Quote:
Originally Posted by dimithri86
Hey Graeme,
How did you get 13 sec single exposure with a dob?
Looks great. Inspired me to try again after the NSW rain clears.
Dimithri.
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Well Dimithri, I have a GOTO dob so I do have tracking. It works well for targets close to an arc between East - West. I can get good exposures out 40 sec at times. An object like the Tarantula nebula has to be a lot shorter as the Alt/Az mount can't follow the field rotation near the SCP.
It hasn't been easy though. I have purchased an ankle exercise weight to strap around the base of the scope to balance the camera. It's worth the effort to level the base too before aligning. You definitely require a dslr with good high ISO and low noise performance. It's rewarding when you do get a great image though!
Cheers
Graeme