More Omega Cent

Glenhuon (Bill) · #1 02-03-2008, 11:13 AM

Another try at Omega Cent last night, seeing wasn't great but worth a try. DSI through 150 newt, 30 secs and processed a bit in nebulosity and PSP7.
Definitely need to fit the 10:1 crayford, getting focus with the R&P is too hard.

peter_4059 (Peter) · #2 02-03-2008, 11:46 AM

Nice Omega Cent image - plenty of stars. I had a go at tri-colour imaging this last night for the first time with the DSI IIpro.

In terms of the focuser you should have a look at getting a motor focuser even with the Crayford as it allows you to avoid wobbling the OTA. You won't look back!

Peter

Glenhuon (Bill) · #3 02-03-2008, 12:10 PM

Thanks Peter, the time spent on drift alignment is starting to pay off, getting longer exposures.
I'm working on a moto focus at the moment, got it stepping, just need to work out the wiring for the reverse switch.
The crayford is for a 200mm scope so I'll have to make an adapter plate to suit the 150. Then its on to the moto focus.

Bill

peter_4059 (Peter) · #4 02-03-2008, 12:15 PM

I retrofitted the Orion Swellfocus motor to my GSO crayford. It's a bit agricultural but works fine. I recently lashed out and got a FCUSB from Shoestring Astronomy to allow better control of the motor speed and pulse length as well as focus control from the laptop. This is now a great combination with very fine focus control.