[rollei_list] Re: Lens Tests

  • From: Ardeshir Mehta <ardeshir@xxxxxxxxxxxx>
  • To: rollei_list@xxxxxxxxxxxxx
  • Date: Sun, 27 Mar 2005 18:51:07 -0500

On Sunday, March 27, 2005, at 03:08  PM, Don Williams wrote:

> I think you can measure lens resolution with an optical instrument 
> placed at the film plane. At least that seems to be how it's done on 
> lens factory production lines, film doesn't play a part as far as I 
> know.

I think you may well be right.

Does anyone have statistics for different lenses such as Xenotar, 
Planar, Sonnar, Summicron, Summilux, Ektar, Canon EF f/1.8 50 mm, etc., 
when their resolutions are measured in this manner? Surely they are 
more meaningful than resolution-of-lenses figures given by taking 
photographs on actual film, which can be skewed not only by the 
limitations of the film, but also by limitations such as improper 
focussing or the possibility of the film not lying flat in every shot!

The same lens used in the future, with a really advanced digital back, 
may give a much better picture than with film. Right?


Ardeshir <http://homepage.mac.com/ardeshir>





















Ardeshir <http://homepage.mac.com/ardeshir>

















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