled K-mount" on all the DSLRs doesn't have the aperture follower > linkage, so there is no way for the body to know what the aperture ring > on the lens is set to (other than the separate "A" position detection). > > It still sounds to me like a purely mechanical problem. > > Normally, when a lens is off the camera, it will be stopped down to > the aperture set on the aperture ring (or f/32 for the "A" position). > As you rotate the lens while mounting it on your camera the mechanical > aperture linkage between the body and the lens is supposed to engage, > and this will open the iris up to maximum aperture. > > It sounds to me as though this is not happening when you have the > lens set to "A". If (after the lens is mounted on the body) you > then turn the aperture ring to f/2.8 and back to "A" again this > will give the two parts of the mechanical linkage another chance > to mate properly. It sounds as though doing this is enough to > get your lens working correctly again. > > Take a look at the aperture linkage on your lens, and compare it > to the lever on any other lens. It should stick straight out > parallel to the axis of the lens. If the tip of the lever (the > part that sticks out the furthest) is bent inwards towards the > axis of the lens it's possible that the very slight flex in the > lens that you introduce while mounting it causes it to just miss > engaging with the body (or, alternatively, it's possible that > the lens itself tilts the lever slightly when the aperture ring > is all the way round to the "A" position). Turning the lens > aperture ring to f/2.8 after the lens is mounted forces the link > back to the correct side of the body coupler, whereupon normal > operation should resume. > > If the lens always works normally if you have the aperture set > to f/2.8 when you mount it I'd suggest simply doing that, and > only turning the aperture ring to "A" after the lens is mounted. > > Failing that, I'd consider trying to bend that lever very slightly > so that the tip of it moved fractionally further away from the > axis of the lens, but I'd only do that if the workaround failed. > > Has the lens ever been dropped, as far as you know? That can > bend that lever if you're unlucky enough to have that be the > first part of the lens to come into contact with something hard > (and that will push the tip of the lever towards the lens axis). Thanks John. That was useful and instructional as well. As far as I know, no, it hasn't been dropped. I've had it since 98/99 though. I'm thinking your analysis is right on. I sense a very slight 'binding', when I mount/dismount the lens. Tom C. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
Eric Hendrickson in Sharps Chapel(?), TN is good, a former Pentax technician, and very reasonable. (He retired from Chicago.) He is also known as 'Pentax Repair'. See here http://pentaxs.com/ Regards, Bob S. On Fri, May 4, 2012 at 6:10 PM, John Sessoms wrote: > From: Tom C > >> This may be going in for repair. Does anyone know if Pentax will still >> repair an FA 100/2.8 Macro? >> >> Tom C. > > > If they won't someone has favorably mentioned a shop somewhere in New Jersey > a couple times. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and > follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
From: Tom C This may be going in for repair. Does anyone know if Pentax will still repair an FA 100/2.8 Macro? Tom C. If they won't someone has favorably mentioned a shop somewhere in New Jersey a couple times. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
On Fri, May 04, 2012 at 12:29:25PM -0600, Tom C wrote: > > Other information as I've experimented. > > If I leave the lens in a non-A setting, and remove it from the camera > and put it back on, operation is fine. > > If I set the lens to the 'A' setting and remount it, the symptoms > recur (darkish viewfinder and inability to focus). At this point if I > go off of 'A' setting to manual aperture, it continues to NOT achieve > focus at every aperture, until I reach the click between f/11 and f/8, > at which times it focuses. It does this fairly consistently. > > If I immediately rotate the aperture ring from the click between f/8 > and f/11, to a smaller aperture, f/22 for instance it again DOES NOT > focus and the viewfinder is darkish. > > If I have the lens in 'A' when I mount it on the camera, immediately > dial down to f/2.8, and then up through all the aperture settings > including 'A' it focuses fine. > > So I'm guessing there is something electro-mechanical in nature going > on with the aperture-ring? > > Also, I've never noticed this before, but when in non-A mode I don't > see an aperture readout in the viewfinder or top-panel. Just --. May > be that's normal and I never saw it before. That "--" readout is normal. What is slightingly referred to as the "crippled K-mount" on all the DSLRs doesn't have the aperture follower linkage, so there is no way for the body to know what the aperture ring on the lens is set to (other than the separate "A" position detection). It still sounds to me like a purely mechanical problem. Normally, when a lens is off the camera, it will be stopped down to the aperture set on the aperture ring (or f/32 for the "A" position). As you rotate the lens while mounting it on your camera the mechanical aperture linkage between the body and the lens is supposed to engage, and this will open the iris up to maximum aperture. It sounds to me as though this is not happening when you have the lens set to "A". If (after the lens is mounted on the body) you then turn the aperture ring to f/2.8 and back to "A" again this will give the two parts of the mechanical linkage another chance to mate properly. It sounds as though doing this is enough to get your lens working correctly again. Take a look at the aperture linkage on your lens, and compare it to the lever on any other lens. It should stick straight out parallel to the axis of the lens. If the tip of the lever (the part that sticks out the furthest) is bent inwards towards the axis of the lens it's possible that the very slight flex in the lens that you introduce while mounting it causes it to just miss engaging with the body (or, alternatively, it's possible that the lens itself tilts the lever slightly when the aperture ring is all the way round to the "A" position). Turning the lens aperture ring to f/2.8 after the lens is mounted forces the link back to the correct side of the body coupler, whereupon normal operation should resume. If the lens always works normally if you have the aperture set to f/2.8 when you mount it I'd suggest simply doing that, and only turning the aperture ring to "A" after the lens is mounted. Failing that, I'd consider trying to bend that lever very slightly so that the tip of it moved fractionally further away from the axis of the lens, but I'd only do that if the workaround failed. Has the lens ever been dropped, as far as you know? That can bend that lever if you're unlucky enough to have that be the first part of the lens to come into contact with something hard (and that will push the tip of the lever towards the lens axis). -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
> On Fri, May 4, 2012 at 8:33 AM, Tom C wrote: >>> Tom, >>> Just bend it back 1 or 2 mm's then check again. >>> You're probably just hanging up a bit on the sides. >>> Regards, ?Bob S. >> >> Thanks Bob. >> >> If I break it I'll send it to Larry. :) >> >> Tom C. Well I bent the aperture lever back away using just my thumb with enough pressure so that now it doesn't visibly stick anymore. I also cleaned both lens and camera contacts with an eraser. End result? No change in behavior. Other information as I've experimented. If I leave the lens in a non-A setting, and remove it from the camera and put it back on, operation is fine. If I set the lens to the 'A' setting and remount it, the symptoms recur (darkish viewfinder and inability to focus). At this point if I go off of 'A' setting to manual aperture, it continues to NOT achieve focus at every aperture, until I reach the click between f/11 and f/8, at which times it focuses. It does this fairly consistently. If I immediately rotate the aperture ring from the click between f/8 and f/11, to a smaller aperture, f/22 for instance it again DOES NOT focus and the viewfinder is darkish. If I have the lens in 'A' when I mount it on the camera, immediately dial down to f/2.8, and then up through all the aperture settings including 'A' it focuses fine. So I'm guessing there is something electro-mechanical in nature going on with the aperture-ring? Also, I've never noticed this before, but when in non-A mode I don't see an aperture readout in the viewfinder or top-panel. Just --. May be that's normal and I never saw it before. Thanks. This may be going in for repair. Does anyone know if Pentax will still repair an FA 100/2.8 Macro? Tom C. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
First thing to try in any of these errors that might be caused by a "communication problem" between the lens and the camera is to clean the contacts on both the body and the lens. A clean pencil eraser has been recommended (and used successfully by me in the past). You should not rub hard enough that any of the eraser actually comes OFF, but if any does just blow it off. Perhaps fast-evaporating Eclipse cleaner (like is used on sensor cleaning operations) would be another option. I doubt that it is mechanical at all. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
If you break it, you can send it to Eric for repair... On Fri, May 4, 2012 at 8:33 AM, Tom C wrote: >> Tom, >> Just bend it back 1 or 2 mm's then check again. >> You're probably just hanging up a bit on the sides. >> Regards, Bob S. > > Thanks Bob. > > If I break it I'll send it to Larry. :) > > Tom C. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
> Tom, > Just bend it back 1 or 2 mm's then check again. > You're probably just hanging up a bit on the sides. > Regards, Bob S. Thanks Bob. If I break it I'll send it to Larry. :) Tom C. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
You can try bending it back into place yourself, or try sending it to someone for repair. I've had good luck and bad luck with both options. On 5/3/2012 4:19 PM, Tom C wrote: Yep, when you mount the lens and the viewfinder is dark, then your aperture lever isn't aligning with the body...probably bent. Regards, Bob S. On Fri, Apr 27, 2012 at 8:12 PM, John Francis wrote: On Fri, Apr 27, 2012 at 04:34:57PM -0600, Tom C wrote: Yeah that was stupid of me. It's the tank-artillery-shell-bodied FA/100 2.8 Macro. It seems to be related to the aperture lever/control on the lens. It appears through the viewfinder that it's totally stopped down in 'A' mode, even when the camera body says f/2.8, f/4, etc. That's a problem right there. The lens should only be stopped down during exposure (or when the DOF preview is in effect). ?If the viewfinder is dark at other times something (almost certainly the lens) is misbehaving. Check to make sure the mechanical coupling in the lens moves freely, springs back quickly, and isn't bent so that it would come into contact with anything on the body except for the aperture stopdown linkage. Check that the linkage on the body isn't bent, either - it's possible that it might be getting caught up on some part of the lens. Belated thanks John and Bob. The aperture lever does seem to be slightly bent, inward towards the center of the image circle. I can pull it down, let go, and it springs back. However, if I slowly pull it down firmly and take my finger off, it sometimes sticks in place. This is no doubt the issue. Is this an easy fix? Inexpensive fix? Thanks. Tom -- Don't lose heart! They might want to cut it out, and they'll want to avoid a lengthily search. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
Tom, Just bend it back 1 or 2 mm's then check again. You're probably just hanging up a bit on the sides. Regards, Bob S. On Thu, May 3, 2012 at 3:19 PM, Tom C wrote: >> Yep, when you mount the lens and the viewfinder is dark, >> then your aperture lever isn't aligning with the body...probably bent. >> Regards, Bob S. >> >> On Fri, Apr 27, 2012 at 8:12 PM, John Francis wrote: >>> On Fri, Apr 27, 2012 at 04:34:57PM -0600, Tom C wrote: Yeah that was stupid of me. It's the tank-artillery-shell-bodied FA/100 2.8 Macro. It seems to be related to the aperture lever/control on the lens. It appears through the viewfinder that it's totally stopped down in 'A' mode, even when the camera body says f/2.8, f/4, etc. >>> >>> That's a problem right there. >>> >>> The lens should only be stopped down during exposure (or when the >>> DOF preview is in effect). ?If the viewfinder is dark at other times >>> something (almost certainly the lens) is misbehaving. >>> >>> Check to make sure the mechanical coupling in the lens moves freely, >>> springs back quickly, and isn't bent so that it would come into contact >>> with anything on the body except for the aperture stopdown linkage. >>> >>> Check that the linkage on the body isn't bent, either - it's possible >>> that it might be getting caught up on some part of the lens. > > Belated thanks John and Bob. The aperture lever does seem to be > slightly bent, inward towards the center of the image circle. I can > pull it down, let go, and it springs back. However, if I slowly pull > it down firmly and take my finger off, it sometimes sticks in place. > > This is no doubt the issue. > > Is this an easy fix? Inexpensive fix? > > Thanks. > > Tom > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
On May 3, 2012, at 1:19 PM, Tom C wrote: > > Belated thanks John and Bob. The aperture lever does seem to be > slightly bent, inward towards the center of the image circle. I can > pull it down, let go, and it springs back. However, if I slowly pull > it down firmly and take my finger off, it sometimes sticks in place. > > This is no doubt the issue. > > Is this an easy fix? Inexpensive fix? It's probably totally ruined, just send it to me, I'll give you $10 for the lens, I'm sure I can find a use for it. :-) -- Larry Colen l...@red4est.com sent from i4est -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
> Yep, when you mount the lens and the viewfinder is dark, > then your aperture lever isn't aligning with the body...probably bent. > Regards, Bob S. > > On Fri, Apr 27, 2012 at 8:12 PM, John Francis wrote: >> On Fri, Apr 27, 2012 at 04:34:57PM -0600, Tom C wrote: >>> >>> Yeah that was stupid of me. It's the tank-artillery-shell-bodied >>> FA/100 2.8 Macro. >>> >>> It seems to be related to the aperture lever/control on the lens. It >>> appears through the viewfinder that it's totally stopped down in 'A' >>> mode, even when the camera body says f/2.8, f/4, etc. >> >> That's a problem right there. >> >> The lens should only be stopped down during exposure (or when the >> DOF preview is in effect). ?If the viewfinder is dark at other times >> something (almost certainly the lens) is misbehaving. >> >> Check to make sure the mechanical coupling in the lens moves freely, >> springs back quickly, and isn't bent so that it would come into contact >> with anything on the body except for the aperture stopdown linkage. >> >> Check that the linkage on the body isn't bent, either - it's possible >> that it might be getting caught up on some part of the lens. Belated thanks John and Bob. The aperture lever does seem to be slightly bent, inward towards the center of the image circle. I can pull it down, let go, and it springs back. However, if I slowly pull it down firmly and take my finger off, it sometimes sticks in place. This is no doubt the issue. Is this an easy fix? Inexpensive fix? Thanks. Tom -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
Gremlins. On 4/27/2012 5:13 PM, Tom C wrote: I've started having problems with this lens that are weird. I don't think it's operator error... It didn't want to AF last time I had it on (was using more as a telephoto). I just mounted it again, and had the same issue. It seems to hunt a bit but does not achieve focus and stops. It was on the 'A' setting and the view through the viewfinder was very dark. I turned the aperture ring to 2.8 and voila it focuses. I then returned it to 'A' and it focuses with no problem, as it always has, regardless of what I set aperture to via the body. However, if I take the lens off the camera, and put it back on, it's behavior goes to as stated earlier, it doesn't want to focus. I've repeated this half a dozen time and it's the same each time I try it. Idea's? Tom C. -- Don't lose heart! They might want to cut it out, and they'll want to avoid a lengthily search. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
Yep, when you mount the lens and the viewfinder is dark, then your aperture lever isn't aligning with the body...probably bent. Regards, Bob S. On Fri, Apr 27, 2012 at 8:12 PM, John Francis wrote: > On Fri, Apr 27, 2012 at 04:34:57PM -0600, Tom C wrote: >> >> Yeah that was stupid of me. It's the tank-artillery-shell-bodied >> FA/100 2.8 Macro. >> >> It seems to be related to the aperture lever/control on the lens. It >> appears through the viewfinder that it's totally stopped down in 'A' >> mode, even when the camera body says f/2.8, f/4, etc. > > That's a problem right there. > > The lens should only be stopped down during exposure (or when the > DOF preview is in effect). If the viewfinder is dark at other times > something (almost certainly the lens) is misbehaving. > > Check to make sure the mechanical coupling in the lens moves freely, > springs back quickly, and isn't bent so that it would come into contact > with anything on the body except for the aperture stopdown linkage. > > Check that the linkage on the body isn't bent, either - it's possible > that it might be getting caught up on some part of the lens. > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
On Fri, Apr 27, 2012 at 04:34:57PM -0600, Tom C wrote: > > Yeah that was stupid of me. It's the tank-artillery-shell-bodied > FA/100 2.8 Macro. > > It seems to be related to the aperture lever/control on the lens. It > appears through the viewfinder that it's totally stopped down in 'A' > mode, even when the camera body says f/2.8, f/4, etc. That's a problem right there. The lens should only be stopped down during exposure (or when the DOF preview is in effect). If the viewfinder is dark at other times something (almost certainly the lens) is misbehaving. Check to make sure the mechanical coupling in the lens moves freely, springs back quickly, and isn't bent so that it would come into contact with anything on the body except for the aperture stopdown linkage. Check that the linkage on the body isn't bent, either - it's possible that it might be getting caught up on some part of the lens. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
On 4/27/2012 5:13 PM, Tom C wrote: I've started having problems with this lens that are weird. I don't think it's operator error... It didn't want to AF last time I had it on (was using more as a telephoto). I just mounted it again, and had the same issue. It seems to hunt a bit but does not achieve focus and stops. It was on the 'A' setting and the view through the viewfinder was very dark. I turned the aperture ring to 2.8 and voila it focuses. I then returned it to 'A' and it focuses with no problem, as it always has, regardless of what I set aperture to via the body. If you can replicate the problem with the dark screen - have you looked through the front of the lens to see if the aperture is fully open? Are the exposures accurate? Could the aperture be sticking, causing AF problems and the darker finder? (It would cause over exposure problems as well.) MCC -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
I had an A* 300 f/2.8 that had a problem with the aperture cam/lever control/or? sticking wide open. Got some terrible over exposures. Send it to Pentax for repair. When I got it back, I gave it a try by hand before mounting it and it stuck. Tried it several more times and it did not stick again. Used it for several years after that and had no problem. At least I had no problem images tell me so. Have you tried working that aperture linkage by hand to check if it's working freely? Jack - Original Message - From: Tom C To: pdml@pdml.net Cc: Sent: Friday, April 27, 2012 3:34 PM Subject: Re: 100/2.8 Macro Issue - Thoughts? > You don't say if you are using the F, FA, DA or DA WR version. My > FA100 will sometimes refuse to get a focus lock and sit at infinity. > I press in the mount lock button to release the AF drive and manually > focus to approximate focus and it then seems to work ok till the next > time it decides it can't focus on what I'm asking it to look at and I > do the same thing. It's done it on all the digital cameras I've owned > *istD, K10, K7 and K5. I can't remember it doing it on the MZ-S, but > that doesn't mean it didn't. > > I don't know if this helps you or not. I don't use it much now days > and usually only on manual focus as I have the DA WR version for field > work (smaller and weather resistant is good when knee deep in sea > water). > > Leon Yeah that was stupid of me. It's the tank-artillery-shell-bodied FA/100 2.8 Macro. It seems to be related to the aperture lever/control on the lens. It appears through the viewfinder that it's totally stopped down in 'A' mode, even when the camera body says f/2.8, f/4, etc. Setting the lens manually to a big aperture allows it to AF (viewfinder brightens), then resetting it to 'A' mode, viewfinder continues to appear bright and AF continues to work. Take the lens off the body, put it back on, same issue repeats. Thanks Leon, et al. > >> On Apr 27, 2012, at 4:13 PM, Tom C wrote: >> >>> I've started having problems with this lens that are weird. I don't >>> think it's operator error... >>> >>> It didn't want to AF last time I had it on (was using more as a >>> telephoto). I just mounted it again, and had the same issue. It seems >>> to hunt a bit but does not achieve focus and stops. >>> >>> It was on the 'A' setting and the view through the viewfinder was very >>> dark. I turned the aperture ring to 2.8 and voila it focuses. I then >>> returned it to 'A' and it focuses with no problem, as it always has, >>> regardless of what I set aperture to via the body. >>> >>> However, if I take the lens off the camera, and put it back on, it's >>> behavior goes to as stated earlier, it doesn't want to focus. I've >>> repeated this half a dozen time and it's the same each time I try it. >>> >>> Idea's? >>> >>> Tom C. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
> You don't say if you are using the F, FA, DA or DA WR version. My > FA100 will sometimes refuse to get a focus lock and sit at infinity. > I press in the mount lock button to release the AF drive and manually > focus to approximate focus and it then seems to work ok till the next > time it decides it can't focus on what I'm asking it to look at and I > do the same thing. It's done it on all the digital cameras I've owned > *istD, K10, K7 and K5. I can't remember it doing it on the MZ-S, but > that doesn't mean it didn't. > > I don't know if this helps you or not. I don't use it much now days > and usually only on manual focus as I have the DA WR version for field > work (smaller and weather resistant is good when knee deep in sea > water). > > Leon Yeah that was stupid of me. It's the tank-artillery-shell-bodied FA/100 2.8 Macro. It seems to be related to the aperture lever/control on the lens. It appears through the viewfinder that it's totally stopped down in 'A' mode, even when the camera body says f/2.8, f/4, etc. Setting the lens manually to a big aperture allows it to AF (viewfinder brightens), then resetting it to 'A' mode, viewfinder continues to appear bright and AF continues to work. Take the lens off the body, put it back on, same issue repeats. Thanks Leon, et al. > >> On Apr 27, 2012, at 4:13 PM, Tom C wrote: >> >>> I've started having problems with this lens that are weird. I don't >>> think it's operator error... >>> >>> It didn't want to AF last time I had it on (was using more as a >>> telephoto). I just mounted it again, and had the same issue. It seems >>> to hunt a bit but does not achieve focus and stops. >>> >>> It was on the 'A' setting and the view through the viewfinder was very >>> dark. I turned the aperture ring to 2.8 and voila it focuses. I then >>> returned it to 'A' and it focuses with no problem, as it always has, >>> regardless of what I set aperture to via the body. >>> >>> However, if I take the lens off the camera, and put it back on, it's >>> behavior goes to as stated earlier, it doesn't want to focus. I've >>> repeated this half a dozen time and it's the same each time I try it. >>> >>> Idea's? >>> >>> Tom C. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
You don't say if you are using the F, FA, DA or DA WR version. My FA100 will sometimes refuse to get a focus lock and sit at infinity. I press in the mount lock button to release the AF drive and manually focus to approximate focus and it then seems to work ok till the next time it decides it can't focus on what I'm asking it to look at and I do the same thing. It's done it on all the digital cameras I've owned *istD, K10, K7 and K5. I can't remember it doing it on the MZ-S, but that doesn't mean it didn't. I don't know if this helps you or not. I don't use it much now days and usually only on manual focus as I have the DA WR version for field work (smaller and weather resistant is good when knee deep in sea water). Leon > On Apr 27, 2012, at 4:13 PM, Tom C wrote: > >> I've started having problems with this lens that are weird. I don't >> think it's operator error... >> >> It didn't want to AF last time I had it on (was using more as a >> telephoto). I just mounted it again, and had the same issue. It seems >> to hunt a bit but does not achieve focus and stops. >> >> It was on the 'A' setting and the view through the viewfinder was very >> dark. I turned the aperture ring to 2.8 and voila it focuses. I then >> returned it to 'A' and it focuses with no problem, as it always has, >> regardless of what I set aperture to via the body. >> >> However, if I take the lens off the camera, and put it back on, it's >> behavior goes to as stated earlier, it doesn't want to focus. I've >> repeated this half a dozen time and it's the same each time I try it. >> >> Idea's? >> >> Tom C. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
I run into operator error sometimes when I lock the focus inadvertantly when I take the lens on and off. Regards, Bob S. On Fri, Apr 27, 2012 at 4:13 PM, Tom C wrote: > I've started having problems with this lens that are weird. I don't > think it's operator error... > > It didn't want to AF last time I had it on (was using more as a > telephoto). I just mounted it again, and had the same issue. It seems > to hunt a bit but does not achieve focus and stops. > > It was on the 'A' setting and the view through the viewfinder was very > dark. I turned the aperture ring to 2.8 and voila it focuses. I then > returned it to 'A' and it focuses with no problem, as it always has, > regardless of what I set aperture to via the body. > > However, if I take the lens off the camera, and put it back on, it's > behavior goes to as stated earlier, it doesn't want to focus. I've > repeated this half a dozen time and it's the same each time I try it. > > Idea's? > > Tom C. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: 100/2.8 Macro Issue - Thoughts?
My is seriously prone to search wildly for focus when I'm shooting close objects. Jeffery On Apr 27, 2012, at 4:13 PM, Tom C wrote: > I've started having problems with this lens that are weird. I don't > think it's operator error... > > It didn't want to AF last time I had it on (was using more as a > telephoto). I just mounted it again, and had the same issue. It seems > to hunt a bit but does not achieve focus and stops. > > It was on the 'A' setting and the view through the viewfinder was very > dark. I turned the aperture ring to 2.8 and voila it focuses. I then > returned it to 'A' and it focuses with no problem, as it always has, > regardless of what I set aperture to via the body. > > However, if I take the lens off the camera, and put it back on, it's > behavior goes to as stated earlier, it doesn't want to focus. I've > repeated this half a dozen time and it's the same each time I try it. > > Idea's? > > Tom C. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
