Re: Samples from DA14/2.8!

[Peter Loveday]

Indeed.  One of the problems with retro-focus lens design, in conjunction 
with the fact you have to try to correct for the effective 'wide angle 
adapter' you have to build in to the front of the lens.

Love, Light and Peace,
- Peter Loveday
Director of Development, eyeon Software
----- Original Message ----- 
From: "William Robb" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, June 09, 2004 11:33 AM
Subject: Re: Samples from DA14/2.8!


One of the little bits of wisdom I have picked up along the way is
that for a lens to have optimal correction, it needs to have the rear
nodal point somewhere in the vicinity of the lens.
With the 40 something millimeter flange to focal plane distance that
most 35mm SLR's have (this includes the istD), getting a super wide
with everything excellent is going to be a very difficult
proposition.
Generally, really short focal length lenses are not the best
performers.
Rob mentioned a while back that the Mamiya 7 43mm lens was a much
better performer than the Pentax 6x7 45mm lens. Not having a moving
mirror in the way opens up all sorts of possibilities to the lens
designer.
William Robb