Specs:

Lens:
55mm

Aperture:
f/1.8 to f/16
6 bladed aperure

Closest Focus:
0.6m (2ft)

Weight:
193g

Mount:
M42

Covers:
Standard 35mm film size (24×36 mm negative)

Image quality

Wide open:
Next to no cornes softness which is quite impressive
Little lighter towards the middle and you lose some contrast
Mild vignetting

Renders very good at all apertures.

Build quality

Very good and built like a tank.
Also have a nice feel to it.


Conclusion

This was my favorite standard lens when I used a digital SLR but sold this when I went over to my analogue Nikon equipment.
Which I regret after picking up the love for m42 lenses again.
But now I found a nice new copy and can see why I loved this lens before.

It's a awesome lens and a greatly underappreciated one considering what you can buy this for with some luck.
Compare this to my now favorite SMC Takumar 55mm f/1.8 which is a renowned as a great lens.
This have a tiny bit better corner softness but little worse bokeh.
The Takumar have extremely good feel and this have a nice quality feel but not as good as the Takumar.


Thumbs up:
Image and build quality


Thumbs down:
Closest Focus of 0.6m (2ft)




Technical Info
Scanner: Plustek OpticFilm 7600i
Film: Rollei RPX 100
Developer: Kodak D76