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sdQ + Super Takumar 135mm f/2.5 weirdness

Started Sep 11, 2016 | Discussions thread
mikeodial Senior Member • Posts: 2,580
Re: sdQ + Super Takumar 135mm f/2.5 weirdness

Antone wrote:

Similar to my 35mm f/2 Super Takumar, my 135mm f/2.8 also has some strange exposure issues occurring. These are with the 135mm f/2.5. Camera was set to aperture priority and this series of images are in order - f/2.5, f/2.8, f/4, f/5.6, f/8, f/11 and f/16. All at -3EV and all in-camera JPEGs. Note how the exposure changes and the colors fade. There doesn't appear to be a way to set the camera at f/0 like I can with my SD15.

135mm f/2.5 at f/2.5

135mm f/2.5 at f/2.8

135mm f/2.5 at f/4

135mm f/2.5 at f/5.6

135mm f/2.5 at f/8

135mm f/2.5 at f/11

135mm f/2.5 at f/16

My guess is these are color casts showing at different f stops. I have the same issue with Zeiss lenses on my SD1M.

The solution sounds complicated but it's not as bad as it sounds. A technical article here will solve the problem. I found it best to create (correction) shots for Photoshop at each f stop slightly out of focus and that solves most of the problem. I must admit the problems generally get more noticable at the lenses get wider.

http://www.blauvista.com/html/colour-correction-sd1m/

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Ricoh GR II Sigma SD1 Sony a7R II Leica SL (Typ 601) Sigma sd Quattro +14 more
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