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REVIEW: Cosina 35-70mm f/3.5-4.8 MC Macro

Reviews
Posted by Bengt Köhler Sandberg 2014-05-11

Cosina 35-70mm f/3.5-4.8 MC Macro


Specs:

Focal length:
35-70mm
Weight:
220g
Aperture:
f/3.5 to f/22
6 bladed aperure
Mount:
Pentax K (PK)
But can also be found with other mounts.

Closest Focus:
0.4m (1.3ft)
Covers:
Standard 35mm film size
(24×36 mm negative)
Filter Size:
52mm




Image quality


Analogue B&W film
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro


Bokeh
Cosina 35-70mm f/3.5-4.8 MC
                                      Macro Cosina 35-70mm f/3.5-4.8 MC
                                      Macro Cosina 35-70mm f/3.5-4.8 MC
                                      Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                      35-70mm f/3.5-4.8
                                                      MC Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro



Digital
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Download full size image. Here
35mm

50mm

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

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

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

Youtube clip showing test images above in 100% cropped at center and corner.
Also in its original res.

Cosina 35-70mm
                                              f/3.5-4.8 MC Macro



Bokeh
35mm              
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
              70mm
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro

Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro

Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro

Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro



Close Focus funktion at 35mm
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro



Flare / Backlight
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro



Extra Sample
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro
Cosina
                                                          35-70mm
                                                          f/3.5-4.8 MC
                                                          Macro



More sample images can be found at:
http://www.sample-image.com/cosina-35-70mm-f3-5-4-8-mc-macro/




Filming
Cosina 35-70mm
                                            f/3.5-4.8 MC Macro


Build quality

Exterior is all plastic except for some rubber grip on the focus ring and not great feel to it.


Conclusion

Maybe not the best looker and not the most impressive at all points.

Sharpness at 35mm is not that great but gets fairly good at 50-70mm.
Corner sharpness is also quite well corrected true out the zoom and apertures.
Bokeh can look a bit off sometimes but do handle flare and backlight well.

A nice lens overall considering size, weight and okay image quality.
Plus can be found dirt cheap with some luck.


Thumbs up:
Quite good image quality from 50-70mm
Flare / Backlight
Value for the money


Thumbs down:
Sharpness at 35mm
Bokeh in some occasions
Plasticky


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Technical Info

Analogue
Scanner: Plustek OpticFilm 7600i
Film: AGFA CINEREX (X-ray film)
Developer: Kodak Xtol

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

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