Comments on: Comparing Zoom Range FX/DX Lenses for a Nikon D90 11-300mm http://www.wolfcat.com.au/randomrants/2010/01/postid-854/ if at first you do succeed try not to look astonished Wed, 08 Feb 2012 11:13:49 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Daniel http://www.wolfcat.com.au/randomrants/2010/01/postid-854/#comment-114 Daniel Tue, 16 Feb 2010 07:34:19 +0000 http://www.wolfcat.com.au/randomrants/?p=854#comment-114 Actually the focal length is always measured in FX, and to make a fair comparison the sensor of the camera should be in the same place for every shot. If you still don't get the same on the Sigma 18-200 and Nikkor 70-300, well, let's say I do not trust Sigma, so probably it doesn't go all the way up to 200 really then ;) (If your statement would be true. The difference between 200DX and 200FX would be as large as 200FX and 300FX, which clearly are not true). Nice test though. Actually the focal length is always measured in FX, and to make a fair comparison the sensor of the camera should be in the same place for every shot.

If you still don’t get the same on the Sigma 18-200 and Nikkor 70-300, well, let’s say I do not trust Sigma, so probably it doesn’t go all the way up to 200 really then ;)

(If your statement would be true. The difference between 200DX and 200FX would be as large as 200FX and 300FX, which clearly are not true).

Nice test though.

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