Jostein, Congratulations! You've got a very fine scope there, optically. One quote I found on it says: This refractor was designed with astrophotography in mind, it is a Petzval design producing a very flat field. Also, they were never imported to the U.S. so are prized here.
I'm curious what eyepieces you got with it? (Brand and focal length) I can't answer your question directly, but pics would help and I'd recommend asking in an astronomy/astrophotography forum. I'd recommend a European forum, since most of the scopes were sold there. In general, equatorial mounts were often sold with RA (right ascention) motors only, or with a two-motor set-up with a motor also on the declination drive. I'm guessing that the threaded holes are, as you suspect, for the optional dec drive but not sure what "off the shelf" model would bolt on there. In any event, if you have the scope/mount properly polar aligned, the dec motor would not normally be needed for visual use, while the RA motor works to keep things in view as the earth turns beneath the night sky. On Wed, Jun 6, 2012 at 3:08 PM, AlunFoto <[email protected]> wrote: > A couple of weeks ago I got a cellphone text from a relative, whose in-law > family had decided to donate a telescope to a more interested owner. Since > the brand name on said piece of equipment was Pentax, they thought of me. > So now I'm the happy if somewhat incredulous owner of a Pentax-75 EDHF > Refracting Telescope with all original parts, including an equatorial mount I > have spent two days figuring out how to align and operate. > I've enjoyed the process, and have noticed a pair of threaded holes near the > declination screw that makes me wonder if a stepper engine can be fitted to > it, like the offerings from Celestron, for example. Does anyone know if this > can be done? > > Jostein > -- > sent by K9-mail from my cellphone > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
