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Old July 11th 09, 08:59 PM posted to rec.photo.digital.slr-systems,rec.photo.digital
Ray Fischer
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Posts: 5,136
Default Lens speed: Not always the best choice

Chris Malcolm wrote:
In rec.photo.digital.slr-systems Ray Fischer wrote:
Praying They Don't Educate Themselves wrote:
Alan Browne
Likewise, the softer wide open shots only show as soft at 8x12" or so
(for a 35mm cropped sensor camera)

This is only true for all poorly figured DSLR glass. The same cannot be
said for true diffraction-limited glass (the most precise lens polishing
that money can buy), as is found in nearly all higher-quality P&S cameras.


LOL!


Simple test:


If somebody claims that a $400 camera has optics that are as good as
those in a $2000 lens then they are a liar or a crackpot.


If the optical design playing field was level. Which it most certainly
isn't in this case.

Cost depends on the optical problems the lens has to solve. A DSLR
lens has to deliver its intended quality while leaving enough room
between sensor and rear lens element to accomodate the mirror.


And if you have a tiny sensor then you certainly can compromise the
lens quality to match the sensor's abilities.

--
Ray Fischer