Product
Carl Zeiss Sonnar 135mm f/2.8 HFT is a manual focus prime lens for full frame cameras.
Optical design
Bright lens thanks to the high aperture value Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle.
Physical characteristics
Weights 450 grams so plan ahead, carry only if really necessary. 98 mm long, requires consideration if you want to carry in the camera bag. With a lens filter diameter of 55 mm commonly filter size, offers a wide range of filter options.
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