Zeiss Sonnar ZM

[TheGodParticle]

i bought one, second hand that was optimized for 1.5 and have a certificate from Zeiss stating it has been optimized for 1.5 so i dont think all the focus shift rumors are just rumors.

i chose it over the 50 lux asph and im lovin every picture it gives me on my m9

some sample pictures where precise focusing at 1.5 is clearly shown

[EdwardKaraa]

Originally Posted by jsrockit

Can you explain this? On the M9, this lens shifted more than any other lens I've used...and by large amounts.

As far as I understand, if optimized for 2.8, the focus will shift about 2-3 cm forward at MFD wide open, which can be easily compensated for, for example by focusing on the rear eye instead of at the front eye in a portrait. Stopped down a bit, the shift backwards should be less important and DOF should compensate for it. When you say large amounts, I would suppose there was an unfortunate combination of focus shift and lens miscalibration which is not so uncommon.