New Member Registered: November, 2013 Posts: 14 | | Review Date: March 12, 2015 | Recommended | Price: $20.00
| Rating: 10 |
| Pros: | extremely sharp with f 8-11 - a phantastic vintage lens | | Cons: | very, very few CA's in the corners | | Sharpness: 10
Aberrations: 9
Bokeh: 10
Handling: 8
Value: 10
Camera Used: spotmatic, k-s1 k-5 k-x k200 fuji x-e1 x-t100
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Item 1: Though my M42 screw mount item has the same problem with focus ring and a few dust, I've fitted my k-x to higher contrast (filter). This improves contrast and eleminates some flare.
Item 2: I've got an second 135 f 4 sonnar with clear lens elements and exa mount for portrait shootings of our kids. WOW ! What a sharpness stopped a few down to f 8 
I use the M42 Version only for butterflies with an additional macro tube - an achromatic 2/1 lens element integrated into the tube = focal reducer 0.85x.. absolutely no CAs at f11  the result is an improved macro version 3.5/120 mm. No additional macro tele lens affordable. I'm very impressed. (+++)
++ excellent sharpness
++ 5/4 lens construction and fluorite glass will guarantee nearly no CA's 
So I've changed the optical construction from 5/4 to 7/5 with astonishing results: absolutely no CA's and very high sharpness of details
90 LP/mm = 180 black and white lines per mm is a professional value (with 24MP Fuji sensor, not PENTAX)! My best single tele lens of 135 mm.
Because of my very sharp, very well corrected macro photos: 9.5 points totally
highly recommended
(changed review in JUNE. 2023)
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Pentaxian Registered: April, 2011 Location: Lost in translation ... Posts: 18,076 | | Review Date: May 25, 2014 | Recommended | Price: $15.00
| Rating: 7 |
| Pros: | Tank-like build, long throw, sharp downed down ... | | Cons: | Slow @ f4, my copy needs more servicing - focus ring blocking | |
Bonjour,
Just a quick entry for this 135/4 aus Jena (Carl Zeiss). I picked it up cheap at the Poiters annual swap meet since it had rear element fungus (which I cleaned out easily) and it had a very stiff focus throw (more problematic).
Have shot a few test and really not too impressed for the moment. I need to further "overhaul" this lens ... Thus a base benchmark "7" overall mark/rating for the moment with sample images to come later once repairs are (hopefully) finalized.
Allez et salut, J
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