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07-18-2011, 02:55 PM   #76
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QuoteOriginally posted by Laurentiu Cristofor Quote
It may work for some lenses, but it won't work for others.

The notch solution requires a wide base - few of my M42 lenses have that.

In the end, these are hacks due to lack of a proper solution....
You are right of course these are hacks. In my experience Pentax m42's usually (and maybe always) have a wide enough base but many fine m42's do not. EDIT: RioRico checked a bunch of Pentax lenses and many have bases that are too small! https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/151857-why-did...ml#post1583835

I suppose a reasonable solution for the narrow based m42 might be to use a flanged type adapter and adjust the lens' infinity focus. Few of us are willing to try to adjust infinity focus on lenses however.

Bending adapter ears so they engage the mount securely helps a lot with loose lenses.



Last edited by newarts; 07-19-2011 at 06:40 AM.
07-18-2011, 07:32 PM - 1 Like   #77
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QuoteOriginally posted by newarts Quote
In my experience Pentax m42's usually (and maybe always) have a wide enough base but many fine m42's do not.
I just tested my narrow-base Taks on my ZX-M --
SuperTak 50/1.4 -- MacroTak 50/4(1x): barely
SuperTak 35/3.5 -- SuperTak 55/1.8 and f/2 -- SuperTak 105/2.8 -- S-M-C Tak 135/3.5 -- TeleTak 200/5.6: no

The wider-base Taks are no problem --
S-M-C Tak 135/2.5 -- SuperTak 200/4: yes

But all the Meyers, Ennas, Jupiters: no
07-19-2011, 05:53 AM   #78
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QuoteOriginally posted by RioRico Quote
I just tested my narrow-base Taks on my ZX-M --
SuperTak 50/1.4 -- MacroTak 50/4(1x): barely
SuperTak 35/3.5 -- SuperTak 55/1.8 and f/2 -- SuperTak 105/2.8 -- S-M-C Tak 135/3.5 -- TeleTak 200/5.6: no

The wider-base Taks are no problem --
S-M-C Tak 135/2.5 -- SuperTak 200/4: yes

But all the Meyers, Ennas, Jupiters: no
Good to know - thanks!
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