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REVIEW: Cosina Cosinon-Z 35-70mm f/3.5-4.5 MC

Reviews
Posted by Bengt Köhler Sandberg 2013-01-26

Cosina Cosinon-Z 35-70mm f/3.5-4.5
                              MC

Specs:

Lens:
35-70mm

Aperture:
f/3.5 to f/22
5 bladed aperure

Closest Focus:
0.7m (2.5ft)

Weight:
327g

Mount:
Pentax K

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


Image quality

Wide open:
Not crazy sharp but good enough in my book
35mm have quite a lot of corner softness which is mostly gone by f/8
Gets better when you zoom in.

Nice and sharp stopped down and renders good.

Analogue B&W film
Cosina Cosinon-Z
                            35-70mm f/3.5-4.5 MC
Download full size image. Here (up to 5mb)
35mm

50mm

70mm
f/3.5f/5.6 - f/8 - f/11 - f/16 - f/22




Bokeh
35mm              
Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC

Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC
               70mm
Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC

Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC

Flare / Backlight
Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC
Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC



Digital
Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC
Download full size image. Here (up to 5mb)
35mm

50mm

70mm
f/3.5f/5.6 - f/8 - f/11 - f/16 - f/22




Bokeh
35mm              
Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC

Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC
               70mm
Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC

Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC

Flare
Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC
Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC


Filming
Cosina
                                              Cosinon-Z 35-70mm
                                              f/3.5-4.5 MC



Sample
Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC
Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC
Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC
Cosina
                                                          Cosinon-Z
                                                          35-70mm
                                                          f/3.5-4.5 MC


Build quality

Really good and next to all metal so it's nice and solid.
Also quite good feel to it.


Conclusion

Moderate image quality plus a nice and solid build quality.
Handels flares very good and bokeh looks farly good.

Closer focus distance would have been nice and 0.7m can be a problem at some occasions.

Quite a nice lens, especially considering what you can find this for.


Thumbs up:
build quality
Flare


Thumbs down:
Closest Focus: 0.7m (2.5ft)




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Technical Info

Analogue B&W film
Scanner: Plustek OpticFilm 7600i
Film: AGFA CINEREX (X-ray film)
Developer: Kodak D76

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

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