On 1 Mar 2003, at 7:34, Brooke Clarke wrote: > Hi Rainer: > > I have done some analysis of the Mintron 12V1C-EX (StellaCam EX) in terms of its light sensivity. > <http://www.pacificsites.com/~brooke/Mag.shtml> Thank you very much. I saw your page before I bought the Mintron. Your results convinced me (among others) that the Mintron would be a good instrument. > But the thing that bothered me about using the integration mode on a fast moving sat was that if the sat changed pixels then the > integration would make the image dimmer. Or does it just reduce the contrast? > I see many leo satellites as short streaks moving through the fov. Very fast satellites should appear as dotted lines, but I have not seen this until now. > Have you tried different integration times? yes, I push the integration until the sky gets too bright and then go back one step. > > A 75 mm f1.3 lens is 75/1.3 = 57.7 mm objective diameter and according to the table on my web page should see MAG 9.5 with no integration. > > It's interesting that the 82mm/f1.6 = 51.3 mm OD is not as good a lens. > > How do you point the camera? first sighting along the body of the Mintron to get a bright star and then starhopping. The Mintron is mounted on a simple camera tripod. > > What is a 1004a? Willie's camera (1004x), perhaps the 1004x JG CCD ASTRO CAMERA? > > Thanks, > > Brooke Clarke, N6GCE > 123.164041W 39.190192N > > Rainer Kracht Elmshorn, Germany Station 5005 53.7695N 9.6626E 9m Potsdam Datum 53.7679N 9.6614E 47m WGS84 R.Kracht@t-online.de ----------------------------------------------------------------- To unsubscribe from SeeSat-L, send a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@satobs.org List archived at http://www.satobs.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Sat Mar 01 2003 - 12:36:16 EST