Re: Starshoot /Focal Reducer
- http://starizona.com/acb/ccd/calc_pixel.aspx will calculate field angle if you enter the correct Starshoot and the resultant focal length for various focal reducer ratios on your ETX-105. Results are approximate considering the uncertain position of the main mirror when focused.
--- In ETXASTRO@yahoogroups.com, "Bob" <bobden72@...> wrote:
> Thanks to those who gave suggestions all took on board. The main cause of frustration was of my own making. I did not appreciate the small field of vision while using the Starshoot. Also I was a bit over zealous with the focus control. I have since found that with the Starshoot fitted the focal point is near the end stop, of my Meade 1244 electric focuser. I have since modified the mounting plate on the focuser, by making a new one but thinner by 3/16" giving more in control.
> Since the last message I have bought a .5 focal reducer, so I can image more of the moon. So to date I have taken some pictures of the Moon and Saturn, and all is progressing.
> What size focal reducer do you think I will need to get the whole of the moon in with my ETX105?
> I have put a picture in the photo section of the new thinner backing plate under bobs bits.
> Regards Bob