Summicron 35mm M3 version fit on M240?

[calfunk]

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Hi all,

 

Have any of you tried fitting the M3 googled version of Summicron 35mm on M240? Does it fit and is there any issue on usage?

 

Thanks!

[lct]

I have no experience with the goggled Summicron sorry but i would expect the same kind of issue as with my goggled Summaron 35/2.8, namely lack of focus accuracy due to the "eyes". Now you will hardly notice it if you shoot mainly at f/4 or above due to the wider DoF.

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[jaapv]

If you use it goggled you won't have a problem. It will fit, the difference caused by the different viewfinder magnification may give a minor discrepancy at closer distances.. The goggles may conflict when mounting if you have a handgrip fitted.

[calfunk]

Thank you all, if focusing accuracy is a concern, I guess it's a no go. Really tempted by the much lower price than the non-googled version.

 

Also my Luigi half case might be a problem for mounting the lens too.

[jaapv]

I may add that I never had any focusing accuracy problems with my Summaron 3.5/35, not even on the M8, which is more critical than the fullframe Ms.

[Dougg]

Major focus accuracy issue only arises if you do a bit of surgery and remove the goggles. Not a good idea. I have used my goggled f/2.8 Summaron on the M240 with no mechanical or optical problem. I am not aware of any focus change due to the M240's .68 (vs .72x) finder magnification. I only can complain that the goggles do dim the viewfinder somewhat.

 

Doug

Edited January 21, 2015 by Dougg

[jaques]

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Thank you all, if focusing accuracy is a concern, I guess it's a no go. Really tempted by the much lower price than the non-googled version.

 

Not so Fast!

 

I have this lens and on my M digital cameras the focus is PERFECT!! 100%. And the lens is very sharp- even wide open. Furthermore I really like the more compact frameline view through the OVF.

 

And I think it focuses closer than the non-goggled version?

 

here is a (somewhat boring) sample wide open at f2 with a crop:

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[Famjam]

How come f2 if the lens is f3.5 ??? 

[a.noctilux]

12 hours ago, Famjam said:

How come f2 if the lens is f3.5 ??? 

We are talking about Leica 35mm (and other lenses also) lenses which have naming after their widest aperture.

Summicron IS f/2

Summaron can be f/2.8 or f/3.5 ( even f/5.6 for the  2.8cm or 28mm lens ! )

Edited July 9, 2019 by a.noctilux

[Michael Geschlecht]

18 hours ago, Famjam said:

How come f2 if the lens is f3.5 ??? 

Hello Famjam,

Welcome to the Forum.

The focal length is 3.5 centimeters. This means that the distance from the second nodal point (An optical measurement point.) to the image plane (film or sensor) is 3.5 centimeters. Which is 35 millimeters.

F2 is the aperture. This means that the greatest opening of the diaphragm at the second nodal point would be the focal length divided by 2.

35mm  divided by 2 = 17.5mm.

This would be the mathematical opening at the second nodal point.

Best Regards,

Michael