The Astro-Photography Mailing List ... Does anyone know how this formula relates to ASA? Thanks, Jed. ... From: Tom Krajci...
Jed Glover
Jed.Glover@...
Jul 1, 1997 3:05 pm
3943
The Astro-Photography Mailing List ... I have been trying out my ST-4 over the weekend, and found that it is much easier to use with the laptop connected and...
Jed Glover
Jed.Glover@...
Jul 1, 1997 3:07 pm
3944
The Astro-Photography Mailing List ... a ... know ... The SBIG program CCD.EXE is the image acquisition and processing program for the ST-4 and does not have...
Steve Bell
sb635@...
Jul 1, 1997 9:10 pm
3945
The Astro-Photography Mailing List ... Are more teeth better on the RA gear? I just got the Mototrak IV for my new scope and when I went to set up the dip...
Mike Regish
mregish@...
Jul 2, 1997 12:55 am
3946
The Astro-Photography Mailing List ... I think there was only one drive Meade put on the older large (1.5" axes) GEM, and it had 144 teeth. If your RA gear has...
Steve Bell
sb635@...
Jul 2, 1997 5:35 pm
3947
The Astro-Photography Mailing List ... Yes, it's true, Hubble's images are often a compositation of several exposures. I think that is not a matter of pointing...
Alessandro Vannini
a.vannini@...
Jul 2, 1997 8:03 pm
3948
The Astro-Photography Mailing List ... I'll take only one, instead. I need some money to refit my deep-space ship's warp engine... :-))) ... JonVon << Trust no...
Alessandro Vannini
a.vannini@...
Jul 2, 1997 8:16 pm
3949
The Astro-Photography Mailing List ... I know what you're getting at here Steve, but to us machinist types "less tolerance" means more accuracy :) For example,...
Peter Drumm
pdrumm@...
Jul 2, 1997 11:37 pm
3950
The Astro-Photography Mailing List ... I'm basically wondering if the slower period of the 100 tooth worm gear is an advantage to the drive or not. My Ultima 8...
Mike Regish
mregish@...
Jul 3, 1997 12:22 am
3951
The Astro-Photography Mailing List ... I have a couple of new photos of a couple objects taken on the night of July 1 - 2. Both photos were taken with my AP...
Chuck Vaughn
aa6g@...
Jul 3, 1997 3:29 am
3952
The Astro-Photography Mailing List ... The periodic error is on the worm or drive gear only, not the large RA gear. I would think that a large finer mesh gear...
Ric L Ecker
rlecker@...
Jul 3, 1997 11:00 am
3953
The Astro-Photography Mailing List...
Mike Regish
mregish@...
Jul 3, 1997 11:36 am
3954
The Astro-Photography Mailing List ... This is what I figure too. At least *most* of the periodic error is in the worm. And whatever is in the RA gear has a...
Mike Regish
mregish@...
Jul 3, 1997 12:02 pm
3955
The Astro-Photography Mailing List ... Nice shots!!!!!...
Patrick Rauls
prauls@...
Jul 3, 1997 12:29 pm
3956
The Astro-Photography Mailing List ... I am using a 10" lx200 f/10 (2500fl) for prime focus photography. I have the Meade off-axis guider and the 9mm ill....
BOB MIDDLETON
bwmj@...
Jul 3, 1997 1:50 pm
3957
The Astro-Photography Mailing List ... Mike, ... The Snake Nebula is at RA 17h23m and Dec -23.6 deg in Ophiuchus. Chuck <aa6g@...>...
Chuck Vaughn
aa6g@...
Jul 3, 1997 2:49 pm
3958
The Astro-Photography Mailing List ... I'd say do it unless seeing is too bad. I used to guide my C14 off-axis with a GEG at 585X for all photos. I used a 1.8...
Chuck Vaughn
aa6g@...
Jul 3, 1997 3:41 pm
3959
The Astro-Photography Mailing List ... In actuality, if the milling defect were to occurr on every tooth of the gear, a periodic error from the gear would...
Steve Bell
sb635@...
Jul 3, 1997 3:47 pm
3960
The Astro-Photography Mailing List ... B72 is a dark nebula. It shows on Uranometria charts but not Tirion's Sky Atlas 2000. I think it's in north east...
Tom Krajci
krajcit@...
Jul 3, 1997 3:56 pm
3961
The Astro-Photography Mailing List ... I would think it would be the more teeth the longer time for large gear perodic error. ric ecker co-pres. of OPTAS OPTAS...
Ric L Ecker
rlecker@...
Jul 3, 1997 11:56 pm
3962
The Astro-Photography Mailing List ... The "large" or RA gear (if that's the one you're referring to) goes around once every 24 hours no matter how many teeth...
Mike Regish
mregish@...
Jul 4, 1997 1:59 am
3963
The Astro-Photography Mailing List ... Just a comment on how i reduced (not eliminated)the PE on my mount. A machinist friend of mine here who made my gear and...
Mark Bolton
bortech@...
Jul 4, 1997 10:50 am
3964
The Astro-Photography Mailing List ... I had a 2nd successful night of astrophotography this week. One of the images is of the IC1318, the Gamma Cygni...
Chuck Vaughn
aa6g@...
Jul 6, 1997 2:38 am
3965
The Astro-Photography Mailing List ... Guiding tolerance for most color film is about 4 seconds of arc according to "Astrophotography for the Amateur" by...
cvedeler@...
Jul 6, 1997 5:53 am
3966
The Astro-Photography Mailing List ... Terriffic stuff Chuck! I especially like B84, it reminds me of the Shadows in B5. Looks like you had a night of decent...
Jerry Lodriguss
jml@...
Jul 6, 1997 9:54 am
3967
The Astro-Photography Mailing List ... Dear friends: I've found at last a way of safely sending my astrophotos to a photolab for reprinting without caring for...
Claudio Lanciotti
lop1686@...
Jul 6, 1997 11:09 pm
3968
The Astro-Photography Mailing List ... This film is available in 36ers as Vericolor SO-279 slide film. Clear skies! MK http://www3.sympatico.ca/mark.kaye/...
mark.kaye@...
Jul 6, 1997 6:03 pm
3969
The Astro-Photography Mailing List ... I have a Cygnus picture too! :-) Jerry, Chuck, and everyone is reading: can you take a look to a wide-field picture of...
Alessandro Vannini
a.vannini@...
Jul 7, 1997 3:06 am
3970
The Astro-Photography Mailing List ... Not too shabby at all! Nice picture. I shot some this past weekend on Ektachrome P1600 at ISO 1600 that I hope will be...
Robert Reeves
rreeves@...
Jul 7, 1997 2:05 pm
3971
The Astro-Photography Mailing List ... Hi, have just read the term *Hartmann mask* in the context of focusing. Can anybody explain me what this device is? Is...
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