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Carl Zeiss Sonnar T* 1.7/50 C/Y - topimage Carl Zeiss Sonnar T* 1.7/50 C/Y - side

Carl Zeiss Sonnar T* 1.7/50 C/Y

My usage


Image quality


Sharpness and Contrast

Based on photos I have taken I have no reason to doubt that the measured MTF charts would not be as Zeiss has them measured.

Carl Zeiss Planar T* 1.7/50 C/Y - MTF (screen capture from Zeiss PDF)
According to Zeiss (underline parts different than in Canon's MTFs): "The Modulation Transfer (MTF) as a function of image height (u) and slit orientation (sagittal, tangential) has been measured with white light at spatial frequencies of R = 10, 20 and 40 cycles/mm."


Wide open - subjective

Closed down - subjective

highlight shapes - in corners "cateye" or not

highlight shapes - is the highlight circle having strong edges or soft edges

Lens flare


Nightphotos on city => strong lights

Vignetting and distortion



Textures etc.

Handling and usage

Focusing from infinity to 0.6 meter is about XXX degrees rotation. XXX subjective description of manual focus resistance XXX. XXX Manual focusing is very accurate and it's very easy to achieve accurate focus with live view.

Aperture can be selected 1 stop intervals. When using viewfinder and manually stopping down it's easy to calculate "clicks" from wide open to determinen the aperture into which lens is stopped down. XXX subjective feeling of aperture adjustment if any XXX XXX subjective description of focus ring width and usage with gloves if relevant XXX

XXX subjective description of lens hood if applicable - physical and flare protection XXX XXX subjective description of lens cap when lens hood is used XXX

XXX Polarized usage with hood if applicable XXX XXX Lens hood effectiveness with filters XXX

Build quality and basics

Build quality is as good as I could imagine, from different planet than Canon lenses.

Carl Zeiss Planar T* 1.7/50 C/Y - constructions Lens dimensions with C/Y to EOS adapter and lens caps are: diameter 59mm, length 36+XXXmm, weight 195+XXXg. This lens isn't internal focusing and therefore extends when focused closer. Lens extends about XXXmm when focused to minimum focus distance 0.9m. Lens uses filter size of 55mm like most of "slow" Contax lenses.

Minimum aperture is f/16. Aperture has XXX blades and aperture remains XXX very round even at f/22 XXX. Lens has 7 elements which are in 6 groups. Actual focal length is 51.9mm. Minimum focus distance is 0.6m, which results 0.09x magnification and full frame (36mm x 24mm) coverage of 416mm x 277mm. Magnification is calculated based on focal length and minimum focus distance.






See photos in my picturebank taken with this lens.

Carl Zeiss lenses links (Link to parent category)

digLloyd Zeiss ZF lenses - Carl Zeiss Distagon T* 35mm f/2.0 - Carl Zeiss Makro-Planar T* 100mm f/2.0 - Test of 28mm lenses including CZ 28/2.8
Pebble Place - Carl Zeiss Planar T* 2/100
Pebble Place - Carl Zeiss Macro-Sonnar T* 2.8/100 N
SLR Lens Review - Contax Sonnar T* 2.8/135mm C/Y
SLR Lens Review - Contax Sonnar T* 2.8/85mm C/Y
SLR Lens Review - Contax Planar T* 1.7/50mm C/Y
Pebble Place - Contax Sonnar T* 2.8/135mm C/Y
Some example pictures of Zeiss lenses - samples from various lenses

Pictures of Carl Zeiss Planar T* 1.7/50 C/Y

Lens extends when focused

Carl Zeiss Planar T* 1.7/50 C/Y - lens extension when focusing close
Distance from EOS lens mount (including adapter) to end of the hood is XXXmm at infinity and XXXmm at minimum focusing distance.

Front/side projection

Carl Zeiss Planar T* 1.7/50 C/Y - Front/Left
Made in Germany.

Huuhaakuukausi 2nd, 2009