Re: Time to get a Focuser
- Mark Acker wrote:
> The Ballerophon [...], but Mike, didn't you have to brace it a bit on theHi, Mark. Yes, I bolted the Bellerophon to the rear casting of my C9.25
> back of your scope? I actually spoke to you about this a couple of
> years or so ago and thought I remembered some photos where you
> essentially bolted it to the back of the scope to sort out some
SCT. I don't know if this was necessary, but I didn't like the idea of
sll that weight hanging off the SCT threaded connector that was directly
connected to the central tube holding the primary mirror.
When I was done, the Bellerophon was securely bolted to the scope, and
the central tube made no contact with it at all. I fashioned a light
shield to cover the gap between the two.
Louisa County, Virginia USA N37.58.23 W77.56.24
- I have a Moonlight (www.focuser.com) stepper-motor focuser for my Televue NP127is and SBIG ST2000XM. I use it with MaximDL and FocusMax. Once I figured out how to use FMax, it has performed excellently. I now have a new SBIG STT8300 with filter wheel coming and am looking forward to trying that bad boy out! Just need some clear skies here in Seattle!
--- In email@example.com, "nicotewarren" wrote:
> I just got a bonus at work and I want to buy a motorized focuser. I'd like to get opinions from the group on what people have experienced.
> All I do is imaging - no visual observing. I have a Stellarvue 105 APO on a CGEM mount and I guide through the Orion Awesome Guide Package. My OTA has a 2" Featherlight focuser. I use MsxIm DL for all the control of my QSI 583 CCD and have recently been considering session automation software like CCD Commander (no decision yet). I have a permanent pier and keep everything snug in a Motel o'Scope from Dan's Piers.
> I want a focusing solution that will achieve excellent focus in my images throughout an entire night's imaging session. Most of my filters are parafocal - but not all. So the solution must be automate-able in MaxIm DL. Here in Texas we also get a wide range of temperatures in an evening (as much as 30 degF swing) so regular refocus is a good plan.
> Travel on my Featherlight is an issue - I only have about 2 inches. Current payload on the drawtube is a field flatner and the QSI 583.
> I'm a big fan of Ron's book. In it, he talks about a few types of motorized focus solutions and I've been researching them looking for the specs he mentions (min step distance, encoding ability, backlash to name a few). Few of the options give specs.
> I'm eyeing the following:
> Technical Inovation's RoboFocus
> Starzona's MicroTouch
> Rigel System's cFOCUS
> Finger Lake's DF-2 (very expensive relative to others)
> Anyone have a setup similar to mine that owns one of these? What's been your experience?