[MF3D.FORUM:1663] Re: Using front shift to simulate camera movements?

[Tom Hubin <thubin@xxxxxxxxx>]

Bill Glickman wrote:
> 
> Tom
> 
>         I'm not understanding this....  If you look forward you see an
> image, if you turn 90 deg and use one mirror at 45 deg, you will see the
> same image.  S

You will see a mirror image of the object. An object rotating clockwise
will produce a mirror image that is rotating counterclockwise. Any odd
number of mirrors will do this. It does not matter what the angles.

Try to read a book through a single mirror at any angle. Now try two
mirrors.

> So why wouldn't the film see the same thing looking in the
> mirror? 

It will.

> Are you sure you would have to view the slide with the emulsion
> side away from our eyes to get the same effect as if the cameras shot
> straight at the scene?  

You need to project or view a mirror image of the slide to normalize the
view. Either project or view through an odd number of mirrors or flip
the slide over.

As for printing, you need to discuss this with your printing
practicioner. Good luck.

> Hmmmm..if so, that does not sound good, but then
> again we look straight through the slides anyway?

Yes, but the entire process of printing, viewing, and projecting are
predicated on using the emulsion side of the film. That is a very very
thin layer with all of the info. The thickness of the film and any waves
in it do not matter. If you use the other side of the film then the film
thickness and irregularities will reduce the quality of what you see. 

Now I'm not saying that a lot of folks will know the difference. Lord
knows there are lots of imperfections in viewers and projectors. But
some folks on this list are picky about resolution or sharpness.

Flip some slides around and view or project them. Maybe film substrate
is so thin and flawless these days that it is hard to tell the
difference.

Tom Hubin
thubin@xxxxxxxxx