Re: Subject: RE: Subject: Re: Swan Song Photo!
The reason why it works is because with the K-mount, the lens is normally stopped down. You can confirm this by looking through any lens while it is off the camera. The camera has a lever that holds the lens open when it is mounted on the camera. What you do by twisting the lens is disengaging this lever so the lens stops down, so the light meter will then be reading the light coming through at the aperture that the photo will be taken at. This is also a way to get DOF preview on any K-mount body that does not have DOF preview bulit in, like the K1000 or the MZ-5o. This is risky business however, since you need one hand to hold the lens, another to hold the body, and another to turn on the light meter, so don't drop anything! BTW I'm not in the UK, but the in US. It's only 9:32 here, not that late... Hope this helps! Todd At 12:15 PM 3/26/01 +1000, you wrote: >Todd, I am not sure that I am game to try your suggestion...I'll have to >think some more on that one, I don't understand enough technically to know >why that would work, however, I'll take your word for it. Thanks also for >taking the time to try to help this damsel in distress. > >Peter, I see that you understand my confusion here, especially being a past >owner of the exact same lens. > >Even if we don't solve the mystery of making it work on the MZ-50, I guess >we have at least learnt the possible menaing of the "A" in PKA, thanks to >Todd! > >Now please go to bed and sleeep, I'd hate to be the cause of your brain >exploding due to exhaustion! hehe. > >Thanks for your help, I dare say that I will look for your further responses >tonight (Monday) which will then be your Monday morning and you should be >refreshed and ready for me to pick that brain of yours once again! ;-D > >PS Where in the UK are you located? > >Tanya. > > > - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
Subject: RE: Subject: Re: Swan Song Photo!
Todd, I am not sure that I am game to try your suggestion...I'll have to think some more on that one, I don't understand enough technically to know why that would work, however, I'll take your word for it. Thanks also for taking the time to try to help this damsel in distress. Peter, I see that you understand my confusion here, especially being a past owner of the exact same lens. Even if we don't solve the mystery of making it work on the MZ-50, I guess we have at least learnt the possible menaing of the "A" in PKA, thanks to Todd! Now please go to bed and sleeep, I'd hate to be the cause of your brain exploding due to exhaustion! hehe. Thanks for your help, I dare say that I will look for your further responses tonight (Monday) which will then be your Monday morning and you should be refreshed and ready for me to pick that brain of yours once again! ;-D PS Where in the UK are you located? Tanya. - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
Subject: RE: Subject: Re: Swan Song Photo!
Peter wrote: "This is a copy of a post from a few weeks ago - I re-send it because it is relevant to what Todd was saying to Tania about using K mount lenses on an MZ50. Note this is by Erwin Vereecken not myself. I think it's quite clever though. Just thinking of something, > > If you put your M50 f1.7 on your MZ-50, for more then just one occasional > shot, you could do the following: > > Manually select an ISO speed of 2 and 2/3 stops lower then reality (ISO16 > for and ISO100film, ISO 32 for a 200film, etc..) > > With the camera on manual, the light meter will now show you > which diaphragm > to select. The middle of the meter range will be f4.0, one higher > f5.6, one > lower f2.8 etc, all the way from f1.4(which you don't have) to f11, > including the half stops. > > Should work fairly quick, withouth calculations. > > There is a theoretical 1/6 stop overexposure, but that should'nt have a > visible influence on the result. If you think your camera has a > tendency to > overexpose anyway, lower ISO speed by 2 and 1/3 stop, that will give a > theoretical underexposure of 1/6 stop. > > It's not real easy, because if you would have several manual lenses, you > would have to change ISO everytime you change lens, f.i. for a f2.8, lens > ISO would have to be lowered 1 stop to keep f4 in the midle, and if you > mount an automatic lens in between, you shouldn't forget to put > ISO back to > nominal." Peter thanks for your attempt to help me here, but I have only one thing to say "wwooosh!" That all just went straight over my head! Well, not really, but I am sitting here trying what Erwin suggests and I can't for rhe life of me get my meter to do anything but flash at me in any other mode except tv - no matter what ISO I set it at. I have a T400CN loaded at the moment and I am clueless here! I did notice however that you mentioned that this is for "K" mount lenses; the lens I am using is a Tamron with PKA adaptall, would this make any difference? Thanks in advance. Tanya. - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
