Can I use SR with m42 lenses?

**ismaelg** · 09-16-2010, 11:59 AM

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,

paperbag846 · 09-16-2010, 12:26 PM

Yes any lens, ANY lens.

**Lowell Goudge** · 09-16-2010, 12:43 PM

Originally posted by ismaelg

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.

Adam · 09-16-2010, 12:48 PM

You need to input the lens focal length at startup with any manual lens, but once that's set, SR will work just fine!

Adam
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**boriscleto** · 09-16-2010, 12:52 PM

Do you have the camera set to a mode that automatically turns off SR?

**ismaelg** · 09-16-2010, 12:54 PM

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!

virgilr · 09-16-2010, 02:23 PM

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!

**ismaelg** · 09-16-2010, 05:21 PM

Thank you Virgilr!

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

Thank you all!

09-16-2010, 11:59 AM	#1
ismaelg Loyal Site Supporter Join Date: Apr 2009 Location: Puerto Rico Photos: Gallery Posts: 2,681	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,

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09-16-2010, 12:26 PM	#2
paperbag846 Veteran Member Join Date: Jul 2010 Photos: Gallery Posts: 2,395	Yes any lens, ANY lens.

09-16-2010, 12:43 PM	#3
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,886	Originally posted by ismaelg 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
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,594	You need to input the lens focal length at startup with any manual lens, but once that's set, SR will work just fine! Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

09-16-2010, 12:52 PM	#5
boriscleto Loyal Site Supporter Join Date: Dec 2009 Location: North Syracuse, NY Photos: Gallery Posts: 16,475	Do you have the camera set to a mode that automatically turns off SR?

09-16-2010, 12:54 PM	#6
ismaelg Loyal Site Supporter Join Date: Apr 2009 Location: Puerto Rico Photos: Gallery Posts: 2,681 Original Poster	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
virgilr Veteran Member Join Date: Feb 2008 Location: Lachine, Quebec, Canada Photos: Gallery \| Albums Posts: 453	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
ismaelg Loyal Site Supporter Join Date: Apr 2009 Location: Puerto Rico Photos: Gallery Posts: 2,681 Original Poster	Thank you Virgilr! I was missing the Fl with S lens setting. That did the trick! Thank you all!

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