Yashica ML 55/1,2 for portrait

 All were taken with Sony a6000

Ernst Leitz Elmar 5cm/3,5 enlarger lens & EPM1

I haven't use it much since last time I put it on NEX.
Let's see how it works on M4/3, Olympus E-PM1

the lens on yeenon helicoid

little crop on left

nice background for portrait

Carl Zeiss Ultron 50/1,8

All with NEX5

Petri Kuribayashi CC 50/2

Petri Kuribayashi 50/2 in M42 mount is sought after these days. People want the out of focus area looks like Meyer. So they called it Domiron copy. refers to the similar bokeh. Actually Kuribayashi 50/2 was made before Domiron. 1958-1960. So no way they copied Domiron (made 1966-1968)
This lens was made along with the camera, after M42 series. It use bayonet mount. You can judge these samples, is it same or close to M42 predecessor? or not.

First sample right after I opened the box,  without proper adaptation, handheld in my Sony NEX5

Now, it's attached on my helicoid adapter to NEX

Astro Kino Color IV 50mm/1,4

PO-108-1A 50/1,2

The lens was designed for Russian 16mm projector

lens only

Sharp at center, at same class with big brand which made 50ish/1,2.
yet, sharp at center only, like common 16mm lens projector.
Color and contrast is good. No wonder I can see clearly it's coating, small CA appear (you can see when zoom to 100%)
However there's bluish flare against strong light

Lens+39-42 ring+stepdown 52-42+52-42 helicoid+42-nex adapter

Konica Konishiriku Hexanon 50/1,8

Konica Konishiriku  has Konica F mount, which is shorter flange register than Konica AR mount.
I dont have the adapter yet, so I use helicoid adapter _ ring+glue gun like this

The results almost identical with Petri 50/1,7 mc

petri

konishiriku

Petri 50/1.7 MC

The lens comes in Pentak K mount, appearance looks like Cosina Lenses. maybe Cosina made (?)
I read somewhere that some Petri lenses were made by other maker.
The results also looks similar to Cosinon 50/1,7
Nice lens by the way. sharp at wide open and good at stoped down at edges.
show some purple fringing but acceptable.