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Cosina Cosinon Auto MC 135mm F2.8 | | | | Sharpness | | | Aberrations | | | Bokeh | | | Handling | | | Value | |
| | Reviews | Views | Date of last review | | 4 | 42,782 | Thu December 23, 2021 | |  | | Recommended By | Average Price | Average User Rating | | 100% of reviewers | $27.50 | 8.50 | | | | 
supersize
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| Author: | | New Member Registered: November, 2013 Posts: 14 | | Review Date: December 23, 2021 | Recommended | Price: $30.00
| Rating: 10 |
| Pros: | very sharp, nice lens (extremely sharp at f 8-11) | | Cons: | very small CAs, disppearing when stopped down a few | | Sharpness: 10
Aberrations: 9
Bokeh: 8
Handling: 9
Value: 9
Camera Used: K-5 K200d. fuji x-e1, x-t100
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Very similar to the very sharp SUPER ALBINAR 2.8/135 (with one ED lens therein?) - designed 4/4 elements, (a copy of ZEISS Sonnar, West Germany?) lens hood included
My COSINON has K-mount.
+ good sharpness wide open
++ excellent sharpness with f-5.6  , but
+++ extremely sharp at f 8-11. self tested: 80 LP/mm with K-S1 (20 MP) and 90 LP wth Fuji x-T100 (24 MP)
+ moderate - good CA correction at f 2.8
+/++ scarecelly visible CAs at f 8-11 (up to f 5.6 in bokeh) 
+ some flare wide open - disappearing, when stopped down
++ nice neutral color rendition
+++ usuable for macro shootings with 36 mm macro ring and / diopter - at f11 very, very sharp results
highly recommended with 9.5 points 
****** with adapter suitable to full size sensor chip / nice portrait lens ******
I suppose, that the latest REVUENON 2.8/135 with K-mount had been produced by Cosina, too - same optical design
| | | | | | | Senior Member Registered: December, 2013 Posts: 223 | | Review Date: September 15, 2015 | Recommended | Price: $20.00
| Rating: 7 |
| Pros: | uniform sharpness, solid build | | Cons: | full stops, the coating | | Sharpness: 9
Aberrations: 7
Bokeh: 6
Handling: 7
Value: 8
Camera Used: Chinon ce-3
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good build quality which was unexpected, actually prefer it over the takumars when shooting with kodak technical pan, ilford sfx or agfa apx
colour wise its more neutral/natural when using e6 and c41 film
at f5.6 contrast is in between rikenon and takumar, infact f2.8 the contrast is good and f4 very good with no massive shift in colour unlike the takumars
| | | | | Veteran Member Registered: September, 2010 Location: Manchester, UK Posts: 2,653
1 user found this helpful
| | Review Date: March 30, 2013 | Recommended | Price: $20.00
| Rating: 8 |
| Pros: | Cheap, reasonably sharp stopped down | | Cons: | Soft at f2.8 | | Sharpness: 9
Aberrations: 9
Bokeh: 9
Handling: 8
Value: 8
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Another eBay impulse buy. Nicely built, well damped long throw focus, built-in lens hood. My copy has quite a lot of flare when wide open, which makes it appear quite soft at this aperture with plenty of fringing. Things improve considerably when stopped just one click down at f4 or more - it sharpens up considerably. Very nice bokeh. Some flare. Contrast can be quite poor requiring some post-processing. Hardly any CA or distortion.
Not at all bad for £12.
The first shot is at f2.8. The second and most of the others are at f5.6.
| | | | | New Member Registered: November, 2009 Posts: 1 | | Review Date: March 5, 2011 | Recommended | Price: $40.00
| Rating: 9 |
| Pros: | Sharp, cheap, nice colours, very good bokeh | | Cons: | A bit of CA and spherical aberration, shows some flare | |
A great 135. Nice sharpness already at f=2.8 and with good contrast. Bokeh is lovely and color rendition is nice, too.
Only downsides are some CA and spherical aberration visible at very harsh contrast edges. As most seasoned lenses also this one is a bit prone to flare.
But that said, the lens gives great results under field conditions. Has produced many keepers at indoor sports events and when shooting portraits from a distance.
This is the 135 that has made me stop trying out other alternatives in this length segment. Definitely recommended, especially given the low price.
My favourite taken with this lens:
Update: I for some strange reason my copy of this lens would not step down on the K5, whereas on the K200D it does. I guess the aperture mechanism is a bit stiff and the K200D is a bit more tolerant regarding this respect. Not a big issue, though, as I mostly use this lens wide open anyway.
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