RE: Medium format (was: plastic sheets

["Michael Dziak" <fetch_the_ball@xxxxxxx>]

Sorry, I didn't ask about 4X5.  I do most of my infrared in 120 Konica, so I 
didn't inquire further.
Mike Dziak

- ----------
From: 	owner-infrared@xxxxx on behalf of Willem-Jan Markerink
Sent: 	Saturday, July 05, 1997 5:48 PM
To: 	infrared@xxxxx
Subject: 	RE: Medium format (was: plastic sheets

On  5 Jul 97 at 15:10, Michael Dziak wrote:

> Ilford SFX200 is definitely going to be available soon for 120.  I was at a  

> Ilford seminar for photography teachers last weekend where Wendy Erickson 
said 
> they were testing the SFX 200 in 120.  She did not say when it would be 
> available.  

Thanks for this interesting update!
Did you interrogate them about large format as well?....;-))

> I,ve shot 2 rolls of the 35mm version with a #29 filter.  You 
> could not tell it from ordinary panchromatic film with that filter..  Ilford 

> says you need the B&W #92 infrared filter to get the right result.  The 
> problem with that filter is its so dark you must use a tripod and zone 
focus, 
> or focus then put on the filter to shoot.  I'll let you know what I find 
next 
> week.

Well, although I disagree that this color is soo hard to use: oddly
enough this problem is an argument in favor of AF, as most AF
systems work more than fine even through opaque filters like #87C. 
To get the IR-focus shift right after AF, the EOS USM/FT-M lenses are 
perfect....;-))

As an BTFR filter (Between The Film Rails....:-)) I have been trying
to find a thin non-gelatine foil quality of this #89B, but sofar no
luck. Kodak doesn't even sell #89B in gelatine anymore AFAIK, but I
still have a source for this color in gelatine (and many other
colors as well). Still want something more robust than gelatine.

Are there any others interested in a thin #89B quality for this BTFR
application?
Main problem might be that I end up with a rigid quality, not as easy 
to cut as flexible foil. And a BTFR filter requires a very exact size 
to work properly, without light leaking.


- -- 
Bye,

Willem-Jan Markerink


      The desire to understand 
is sometimes far less intelligent than
     the inability to understand


<w.j.markerink@xxxxx>
[note: 'a-one' & 'en-el'!]
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