Re: slit width

[simon nathan <simonwide@xxxxxxxxxxxxx>]

IN 1972 TIMES I CONSIDERED SOLVING
THIS ON MY POS-CYCLOPAN BY USING ONE LENS IN PARTICULAR FROM THE HASSELBLAD
LENS GROUP, THE ONE THAT GAVE AUTO EXPOSUURE CONTROL VIA F.STOP. I WAS
CONCERNED ABOUT EXPOSURES ON THE BACKLIT PART OF THE SWIVEL. THINK ABOUT
COVERING YOUR BACKSIDE THUSLY, OR CRUDELY CREATE A NEUTRAL DENSITY TENT.
ISN'T EASY BEING SIMON/WIDE. EVEN ON THE HULCHER-BUILT GLOBUSCOPE (NOT
THE SHINY DIME BANK MODEL) THIS'D BEEN SOLVED PLUS MATCHING FILM-AMOUNT
MOVEMENT TO ZOOM LENS IN MOTION.YIKES!

Mike Sinclair wrote:

Awhile ago I remember serious banding on our Roundshot 35S, but not from
slit width. Instead, it was from motor speed stepping. On fast scans with
the variable exposure enabled, the motor controller was unable to change
speeds fast enough and instead, produced a series of increasing/decreasing
stepped velocities (the motor sound was very noticeable as a series of
discrete tones instead of the expected smooth tonal gradient). It's been a
while since I've used a Roundshot so don't know if this has been fixed.

-Mike-

> -----Original Message-----
> From: ADavidhazy [mailto:ANDPPH@xxxxxxxxxxxxxxxxxx]
> Sent: Monday, September 04, 2000 5:58 AM
> To: panorama-l@xxxxxxxxxxxxxxxxx
> Cc: ANDPPH@xxxxxxxxxxxxxxxxxx
> Subject: Re: slit width
>
>
>
> > > For slower speeds without changing to very small slit
> widths try using ND
> > > filters.
>
> > The film in my camera isn't getting enough light..... so
> this wouldn't work!
>
> I thought the original question implied that what was being
> contemplated was
> using small slit widths and being concerned with possible
> banding. I guess I
> made an incorrect inference. Sorry.
>
> Andrew  o o  0 0 o . o  Davidhazy, Imaging and Photo Tech
>          \/\/\/\/\/\/          http://www.rit.edu/~andpph
> __________|        |_____________________________________
>
>
>
>