Re: Refocusing for IR photography - LF

[George L Smyth <GLSmyth@xxxxxxx>]

Yes, for macro use you are right.  However, for "normal" use, 1/3mm will be of very
little significance.

george

Ken Sinclair wrote:
> 
> Focussing with the front standard also changes the lens/subject distance
> and hence magnification ratio. This may not be much in a landscape
> somewheres near infinity, but in close-upor macro work would make accurate
> magnification work a bit more difficult.
> Ken
> 
> >George L Smyth <GLSmyth@xxxxxxx>:
> >
> >> Believe me, it is much easier to move the lens of a LF camera forward
> >>than it is to
> >> move the film plane back. <g>
> >
> >Why do you say this?  I use rear focus at least half the time.  For
> >close-ups rear focus is much better since minute changes in the lens
> >to subject positioning are more likely to adversly affect subject
> >overlaps and definitely change the magnification.
> >
> >On any monorail and field camera that I can think of it is equally
> >easy to use either standard for focus.
> >Sandor Mathe  -- sandor.mathe@xxxxxxxx
> >(905) 670-1225 x333  --  FAX (905) 670-1344

- -- 
 Handmade Photographic Images     
  http://www2.ari.net/glsmyth/
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