Re: Creative negative/positive sandwiching techniques

[Peter De Smidt <pdesmidt@xxxxxxxxxxxxx>]

Ken Sinclair wrote:
> 
> Rolland,
> 
> >I recently spotted an old issue of "Popular Photography" in which beautiful
> >soft focus pictures were taken with slide film.
> (snip)
> >2.  Take a picture of your subject with the lens out of focus and with the
> >    camera set to overexpose the slide film by one stop.
> 
> >3.  Take an identical picture of your subject, but this time, make sure the
> >    subject is in focus and that the camera is set to overexpose the slide
> >film
> >    by two stops.
> 
>  I do believe this should be "underexpose" by one stop on each exposure,
> otherwise you would end up with final exposure 2 stops overexposed.
> 
> Actually, this can result is some attractive images, but beware of "overuse"
> 
> Ken
> 
Actually, Rolland was correct.  Sandwiching two *overexposed* slides,
each alone of which would be of low overall density, together raises the
overall density.  I've sandwiched three overexposed EIR slides to get an
interesting image with proper density.  There was an article on
sandwiching in a recent edition of a canadian photo mag.  Sandwhiching
underexposed slides, which are already have too high of an overall
density, would simply increase the total density even more.

Regards,
Peter De Smidt
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