Image of the day

With one of the several on line eyepiece calculators I came up with 652x with a .08 degree true field of view (assuming 50 degree apparent FOV). Now this is where my math gets fuzzy :S , I think that equals about 29 seconds of arc true field???

So if I'm right wink

, that would put you somewhere around 15-20 seconds of arc PE which is about normal.

Robert W.

September 22, 2004 11:25 PM Forum: Film Astrophotography - Imaging and Processing

focuss??

Posted By Robert Watters

The only thing that comes to mind is if you are not using some sort of dew shield then perhaps the lens dewed over. Hard to tell without a pic. smile

Robert W.

October 1, 2004 11:24 PM Forum: Film Astrophotography - Imaging and Processing

NGC 1499 or California Nebula " Larger " ??

Posted By Robert Watters

Nice, the detail is much easier to see.
You need to trade that 2.7" stuff in for the 4". wink

Robert W.

October 4, 2004 11:19 PM Forum: Telescope Making

large rotating rings

Posted By Robert Watters

Parallax Instruments makes standard rings for up to 26.4" tube diameters and rotating for up to 19". You need to contact them for larger sizes.

http://www.parallaxinstruments.com/ring.htm#TOA130

Robert W.

October 17, 2004 04:08 AM Forum: Film Astrophotography - Imaging and Processing