[APML] Emulsions and Focus

["Steve Walters" <swalters@att.net>]

APMLers,

I sent a question to Kodak recently asking the emulsion thickness for TP and
E200. I also asked where the optimal focal point was, at the top or deeper
inside the emulsion. I am trying to refine my knife edge focuser to take
these parameters into consideration.

Attached is their response which you may find interesting. I intend to
calibrate my KE to a point which is 2/3 of a mil above the surface of the
acetate. This should put it in the center of the active emulsion.

Steve...

swalters@att.net
http://astrophoto.home.att.net

----- Original Message -----
From: Kodak <ScientificUS@cyber.kodak.com>
To: Dr. Stephen M. Walters <swalters@att.net>
Sent: Wednesday, May 23, 2001 2:56 PM
Subject: Re: Emulsions (KMM1137210C0KM)


Dr. Stephen Walters,

The rule of thumb is that the emulsion is a mil thick. Focus should be
within the emulsion pack - not right at the top. Of course, the
light-sensitive portion of the emulsion pack is probably about 2/3 of
the total.

Thank you for visiting our Kodak web site.  If you should have any
questions on Kodak products or services, please be sure to revisit our
site as we are continually adding information to enhance our service.

Peter Hamann
Kodak Information Center (USA)
Kodak Professional

800 Lee Road Door C
Rochester, NY  14650-3109

1-800-242-2424  ext. 19 (Monday-Friday, 9am-7pm EST)
http://www.kodak.com/go/professional




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