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04-06-2007, 12:50 PM   #1
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M42 lenses on K100D

From my old film camera I have three M42 lenses
- ASAHI PENTAX Super - Multi - Coated TAKUMAR 1:2.8/105
- FLEKTOGON auto 2.4/35 MC, CARL ZEISS JENA
- PENTACON auto 4/200MC, former Meyer Orestegor
I already have the adapter M42-K mount.
I would be very grateful for any piece of advice regarding the operation/practice with these lenses on K100D. Difficulties, settings, lessons to learn, .....
Thank you!
Andrei

04-06-2007, 01:12 PM   #2
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use in M mode, the same as all MF lenses apart from the fact that the viewfinder gets darker too as you stop down...

from my point of view - easy, great lenses, they don't build them like this anymore
04-06-2007, 05:24 PM   #3
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Wow, great lenses! I usually keep the camera on Av mode rather than manually stopping down (using the AE-L button) in M, but for some reason it always underexposes by a good 1.5-2 stops when I do that. Weird.

M42 lenses work GREAT on the K100D, by the way!
04-07-2007, 04:38 AM   #4
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I use old Takumar lenses almost exclusively and, like Finn, I shoot in Av mode and find that they all require me to give a +1/5 EV boost via the +/- button. That's the same on my 55mm, 105mm, 135mm, and 200mm.

04-07-2007, 07:24 AM   #5
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QuoteOriginally posted by Zubati Kit Quote
use in M mode, the same as all MF lenses apart from the fact that the viewfinder gets darker too as you stop down...

from my point of view - easy, great lenses, they don't build them like this anymore
Why shoot in M mode? Since you're stopping the lens down, you can shoot in Av mode without pause.

The only lenses that you need to shoot in M mode are the old bayonet lenses without an 'A' position on the aperture ring. (The K- and M-series Pentax lenses, for example.)
04-07-2007, 08:19 AM   #6
clm
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M42 lenses are easier to use than K- or M-series lenses. Set lens to manual aperture and camera to Av. Focus, set aperture, shoot. Metering is automatic(if you want it to be).
04-08-2007, 09:02 AM   #7
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Original Poster
Thanks

Thanks to all of you!
I am open to any other opinion/experience ragarding Flektogon/Orestegon/Takumar lenses used on K100D.
Happy Easter to everybody!
Andrei
05-14-2007, 07:45 AM   #8
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Will Zeiss Tessar 50mm2.8 fit a pentax?

Hi! Does anyone know if the above lens with "Contaflex Synchro-compur-x" written on it fit any pentax K mount cam?

Thanks

Tasha

05-14-2007, 11:35 AM   #9
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That sounds like a lens for a rangefinder camera, with a built-in flash-synchronized Compur leaf shutter.
05-14-2007, 11:09 PM   #10
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I have Pentacon 135/2.8 and 200/4 m42 lenses. They are both great. I am using them on Av as well and with exposure compensation of +1.5 as other users.

135/2.8 is much easier to focus then 200/4, probably because of the more contrast image and brighter 2.8 aperture.
I am mostly using them wide open (concerts in low light). Great sharpness even then and exceptional bokeh, which could only exist on fixed lenses.

I am using also Pentax O-ME53 Magnifying eyecup which enlarges an image a little bit and helps at focusing:
https://www.pentaxforums.com/forums/pentax-dslr-discussion/4043-view-finder-1-2-magnifier-2.html

I am also considering of buying MC JUPITER-9 2/85 Lens:
MC JUPITER-9 2/85 Lens

Great for portrets, you have a lot of time for manual focusing and bokeh is excellent.

Last edited by Fantocci; 05-14-2007 at 11:32 PM.
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