Believe this in made by Cosina but not a 100% there.


Specs:

Focal length: 28mm	Weight: 155g (5.5oz)
Optical design: ?? elements in ?? groups	Mount: Pentax K (PK)
Aperture: f/2.8 to f/22 5 bladed aperure	Covers: Standard 35mm film size (24×36 mm negative)
Closest Focus: A little closer then 0.3m (1ft)	Filter Size: 49mm (non-rotating)

Image quality


Build quality

Mostly made of metal, feels well put together and is nice and solid.


Conclusion

Maybe not something to brag about but still a very nice lens.
Really like how it renders, it's bokeh, contrast plus how it handles flare och backlight.
It's also small and lightweight but still well built which is a nice plus in my book.

Have however seen better sharpness, especially wide open.
It's not to a point where I find it a problem but some are more picky there than others.
But stop it down a bit and you will get a nice quality image.

Overall a lens I was pleasantly surprised over and a keeper for me.


Thumbs up:
Image quality
Bokeh, flare and backlight
Build quality and feel

Thumbs down:
Sharpness, especially wide open

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Technical Info

Analogue
Camera: Chinon CG-5
Scanner: Plustek OpticFilm 7600i
Film: AGFA CINEREX (X-ray film)
Developer: Radinal 1+100

Digital
Canon 500D with lens mount adapter