From: DagT
Den 24. jan. 2011 kl. 21.30 skrev Paul Stenquist:
On Jan 24, 2011, at 3:00 PM, steve harley wrote:
On 2011-01-23 15:51 , Paul Stenquist wrote:
PhotoShop controls do the same thing the shift and tilt
lenses do -- they rearrange reality.
that's the "same thing" in the sense that bird eggs and
kangaroo pouches are the same thing; i'm not a purist nor
very interested in tilt/shift, but i do know Photoshop can't
vary the focus distance according to position on the sensor,
it can simulate out-of-focus, but it can't _simulate_
in-focus
No. The two technologies aren't as disparate as a kangaroo pouch
and an egg. A better analogy would be driving two different
routes -- one scenic and one fast -- to get to the same place. Or
traveling to the same place by car rather than bicycle -- one
being more pure, the other more efficient.
Yes, it's true you can't bring objects into focus with PhotoShop
? at least not to any great extent. But using tilt for DOF is
really only a factor in large format photography, where DOF is
extremely limited. With a 16 x 24 sensor, extensive DOF is easy
to achieve. Tilt would be relatively useless in this case, except
perhaps for macro photograph. And even in that case, the entire
camera can usually be tilted to achieve matching focus.
There's a reason why no one is producing new tilt/shift lenses
for DSLR cameras.
Paul
Like this?
http://www.hartblei.com/lenses/lens_35mm.htm
If you click on the price list you get the message:
"Super-Rotator lenses are out of stock...
(please, don't ask about availability - if item is available, it's
mentioned in the price list)"
That message has been on the price list for about 2 years now. I *have*
been checking.
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