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Forum: Troubleshooting and Beginner Help 03-17-2017, 09:01 AM

M42 Lens problem
Posted By boriscleto

Replies: 23
Views: 2,509

That is a non-infinity adapter.

This is an infinity adapter with an inner flange. But it costs several times what the lens would be worth...

CAMERA MITSUBA | Rakuten Global Market: Modern international M42 to PENTAX K Mount Adapter "instant delivery ~ 3 business days after shipping, black inner reflection to keep! Pentax screw mount lens can be attached to a K Mount body mount adapter

But if you were to invest in other lenses without the A/M switch it might be worth it...

Forum: Troubleshooting and Beginner Help 03-17-2017, 08:11 AM

M42 Lens problem
Posted By boriscleto

Replies: 23
Views: 2,509

From the description in the first post the Zeiss works fine, it stops down, and the other lens doesn't...

Forum: Troubleshooting and Beginner Help 03-17-2017, 08:04 AM

M42 Lens problem
Posted By boriscleto

Replies: 23
Views: 2,509

That is not a T-mount lens...The mount clearly has an aperture stop down pin, so it is M42...

Does the lens have an A/M switch? If not it is Auto only and will not stop down unless the pin is pressed...Using a normal M42 adapter it will alway be wide open.

There are M42 adapters with an flange inside to press the pin down, or one can be made. You can also gimmick the pin to keep it pressed down...

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