I personally like E200 film for it's red sensitivity. I need to try it on the "California nebula" and IC 1396 in Cepheus. My digital camera is essentially blind to the red H-alpha wavelengths. Debbie

From: Patrick Wiggins <paw@trilobyte.net> Date: 2005/09/05 Mon PM 09:18:41 MDT To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Subject: Re: [Utah-astronomy] Tri-X

Chuck Hards wrote:

...

While at the store today, I noticed that good old Tri-X film was still being marketed (for a while, at least). Has anyone ever tried B&W astrophotography from an urban or suburban location, using red filtration? This should have the double advantage of acting as an effective LPR filter, while selectively passing Ha. This used to be done quite a bit in the "old days". Any comments? Patrick?

I tried Tri-X a few times until I found that Plus-X had better reciprocity.

Just the same I don't think I've ever tried shooting through a red filter especially since I eventually settled on Ektachrome 400.

Speaking of film (remember film?) while defrosting my freezer the other day I found bulk rolls of unopened Technical Pan and Ektachrome 400.

Patrick

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