[MF3D.FORUM:1378] Re: build your own medium format stereo camera, cheap and easy

[Brian Reynolds <reynolds@xxxxxxxxx>]

Don wrote:
> I looked up my old notes on pinhole photo experiments of 10 years
> ago showe that the sharpest 4x5 and 8x10 photoswere obtained on
> (4x5) at 5 sec at f 320 on T Max 100 and for 8x10 T Max 100 film the
> best was at f/450 about 15 seconds- under sunny 16.0 conditions, the
> best pictures were obtained with a G filter after increasing the
> exposure by a factor of about 5 fold.AT their best I never
> considered these photos as being very sharp when compared with
> standard B+W photos. I suppose that in this day of video and digital
> photography many have forgotten what a sharp photo should look like?
> DON
> P>S> I forgot to saythat f/320 was .0180 inch and that f/450 was
> P>S> about .025 inch.

Sorry, I didn't mean to imply that pinhole images were as sharp as
lens images could be (although they are as sharp as a lens stopped
down to the same f-ratio), just that it is possible to get sharper
results than most people have seen.

Sharpness isn't always the best solution when making an image.
Pinholes, soft focus lenses and other techniques allow you to use
different ways to look at a subject.

-- 
Brian Reynolds                  | "Dee Dee!  Don't touch that button!"
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