All Forum Comments
Comment by MikeInDevon posted on Redone Astro at 23/06/2023 - 09:36
Cheers
Mike
Comment by MikeInDevon posted on After the storm... at 15/06/2023 - 16:58
Here's my take on this.
If you look at the K mount lens the red dot on the mount is aligned with the focus red line on the lens body.

My experience is that there is an advantage with paying for a genuine Pentax adapter as then the aperture and focus points on an attached lens line up correctly with the camera body i.e. they are at the 12 o'clock position. Here's an example using a genuine Pentax adapter with M42 lens, a Helios 44-2, showing the red dot and that it aligns correctly.





With a cheaper cloned adapter they fit but the lens no longer lines up at the 12 o'clock position. You can tell whether the alignment is correct as the adpaters have a red dot on them. When the Pentax made adapter is fitted to the M42 lens the red dot on the adapter aligns with the lens' red focus position mark. With a clone copy adapter these re marks don't align. Again using the Helios 44-2 lens now with the cloned adapter.
Note I have removed this adapter's spring locking tab.



Things get more complicated when using a M39 lens, I have an Industar-50 lens with a M39 mount. To use this lens I have to fit a M39 to M42 adapter (non Pentax) and my genuine M42 to Pentax K adapter. Using this combination the lens and adapters can now be fitted to the camera but does not align correctly. I don't know if a genuine Pentax M39 to M42 adapter is available, but if this exists perhaps the lens would have aligned correctly.




A couple of notes:
I have had adapters get very tightly attached to the lens, if this happens fit a lens cap on to the adapter and rotate it anticlockwise to release the adapter from the lens body.
Also I have tried another cloned M42 - PK adapters and again this did not align correctly but the misalignment was not the same.
Hope this helps.
Regards
Mike
Comment by MikeInDevon posted on Adapter advice. at 05/06/2023 - 20:40
Regards
Mike
Comment by MikeInDevon posted on This Evening looking towards Jennycliffe Bay. at 02/06/2023 - 22:22
1. For that fabulous glow of the roses.
3. An almost abstract great B&W.
Regards
Mike
Comment by MikeInDevon posted on What else is a 1.2 for... at 01/06/2023 - 22:19
Comment by MikeInDevon posted on Wansfell Pike at 31/05/2023 - 20:46
Cheers
Mike
Comment by MikeInDevon posted on Early morning in Ambleside at 31/05/2023 - 11:00
Cheers
Mike
Comment by MikeInDevon posted on Soft Forget-me-not at 27/05/2023 - 14:36
Cheers
Mike
Comment by MikeInDevon posted on The things I do for THAT picture... at 27/05/2023 - 07:55
Cheers
Mike
Comment by MikeInDevon posted on The first of many... at 26/05/2023 - 07:46


Regards
Mike