Quote:
Originally Posted by g__day
Jase -
I did it a crude way - both axes at once, pointing South East at 45 degrees - and got 900 second unguided images as an end result and spot on pointing.
|
But what more do you want Matt? 15mins unguided with pin point stars is nothing to be laughed at. You'd probably get 20 or 30 mins from this level of alignment when guiding. May show slight field rotation for the latter duration, but how many times are you going to go over 20 min subs. For a uncooled DSLR, I'd say never. The noise would be too great. For a cooled CCD camera with a 3nm or 6nm Ha filter, I'd say its a likely possibility.
Seriously, there comes a time when close enough is near enough for the type of work you are performing. It great to strive for perfection, but when you start tearing your hair out, you know you've taken it too far.
Quote:
Originally Posted by g__day
Too I tried PEMPro V2 and found its drift align gave me wierd behaviour and instructions - most likely because 1) it can't tell ASCOM to halt tracking for 15 seconds to get scale right on my mount (why it doesn't just pulse guide to slow RA to 0 is beyond me) and 2) I didn't compensate for this limitation correctly!
MaximDL I think can drift align to - I'm still investigating!
|
Thats not a problem with PEMPro. If ASCOM can't stop the mount tracking automatically, you can simply stop it manually via the hand controller/paddle. In fact, the PEMPro instructions tell you to do this. Place the mount in terrestrial mode or similar will do the trick. If calculating the scale is all you need you can do this with some simple math, you don't need to let PEMPro do it. Follow the wizard for instructions -
http://www.siriusimaging.com/Help/PE...lignwizard.htm
Yes, you can drift align with MaximDL, CCDSoft etc etc, any program that will log guiding corrections will work. See my previous post to Fahim.