|Posted: Wed Aug 18, 2021 12:23 am Post subject: Re: Best M42 to PK adapter
|Recently acquired a lovely Pentax K1000 and would like to use some of my screw thread lenses on it.
So I bought a Pixco adaptor from ebay. It worked ok (except I couldn't stop down on lenses that didn't have an A/M switch).
But when it came to take it off, I couldn't get it to turn. The supplied tool did nothing except bend. I eventually had to remove the lens mount and fiddle with it to get it off.
Are there better ones than this? I don't want to waste any more money on this.
The original Pentax ones are the best, no special tools, just a small spring that holds it into the K mount. This can be released wityh a finger tip when you want to switch back to bayonet lenses.
When I was first adapting M42 lenses to PK I didn't use them on anything else, so I removed the catch from adapters & stuck them to the lens with thread lock - converting the lens to PK in a semi permanent fashion.
Any of my m42 lenses that are without the A/M switch are I think all presets which shut down just fine.
If you have later M42 lenses which are auto only you can wedge the pin on the rear so that it stops down straight away. Some adapters have an internal ring to press in this pin but there are apparently a few M42 lenses that will foul on adapters with this feature.
Worth repeating imho!
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Cameras: Sony A7Rii, Spotmatics II, F, and ESII
M42 Asahi Optical Co., Lenses: S-M-C Takumars 1:4.5/20 & 1:2/35, SMC Takumar 1:1.4/50, S-M-C Takumars 1:1.8/85, 1:3.5/135, 1:2.5/135 (II), 1:4/200, 1:4.5/500, & S-M-C Macro-Takumar 1:4/100
M42 Asahi Optical Co., Lenses: Auto-Takumar 1:2.3 f=35, Super-Takumar 1:2/35 (Fat), Super-Takumar 1:1.4/50 (8-element), Auto-Takumar 1:2 f=55mm, Tele-Takumar 1:5.6/200, Tele-Takumar 1:6.3/300
Nikon Nikkor AI-S 35-135mm f/3,5-4,5, Tamron SP 51B 17mm f/3.5, Tamron SP 55BB 500mm f/8, Tamron SP 19AH 70-210mm f/3.5