Re: Tamron P/KA adapter
Go from a D to a Ds to a K20 regularly and you'll go slightly crazy. Once you get used to one everything is in the wrong place on the others. I expect to get a K-5 in about a year, and use the K20 as a backup, that should be loads of fun. At least on the Ds the e-wheel is in the same place as the back wheel on the K20. On 12/28/2010 10:11 AM, Barry Rice wrote: Hey Boris, Brian, OK, now I'm a bit red in the face---you're right---green button method in manual mode works just fine with the P/K adapter. So even if I can't get a pair of reliable P/KA adapters I can use the P/K adapter. OK, in my defense I just recently upgraded from a K10 to a K7 body, and the green button position moved on these two bodies. I must have been stupidly hitting the wrong button when I was trying to get the lens to work with the adapter. THANKS SO MUCH! Barry Rice, Ph.D. Carnivorous Plant FAQ sarracenia.com -- Where's the Kaboom? There was supposed to be an Earth-shattering Kaboom! --Marvin the Martian. -- 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: Tamron P/KA adapter
On Dec 28, 2010, at 0:05, Barry Rice wrote: Hey Pentaxians I do my macro work using a Tamron 90mm 1:1 F2.8 macro, which is a generic lens that sits on a Pentax P/KA mount. Unfortunately, the lens is starting to act erratically and I've figured out that it is because of the adaptall mount. If you haven't tried this already, completely remove, clean, and re-mount the Adaptall mount. It took me about 10 attempts to figure out just how it attaches and interacts with the camera, but last time I had the no f-stop data sent to the camera issue with my Tamron 90mm f/2.5 macro lens, removing that mount and reattaching it made everything alright (for now). -Charles -- Charles Robinson - charl...@visi.com Minneapolis, MN http://charles.robinsontwins.org http://www.facebook.com/charles.robinson -- 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.
Tamron P/KA adapter
Hey Boris, Brian, OK, now I'm a bit red in the face---you're right---green button method in manual mode works just fine with the P/K adapter. So even if I can't get a pair of reliable P/KA adapters I can use the P/K adapter. OK, in my defense I just recently upgraded from a K10 to a K7 body, and the green button position moved on these two bodies. I must have been stupidly hitting the wrong button when I was trying to get the lens to work with the adapter. THANKS SO MUCH! Barry Rice, Ph.D. Carnivorous Plant FAQ sarracenia.com -- 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: Tamron P/KA adapter
You're welcome, Barry. No need to be red in the face really. Glad to help. Boris On 12/28/2010 5:11 PM, Barry Rice wrote: Hey Boris, Brian, OK, now I'm a bit red in the face---you're right---green button method in manual mode works just fine with the P/K adapter. So even if I can't get a pair of reliable P/KA adapters I can use the P/K adapter. OK, in my defense I just recently upgraded from a K10 to a K7 body, and the green button position moved on these two bodies. I must have been stupidly hitting the wrong button when I was trying to get the lens to work with the adapter. THANKS SO MUCH! Barry Rice, Ph.D. Carnivorous Plant FAQ sarracenia.com -- 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.
Tamron P/KA adapter
Hey Pentaxians I do my macro work using a Tamron 90mm 1:1 F2.8 macro, which is a generic lens that sits on a Pentax P/KA mount. Unfortunately, the lens is starting to act erratically and I've figured out that it is because of the adaptall mount. Unfortunately, I've discovered that the Pentax adaptall mount for automatic lenses are no longer being made, rumour has it they were unreliable, although my mount lasted for about 12 years. The regular Pentax P/K mount is useless for this lens (I know, I have one.) I've seen references to some other kind of mount, M42 or something like that. Can someone 'splain to me if this is something I can use to bring my extremely cherished 90mm back to life? I think it is a generic mount that needs some kind of Pentax add-on? Cheers Barry Barry Rice, Ph.D. Carnivorous Plant FAQ sarracenia.com -- 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: Tamron P/KA adapter
Barry, few years ago I had Tamron 90/2.5 macro (older one) with PK-A Adaptall adapter. It worked just fine only occasionally having electric contact problems due to minute mechanical shift of a lens w.r.t. adapter. I am thinking that you could find yourself another such adapter (PK-A) on eBay or other venues that offer second hand gear and in principle it might solve your problem. I did not find this little issue anything more than a minor nuisance at the time. Sold the lens only because I wanted to buy significantly more expensive FA 31/1.8 Limited and had no money available... Boris On 12/28/2010 8:05 AM, Barry Rice wrote: Hey Pentaxians I do my macro work using a Tamron 90mm 1:1 F2.8 macro, which is a generic lens that sits on a Pentax P/KA mount. Unfortunately, the lens is starting to act erratically and I've figured out that it is because of the adaptall mount. Unfortunately, I've discovered that the Pentax adaptall mount for automatic lenses are no longer being made, rumour has it they were unreliable, although my mount lasted for about 12 years. The regular Pentax P/K mount is useless for this lens (I know, I have one.) I've seen references to some other kind of mount, M42 or something like that. Can someone 'splain to me if this is something I can use to bring my extremely cherished 90mm back to life? I think it is a generic mount that needs some kind of Pentax add-on? Cheers Barry Barry Rice, Ph.D. Carnivorous Plant FAQ sarracenia.com -- 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.
Tamron P/KA adapter
Hey Boris OK, some more back story. I love my 90mm so much, that about 8 years ago I bought a second one for the day that something happened to my first one. I even bought an adaptall for it, but for some damnable reason I didn't assemble the two to make sure they worked. (I know what you're thinking--this is the exact same reason the problem with the Hubble Space Telescope wasn't noticed until after launch.) It turns out the adaptall that I bought was just a P/K, and not a P/KA. So, now I'm in the market for TWO adapters. I just bought one on eBay--it is supposedly coming my way from the UK. But I'm wondering if there's a new technology--that's the source of my curiosity regarding the M43 mount. Barry Rice, Ph.D. Carnivorous Plant FAQ sarracenia.com -- 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: Tamron P/KA adapter
On Tue, 28 Dec 2010 08:21 +0200, Boris Liberman bori...@gmail.com wrote: Barry, few years ago I had Tamron 90/2.5 macro (older one) with PK-A Adaptall adapter. It worked just fine only occasionally having electric contact problems due to minute mechanical shift of a lens w.r.t. adapter. I am thinking that you could find yourself another such adapter (PK-A) on eBay or other venues that offer second hand gear and in principle it might solve your problem. I did not find this little issue anything more than a minor nuisance at the time. Sold the lens only because I wanted to buy significantly more expensive FA 31/1.8 Limited and had no money available... My experience is much the same. I have a Tamron 90mm/2.5 with an adaptall KA mount. Whenever the mount stops sending info to the camera, I find just trying to turn the lens slightly clockwise/anti-clockwise re-establishes contact (it only moves fractionally). You can find these adapters on EBay but they tend to be a bit pricey these days - you may have to pay $70 to $100 for one (second hand). I'm a bit confused when you say you can't use a normal PK adaptall mount. Are you using the lens on a DSLR? - because the lens with PK mount should work in the same way as any pre-A series K mount, using the green button method in Manual mode. Before I got a KA adaptall mount I used a normal PK mount on the lens very successfully. I just tried it again and it works fine. You can get a M42 adaptall mount for the lens and use it with the Pentax M42/K adapter but I don't see how that would be a better solution than the PK adapter. Cheers Brian ++ Brian Walters Western Sydney Australia http://lyons-ryan.org/southernlight/ On 12/28/2010 8:05 AM, Barry Rice wrote: Hey Pentaxians I do my macro work using a Tamron 90mm 1:1 F2.8 macro, which is a generic lens that sits on a Pentax P/KA mount. Unfortunately, the lens is starting to act erratically and I've figured out that it is because of the adaptall mount. Unfortunately, I've discovered that the Pentax adaptall mount for automatic lenses are no longer being made, rumour has it they were unreliable, although my mount lasted for about 12 years. The regular Pentax P/K mount is useless for this lens (I know, I have one.) I've seen references to some other kind of mount, M42 or something like that. Can someone 'splain to me if this is something I can use to bring my extremely cherished 90mm back to life? I think it is a generic mount that needs some kind of Pentax add-on? Cheers Barry Barry Rice, Ph.D. Carnivorous Plant FAQ sarracenia.com -- -- http://www.fastmail.fm - The way an email service should be -- 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: Tamron P/KA adapter
Barry, all Pentax DSLRs allow stop-down metering with K and M lenses. P/K adapter falls in that category. Depending on your camera you may have to consult user manual for specifics. Therefore, in principle P/K adapter is good for you. Personally, I found metering of /my/ K10D in stop-down mode rather unreliable and opted not to have any pre KA-mount lenses. Thus, I haven't had a chance to try K-7 with this regard. I don't know of there is adaptall m43 (I take it you refer to micro 4/3 system here) adapter, but there might be and surely it is worth the try. Theoretically, it is known that K-m43 adapter does exist and you may want to mount your adaptall lens with P/KA adapter on K-m43 adapter for use with m43 bodies. Theoretically it could work. But I haven't tried it 'cause I've no m43 cameras. May be Godfrey and others on the list who have these cameras can give more useful insight. Boris On 12/28/2010 8:31 AM, Barry Rice wrote: Hey Boris OK, some more back story. I love my 90mm so much, that about 8 years ago I bought a second one for the day that something happened to my first one. I even bought an adaptall for it, but for some damnable reason I didn't assemble the two to make sure they worked. (I know what you're thinking--this is the exact same reason the problem with the Hubble Space Telescope wasn't noticed until after launch.) It turns out the adaptall that I bought was just a P/K, and not a P/KA. So, now I'm in the market for TWO adapters. I just bought one on eBay--it is supposedly coming my way from the UK. But I'm wondering if there's a new technology--that's the source of my curiosity regarding the M43 mount. Barry Rice, Ph.D. Carnivorous Plant FAQ sarracenia.com -- 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.
