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09-16-2010, 11:59 AM   #1
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Can I use SR with m42 lenses?

Hi,

Sorry if this has been posted before but a quick search did not show much.
With my older K mount lenses, whenever I turn on my camera (K100D Super) it asks for the focal lenght so Shake Reduction can be used. But testing an m42 screwmount with a genuine adapter, I don't get it and the SR off icon shows up. Can I have the SR work with m42s? if so, how?

Thanks,

09-16-2010, 12:26 PM   #2
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Yes any lens, ANY lens.
09-16-2010, 12:43 PM   #3
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QuoteOriginally posted by ismaelg Quote
Hi,

Sorry if this has been posted before but a quick search did not show much.
With my older K mount lenses, whenever I turn on my camera (K100D Super) it asks for the focal lenght so Shake Reduction can be used. But testing an m42 screwmount with a genuine adapter, I don't get it and the SR off icon shows up. Can I have the SR work with m42s? if so, how?

Thanks,
it may be that it does not believe a lens is connected, since many M42 lenses are either painted/anodized bases which are insulating, or simply are too small a diameter to touch the pins and short them out.

I don't have a K100 so I don't know whether there is an option in the menus to permit this. SOmeone once referenced a function like use screw mounts but I don;t know if it applies.
09-16-2010, 12:48 PM   #4
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You need to input the lens focal length at startup with any manual lens, but once that's set, SR will work just fine!


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09-16-2010, 12:52 PM   #5
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Do you have the camera set to a mode that automatically turns off SR?
09-16-2010, 12:54 PM   #6
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Thanks!
Adam, that's the problem. I'm not getting the request for that input as I do with the K or M lenses. I'll check tonight what Lowell said. I think the contacts in the body were exposed with this particular lens.

Thanks!
09-16-2010, 02:23 PM   #7
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Just a quick note- I've dropped a industar 50-2 with the genuine pentax m42 adapter on my 100DS, wich does not have ANY flange at all- the contacts are exposed to the world!- and I am still prompted to input the focal length at camera power on.

Probably a menu setting. Here's mine (what I think are pertinent, I haven't changed these since I bought the camera ~ 4 years ago):

Custom setting tab

AE-L bttn on M expsr: option 2, Tv shift (this sets the shutter speed based on a stopped down reading when pressing the AE-L button in manual exposure mode).

Fl with S lens used: option 2, Available (this allows the AF to sense when using manual focus)

Use aperture ring: 2, permitted (allows use of the aperture ring on the lens).

That's all I can see in the menus that would deal with use of manual focus, non auto exposure lenses... hope that helps!
09-16-2010, 05:21 PM   #8
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Thank you Virgilr!

I was missing the Fl with S lens setting.
That did the trick!

Thank you all!

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