Takumar 55mm f/2.0 M4 review

Nice sharp lens

https://www.ephotozine.com/article/asahi-super-takumar-55mm-f-2-0-m42-vintage-lens-review-32105

The article has it's flaws, it doesn't take into account format size, at least not as far as I got into it.... but still interesting info about the 50mm:

https://www.theatlantic.com/technology/archive/2018/05/how-the-50-mm-lens-became-normal/560276/

Nikkor 50mm F1.2

https://www.theweekendlens.com/nikkor-50-f12-ais.html#

Canon FL 55mm F1.2

https://www.theweekendlens.com/canon-fl-55-f12.html

Jena tesstar 50mm

Any screengrabs @DrDave ? I also have a Rokkor-PG 50mm 1.4, but I don't particularly like the MD mount. Prefer M42's or contax mounts.

@sammy If by "smooth circle iris" you mean rounded blades, then you want a lens with at least 8 aperture blades.

I have used a manual SLR Magic MicroPrime at 35mm with 13 aperture blades, very smooth circle. SLR Magic also has the 50mm T1.2 with 13 aperture blades in full frame (Image Circle : θ44) but only for E and X mounts.

These lenses are extremely high quality. Bright and sharp at the cost of weight. I shot side by side with an older Takumar 35mm and there was simply no contest. The SLR Magic was worth the price. If I were to sell all my vintage lenses, that's what I would buy. I only wish they offered an older mount (m42/contax comes to mind) so that they could be adapted to anything. I don't like to lock myself into Sony/Canon/Fuji mounts.

edit: they also have the APO-MicroPrime CINE and APO-HyperPrime CINE in EF mount. 10 blades T2.1