Hi James. As far as I recall, the DS-114 is an alt-az design, with a computersimulated equatorial funcion? If so you will experience field rotation, when doing...
hrjo@...
Apr 1, 2000 9:33 am
31300
... The solar system is a dusty place and this dust can be seen in two forms, Zodiacal Light and Gegenschein. Gegenschein is German for counter glow. With...
Mark Kaye
mark.kaye@...
Apr 1, 2000 3:08 pm
31301
... Significant vignetting. We have a good quality 2X converter and it vignetts gang busters. I would say that it is due to both the field of the doubling...
Mark Kaye
mark.kaye@...
Apr 1, 2000 3:20 pm
31302
I already checked B&H plus a few other used photo eqipment sources. What I've bid would be a good deal if I get it, but I probably won't go much higher. ... ...
Michael Matassa
mj1_astrosys@...
Apr 1, 2000 3:33 pm
31303
Thanks for your input, Mark. I've pretty much decided to stay away from the tele extender and either make do with what I have or pick up a used telephoto if I...
Michael Matassa
mj1_astrosys@...
Apr 1, 2000 3:37 pm
31304
Mike, I will do as you request..but visually the background on the slides is not bright, actually I think it could take another 30-60 minutes. There is a...
Herm
hermperez@...
Apr 1, 2000 9:50 pm
31305
Is the scope really an F4? Is that including any obstruction in the path? Even a 90min F/8 exposure on E200 with the Tokai shows enough background to see the...
Mike Cook, AF9Y
mwcook@...
Apr 2, 2000 1:14 am
31306
Hi Guys, Here is a shot of IC443/444 at f/8. A composite of two 50 minute exposures on unhypered PPF for a comparison. http://www.psln.com/dickman/ic443.htm ...
Russ Dickman
dickman@...
Apr 2, 2000 1:39 am
31307
The Astro-Photography Mailing List ... Here's a composite of two 2 hour shots of M97 and M108 taken this week: http://www.webcom.com/af9y/m97.htm (no short...
Mike Cook, AF9Y
mwcook@...
Apr 2, 2000 5:35 am
31308
The Astro-Photography Mailing List ... Nice work Mike! I like the star color. I've always enjoyed this particular pair of objects. I'm going to shoot them...
r u s s d i c k m a n
dickman@...
Apr 2, 2000 6:06 am
31309
Hi Mike, I like your image of the Rosette but was wondering if the baby-blue cast to the stars was caused by the Tokai LPF or image processing? I could not...
Alan Brent Jordan
aljordan@...
Apr 2, 2000 3:58 pm
31310
Hi Mike, I took a couple more images last night, a 60min shot (interrupted by a park ranger that drove by and a 35min shot interrupted by Gemini getting low on...
Herm
hermperez@...
Apr 2, 2000 4:41 pm
31311
I've tried to make sure that the star colors are real. Long exposures will saturate the stars to white and that is what we all have become accustom to seeing....
Mike Cook, AF9Y
mwcook@...
Apr 2, 2000 5:05 pm
31312
Mike, I took the readings you requested the interframe dark strip: 14 20 20 dark portion of slide: 16 31 71 bright portion of nebula: 101 45 89 What does this...
Herm
hermperez@...
Apr 2, 2000 5:33 pm
31313
I just realized the big Vixen coma corrector is threaded for 48mm filters..it does have a wider threaded area for a bigger filter also.. I was worried I would ...
Herm
hermperez@...
Apr 2, 2000 6:15 pm
31314
... -snip- i've seen two int he Vixen catalog. one is 43mm, and another is 60mm. this is in addition to the 36.4mm adaptor. Trying to get Orion to get one...
Joseph O'Neil
joneil@...
Apr 2, 2000 6:41 pm
31315
Joe, please let us know what you find out..I need one for Konica and one for Nikon. Herm ... -- APML Archives at <http://www.system.missouri.edu/apml/> --- ...
Herm
hermperez@...
Apr 2, 2000 6:49 pm
31316
The Astro-Photography Mailing List ... Dar Mike, This a very nice shot. Regards. Alfredo Martin Navarro mi sitio en la web es: http://www.a-navarro.com.ar mi...
Alfredo Navarro
anavarro@...
Apr 2, 2000 7:08 pm
31317
Assuming your scanner has an accurate output for black, it appears that that pushing the film has shifted the color balance. I would start by shifting the...
Mike Cook, AF9Y
mwcook@...
Apr 2, 2000 7:09 pm
31318
Jason, Thanks for the alert. I did post it to the wrong server. Here it is again: Here's a composite of two 2 hour shots of M97 and M108 taken this week: ...
Mike Cook, AF9Y
mwcook@...
Apr 2, 2000 7:16 pm
31319
... F1.4 is near enough to three stops from f4 as to not be a quibble. Certainly at night, accounting for reciprocity failure, a three stop difference is what...
Mark Kaye
mark.kaye@...
Apr 2, 2000 7:23 pm
31320
No, I have not..I still have not developed the roll from last night, perhaps I should try 1 stop push? (its hard to give up 3 stop push cold turkey). Herm ... ...
Herm
hermperez@...
Apr 2, 2000 7:29 pm
31321
Give it all up!! I think the pushing is most likely causing your problem. It might be that the developer is not doing it right. I could see no improvement in...
Mike Cook, AF9Y
mwcook@...
Apr 2, 2000 7:41 pm
31322
I'm sure that the Tokai does not require a 3 stop increase. Mark is most likely correct in that a sensitive wavelength(s) for the light meter is in one of the...
Mike Cook, AF9Y
mwcook@...
Apr 2, 2000 7:41 pm
31323
You might check with Markus Ludes. That's how I got mine. Bobby Middleton http://www.koyote.com/users/bobm/word.htm ... From: Herm <hermperez@...>...
Bobby Middleton
bobm@...
Apr 2, 2000 8:16 pm
31324
Hello, I own a home built 8" F5.95 newtonian reflector with a very good old Parks mirror. I would like to turn it into a photographic scope so I can shoot a...
Alan Brent Jordan
aljordan@...
Apr 2, 2000 9:38 pm
31325
Hi Alan, See responses below. ... You could replace the tube, but I bet if you used an off axis guider, that would take care of the problem. How much...
Stosh
stosh@...
Apr 2, 2000 9:50 pm
31326
... From: Alan Brent Jordan ... Aluminum irrigatgion tubes, or go here to look at very nice Parks fiberglass: http://www.pocmtnop.com/west/parksoptical.html ...
Bobby Middleton
bobm@...
Apr 2, 2000 10:20 pm
31327
From: Herm <hermperez@...> ... It was meant for both visual use and photographic use, hence the "multipurpose"...as opposed to the Lumicon...
Tom & Lou Krajci
krajcit@...
Apr 2, 2000 11:31 pm
31328
Mike, Really nice shot! And thanks for the info you posted on shooting E200. I finally got around to shooting my first roll on Saturday night. Information...
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