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.

Miranda MC 24/2,8 PK A mount

in Lenses world, Miranda is known as brand with their own mount. However this lens is said not produced by the real Miranda. Some say this is Cosina made lens. it's character, build. indicate that.

My first impression; 

It can focus close for macro.  around 10cm, but It's not real macro lens.
At infinity, F8 is best performance.
very low distortion

wide open

Against strong light

 

Close focus, wide open

SMC Pentax 28/3,5

This lens said to be tack sharp wide lens from Pentax.

see picture below to know the sharpness

crop 100% from picture above

SMC M Pentax 50/1,4

Low light, action

no edit, original JPEG file

pake 40D minjem

Head to head, SMC M PEntax 50/1,4 vs CZ HFT 50/1,4 Rollei @f2,8

wide open

Speed comparation

smc

Nikkor 55/1.2 AI

sampel dengan Sony NEX5

Zenitar 16mm/2,8 mount PK

Untuk uraian for detail click di link Zenitar 16mm/2,8 M42

Taman Pintar f8

open wide

 f 11 or 16 

forgot the f, flashed

forgot the f, flashed

f 5,6