Archived posting to the Leica Users Group, 1999/09/23

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: [Leica] Noctilux pipe dream
From: Erwin Puts <imxputs@knoware.nl>
Date: Thu, 23 Sep 1999 22:34:36 +0200

There is a citation from Mr Weese, quoted by Bud Cook:
"A designer might try to make this lens as sharp and
"contrasty as possible wide open, while keeping it as close as possible to
"standard fine lens performance through the rest of its range But the Leitz
"designers did something else.  At maximum aperture and close to it, they
"aimed for reasonably high resolution with low contrast.  Low contrast? On
"purpose?

This is one of those stories that one likes to fantasize about. The 
wide open aperture performance of the Noct is just the best any 
designer, working within the current limits, could generate. The 
assumption of Mr Weese is that the designers could have produced a 
lens with higher contrast, but opted for low contrast, as they 
assume that this lens will be used in high contrast situations.  If 
Mr Weese had any idea of the formidable task of designing a f1 lens 
design he would  not make this statement. The Noct as it is by now is 
the best the designers can compute. The idea that Leica designers 
would purposely lower the contrast to suit  the high contrast 
situations where this lens might  be used, is  far removed from 
reality.
I really wish people would stick to their area of expertise before 
making wild guesses about topics they are not acquainted with.
  Erwin