Made between: 1986 to 1988

Specs:

Focal length: 28-70mm	Weight: 440g (with the PK mount)
Optical design: 8 elements in 8 groups	Mount: Tamron Adaptall-2
Aperture: f/3.5~4.5 - 22, AE (32) 6 bladed aperure	Covers: Standard 35mm film size (24×36 mm negative)
Closest Focus: 0.3m (1ft)	Filter Size: 62mm

Image quality


Build quality

Quite a lot of plastic parts and apparently not the best build quality.
Feel and solidness is still okay.


Conclusion

Not too bad image quality for a zoom.
Wide open do have some purple aberration and a little glow.
But nothing too bad and sharpness sill quite nice.
Plus stop it down a little and it's nice all over.
And I find it to render quite nice with mostly good bokeh etc.
Distortion at 28mm can however be quite noticeable.

Build quality is a somewhat of a let down especially compared to the other adaptall lenses have tested so far.

But these are often find quite cheap and are still a very nice zoom lens.
So you do still get a lot of lens for your money.


Thumbs up:
Image quality (mostly stopped down)
Bokeh & Flare
Value for the money


Thumbs down:
Build quality
Distortion at 28mm

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Technical Info

Analogue
Scanner: Plustek OpticFilm 7600i
Film: Kodak Tmax 100
Developer: Kodak Xtol

Digital
Canon 500D with lens mount adapter
Auto White Balance and ISO 100