Cosina 55mm f/1.2 Test Shots

2008-11-24
I have tested my copy of Cosina 55mm f/1.2. I am very happy with the lens. This is my 3rd fast 50mm lens after my Pentax FA 50mm f/1.4 and Pentax A 50mm f/1.7.

Is it oustanding? Yes

How is the bokeh? I really like the smooth bokeh and the excellent speed in f/1.2

How is the build? I would call it quite outstanding for the $200 price range.

Can it replace your FA 50 f/1.4 and my A 50 f/1.7? No!

I answer 'no' due to the absence of 'A' and autofocus. I discussed with Mis and Igillian and I explain the reasons and happiness that the lens doesn't have AF and 'A' setting; otherwise, it would be a serious blow to my love of FA 50 f/1.4 and A 50 f/1.7. It is my LBA excuses to keep three similar focal range in 50mm/55mm.

I only do some snapshot testing on the lens

Cosina 55mm f/1.2 Purchase

Cosina 55mm f/1.2 Test Shots

Cosina 55mm f/1.2 Test Shots

Cosina 55mm f/1.2 Test Shots

1/4 sec, f/1.2, hand-held in iso 400 with K20D
Cosina 55mm f/1.2 Test Shots

breakfast in an Inn which is dim in the morning
Cosina 55mm f/1.2 Test Shots

indoor is great
Cosina 55mm f/1.2 Test Shots
Outdoor is excellent -- a normal lens
with large aperture
Cosina 55mm f/1.2 Test ShotsCosina 55mm f/1.2 Purchase


The lens has served me well as the fastest lens in my gear. It has smooth and very good bokeh, color and great DOF with K10D/K20D. But i would not trade in my FA 50 f/1.4 or A 50 f/1.7 for reasons of missing AF and 'A' setting.

I also noted the oval shaped ringed lights in bokeh. My iris is oval shaped instead of circular. It does not bother me as I love my lens to be a bit different than others. I see imperfection as the greatest opportunity for a picture difference.


Impressions & Notes:
  • Love the smooth bookeh from this fast lens
  • Outstanding color in both daytime and night time
  • Oval shaped ringed lights, not sure if it is due to aperture blades design or fast aperture
  • Gained speed invaluable for night time shooting. Instead of ISO 400, some shots can be done in f/1.2 in ISO 200. A much welcome addition especially to complement with noise control in high iso setting
  • Lens can't replace FA 50 mm f/1.4 or my A 50 f/1.7 due to missing AF and 'A' settings. I see it as a plus as it give me reason to hold on to 3 similar 50/55mm lens


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