Re: Slide Dup for *ist D

[William M Kane]

Extension needed is very little.  Any more than 12 mm and it racks out  
of focus . . .
On Thursday, March 18, 2004, at 06:51 PM, J. C. O'Connell wrote:

get a bellows then you have adjustable magnification.
jco
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   J.C. O'Connell   mailto:[EMAIL PROTECTED]   http://jcoconnell.com
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-----Original Message-----
From: William Robb [mailto:[EMAIL PROTECTED]
Sent: Thursday, March 18, 2004 7:29 PM
To: [EMAIL PROTECTED]
Subject: Re: Slide Dup for *ist D


----- Original Message -----
From: "William M Kane"
Subject: Slide Dup for *ist D

Hey all,

    Just received my Slide Holder 1x . K from eBay . . . the seller
has
more (or at least I saw another listed by him) . . . very nice
purchase
. . . brand new in the box,  it even had the plastic bag around it
still!
    Anyhow, as I am looking through this I'm imagining there is a
good
chance that this item could be used on the *ist D as a slide copier
. .
. Basically here's the setup:

Camera + 12 mm extension + Reverse Adapter K 52mm + Slide Holder 1x
K
This gives you a mag of 1.00 on a 35 mm system.

Unfortunately we need a lower magnification, and my mind isn't
working
too well right now . . . I figure we either need a lower mag lens
or
higher mag lens, but can't get my brain around the reversed lens .
. .
do we want a 35 mm or an 85 mm lens reversed?  I don't have either
in
the 52 mm filter range . . .

So for all you math/lens majors, what lens do we need?
I am pretty sure you are going to need a combination of a longer
focal length lens, and more lens extension from both the camera and
the slide.
I still haven't managed a good slide duping system for the ist D, so
if you could report on your experimrnts that would be grand. You
could probably use a step down ring on the reverse adaptor and take
the lens down to 49mm. If there is a bit of vignetting, it isn't
going to matter much, as the format will still be inside the
projected circle.
William Robb

William Robb