Greer's design is excellent, using a push-only system, against a resiliant backstop. The spring-loaded setup was introduced to keep people from having to loosen an opposing screw before tightening another- as in the old Novak design. It was a hassle to collimate the Novaks, but they did hold collimation better than the spring-loaded system. I still use the Novak design on several scopes. On Mon, Apr 21, 2008 at 6:16 PM, Canopus56 <canopus56@yahoo.com> wrote:
Chuck wrote:
Kurt, Bryan Greer (Protostar) may have the secondary holder you are looking for. http://www.fpi-protostar.com/
That looks like a good upgrade for a secondary. I'm really focused (there's that pun again) on trying to find a spring loaded knob that I can adapt instead of having three spring loaded Allen bolts in the secondary mirror.
I'm finding that when hauling around the Newt, it's the secondary mirror that is getting jolted out of alignment by the potholes, not the primary mirror. Rather than having to futz with Allen wrenches during a twilight setup, I'd really like to end up with somekind of quickly adjustable knob. I haven't been able to find any small knob with a bolt long enough to reach through the secondary mirror holder body and reach the pyrex assembly.