Published on 01/22/2007

Carl Zeiss proudly the proclaim that their new ZF lenses designed for Nikon SLR cameras are the sharpest SLR lenses they've ever tested.
Details from the newsletter include:
The new ZEISS ZF lenses went to test for resolving power recently. Attached to a Nikon F6, which was mounted on a Sachtler heavy duty tripod, we exposed our Eastman resolution test chart onto Kodak Imagelink HQ film. The best we had ever achieved before with any SLR lenses was 250 lp/mm.
The new Planar T* 1.4/85 ZF achieved that same resolution at f/5.6, and even down to f/2.
The new Planar T* 1,4/50 ZF went even further: It reached 320 lp/mm in the aperture range from f/5.6 to f/2.8, and 250 lp/mm at f/2. Read the full article here