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Forum: Pentax SLR Lens Discussion 08-08-2019, 11:58 AM  
Advice on de-clicking a Takumar 35mm f2.3
Posted By Ben J
Replies: 21
Views: 2,876
Purely for those searching in the future, Kozlok helped me to understand that this lens can't be de-clicked. The iris seems to rely on opposing tension from the spring and the stop mechanism, and just pulls back to f22 without the bearing in place. I assume this would be the case for all other lenses with the same mechanics.

Also, I found replacing the little spring steel part that pushes the bearing into place completely impossible. So, a resounding karmic victory for the Lens Protection League.

Thanks all the same for the encouragement!
Forum: Pentax SLR Lens Discussion 08-08-2019, 02:47 AM  
Advice on de-clicking a Takumar 35mm f2.3
Posted By Ben J
Replies: 21
Views: 2,876
Wonderful, thanks Kozlok and c.a.m. - I was looking through the other post with YouTube links and missed this very helpful one. I'll give it a go and will experiment with some teflon tape for resistance.
Forum: Pentax SLR Lens Discussion 08-07-2019, 03:37 PM  
Advice on de-clicking a Takumar 35mm f2.3
Posted By Ben J
Replies: 21
Views: 2,876
Thanks folks. Luckily, I had one more glance before fleeing.

My other M42-mount lenses are the preset variety, so already have the click-less aperture ring and require no sacrilegious butchery. The info above suggests I would need to go in from the front, which is probably too big a job for me.

Thanks for the advice.
Forum: Pentax SLR Lens Discussion 08-07-2019, 07:38 AM  
Advice on de-clicking a Takumar 35mm f2.3
Posted By Ben J
Replies: 21
Views: 2,876
Ah, I see. That kind of forum. Apologies all.
Forum: Pentax SLR Lens Discussion 08-07-2019, 04:50 AM  
Advice on de-clicking a Takumar 35mm f2.3
Posted By Ben J
Replies: 21
Views: 2,876
Hi all. Hope I'm in the right place.

I'm a filmmaker and collect M42 mount lenses, which I adapt to EF-mount.

I'd like to de-click my Takumar 35mm 2.3, but can't find much info on this kind of lens. There are no screws to access the mount on the back. It looks like I need to rotate the rear element (using the two grooves) to access the iris section. See images.

Any advice? I'm reasonably capable, but certainly in danger of not being able to reassemble if I make a wrong move.

Many thanks
Ben
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