The Astro-Photography Mailing List ... How are all of you doing these various experiments going to quantify your results? Is everyone going to build a...
Jerry Lodriguss
jml@...
Aug 1, 1997 7:24 am
4388
The Astro-Photography Mailing List ... I've found the best type reel to use is the plastic ratchet type. Using this type reel, you feed the front end of the...
Steve Bell
sb635@...
Aug 1, 1997 5:28 am
4389
The Astro-Photography Mailing List ... Jerry, Thanks for your thorough posting. Very interesting. I have checked the sizes of spots in the same fashion. I have...
Peter Ceravolo
ceravolo@...
Aug 1, 1997 7:36 am
4390
The Astro-Photography Mailing List ... A goos tainless steel roll and tank works nicely. I ahve found sometimes there is a difference between brand and...
Joseph O'Neil
joneil@...
Aug 1, 1997 4:05 pm
4391
The Astro-Photography Mailing List ... That's an excellent point! I don't have any spec sheets to help answer that, and I haven't done any scan tests in this...
Tom Krajci
krajcit@...
Aug 1, 1997 2:43 pm
4392
The Astro-Photography Mailing List ... Yes, a key point - and in terms of the attempt to use vacuumised pre-hypering to remove whatever is causing the pressure...
Philip Perkins
philip@...
Aug 1, 1997 9:44 pm
4393
The Astro-Photography Mailing List ... For me, since I don't have a sensitometer, I'm just going to eyeball it. Through experience, I've gotten a good feel for...
Steve Bell
sb635@...
Aug 1, 1997 4:20 pm
4394
The Astro-Photography Mailing List ... Regarding the out gassing Would a test of the effectivness of out gassing be possible? Chuck say the out gassing...
Ian Turner
skyshooter@...
Aug 1, 1997 6:26 pm
4395
The Astro-Photography Mailing List ... Well, I can say that using the exposure control for my $700 Microtek 35t, I can saturate the CCD with the exposure...
Steve Bell
sb635@...
Aug 1, 1997 4:39 pm
4396
... I've got a question, has anyone analyzed the gas in the chamber after hypering? Maybe the H2 is reacting with one or more of the components of the film.You...
bob
renfield@...
Aug 1, 1997 4:28 pm
4397
The Astro-Photography Mailing List ... Oh, certainly, given some certain material that contains some particluar type of gas, certain outgassings can occur at...
Steve Bell
sb635@...
Aug 1, 1997 6:45 pm
4398
The Astro-Photography Mailing List ... I have now tried both experiments as described by Jerry. ... Experiment 1 ... Today I set up Batch 031 - a 'pseudo...
Philip Perkins
philip@...
Aug 2, 1997 3:50 am
4399
The Astro-Photography Mailing List ... Leigh, I use the same plastic tank and I too have had problems but it IS possible to load the 36 lengths of Tech Pan. I...
Randall Rubis
rubis@...
Aug 1, 1997 11:05 pm
4400
The Astro-Photography Mailing List ... Philip, thanks for posting these results, they ARE very interesting! I was just about to do your experiment one, the...
Jerry Lodriguss
jml@...
Aug 1, 1997 11:55 pm
4401
The Astro-Photography Mailing List ... For all LS-1000 Nikon scanner users. Just tried a new trick that worked very well for scanning those hard to scan...
Jerry Lodriguss
jml@...
Aug 2, 1997 12:02 am
4402
The Astro-Photography Mailing List ... Since the pressure was at +3 psi at 48C, and after 4 mins the temp was 50C, the pressure should have gone up some...
Steve Bell
sb635@...
Aug 1, 1997 11:18 pm
4403
The Astro-Photography Mailing List ... Yes, but the point is that if its left in the film layer it expells into the chamber during the early part of hypering...
Philip Perkins
philip@...
Aug 2, 1997 7:06 am
4404
The Astro-Photography Mailing List ... Ok, just for the record to confirm Philips first experiment... I brought my hyper chamber up to 50C and with NO film in...
Jerry Lodriguss
jml@...
Aug 2, 1997 8:41 am
4405
The Astro-Photography Mailing List ... The gas your talking about is under a vacuum or pressure. This will cause the gas to rise in pressure do to heat. As...
Ric L Ecker
rlecker@...
Aug 1, 1997 4:00 am
4406
The Astro-Photography Mailing List ... Oh, I understand the nature of the problem. I just don't think the amount of moisture expelled into the chamber coming...
Steve Bell
sb635@...
Aug 2, 1997 8:05 am
4407
The Astro-Photography Mailing List ... If you rapdily put in the forming gas, which I take it was at room temp (ie, less than 50C) when introduced, and by...
Steve Bell
sb635@...
Aug 2, 1997 8:22 am
4408
The Astro-Photography Mailing List ... By the way, Phillip, your images are absolutely gorgeous! Given your results, I wouldn't think that you would be...
Steve Bell
sb635@...
Aug 2, 1997 8:43 am
4409
The Astro-Photography Mailing List ... Oh, I'm sure the pressure increased, but due to the extremely small volume of gas it wasn't noticeable on the lumicon...
Jerry Lodriguss
jml@...
Aug 2, 1997 9:42 pm
4410
The Astro-Photography Mailing List ... What exactly happens when film is pushed? Suppose that we had an ISO one hundred and two hundred film with nearly...
mark.kaye@...
Aug 2, 1997 10:08 pm
4411
The Astro-Photography Mailing List ... A hearty thanks to everyone who responded. I have been using the P1600 for a couple of years now and it is a great film...
mark.kaye@...
Aug 2, 1997 10:08 pm
4412
The Astro-Photography Mailing List ... I don't know the answer to all your questions, and I'm not sure if the effects are the same with slide film, but in...
Mike Regish
mregish@...
Aug 3, 1997 12:16 am
4413
The Astro-Photography Mailing List ... Trouble with lenses that fast is that they reach sky fog limits fast, too, and you get low contrast. I guess that's a...
Mike Regish
mregish@...
Aug 3, 1997 12:21 am
4414
The Astro-Photography Mailing List ... I ran the simple test on my hypering chamber to verify that the pressure increase is due to heating the gas - it is....
Chuck Vaughn
aa6g@...
Aug 2, 1997 8:44 pm
4415
The Astro-Photography Mailing List ... Philip, ... I think when you say -27 psi you mean -27 inches. The guage is inches on the negative side and psi on the...
Chuck Vaughn
aa6g@...
Aug 2, 1997 9:10 pm
4416
The Astro-Photography Mailing List ... In message <19970801.223925.6654.2.rlecker@...>, Ric L Ecker <rlecker@...> writes ... The increase in pressure...
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