Digital BW, The Print

Clayton  -
 
DOF is not a sensor size issue.  It's a lens issue.  If you used the same lens that's on your Pro-1 on your 6x7 you'd get the same depth of field.  You wouldn't have much of a useful image, but it'd be sharp.  You can find the DOF tables in various places.  So, if you are looking a APS sensor, or full frame 35 size, you can get the answers on the charts.  Or, if it's the 35mm size sensor that interest you, just get out the old 35 and look at the DOF scales on the lenses you'd likely use.
 
None of this negates the good things a tripod can provide, even for the small sensos.
 
Tom Baker


Clayton Jones <cj@...> wrote:


Paul,

>Using the "sweet spot" of the full frame lens is a double edged
>sword. All else being equal, one gets more quality in a lens by 
>covering less area, especially at the wide end.

What I meant by "sweet spot" was an optimum aperture, not image
circle. With the Pro-1 I can shoot a scene a f/5.6 where I'd use f/32
with the P67 for similar DOF. Since the XT has a larger sensor the
increased DOF compared to MF will not be as dramatic as the Pro-1. So
my question is whether you have found the increase enough to allow
shooting at a more optimum aperture (many are sharper at middle
apertures, less distortion, etc) for the lenses you're using. And
also faster shutter as well (fewer blurry windblown things).

I'm asking because I look forward to moving to a larger sensor camera
someday, but have gotten terribly spoiled by the Pro-1's DOF (2/3
sensor). I'm wondering what I'd be giving up. When I was in DVNP in
January I used mostly f/5.6 and speeds were in the 1/400 to 1/600
range at ISO 50. There were no DOF limitations, everything was tack
sharp and no blurry flora even though there was a good breeze. It was
an absolute delight to work that way.

Regards,
Clayton


Info on black and white digital printing at 
http://www.cjcom.net/digiprnarts.htm






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