Always wanted a go at the Red Rec (F12.3) as it is so unusually symmetrical with central star mag9.0, in Ha it should show its full size but Mintron was not sensitive enough with Ha or IR filters to show anything as it really needs a 16bit cooled CCD and longer exposure to develop this to its fullest.
Ghost of Jupiter (F16.3)came out well as this is a really big bright planetary, does not resemble Jupiter but does resemble the Blue Snowball in Andromeda.
Had another go at the extremely bright Spirograph (F29) in Lepus this time at a 10meter long fl showing the slightly broken ends of the ellipse shape.
Thanks everyone, the first two images use full exposure of 2.56sec and I use 500 for luminance and 150 for rgb each but the red rec had 400 for each colour. Spirograph was so bright I used 0.64 sec exposures.
When its breezy I throw away the breeze damaged stars and keep the nice round ones using Registax. I need a dark frame as there are many hot pixels which are completely removed by Registax.
Are these single frame screen grabs or are they stacked images of several frames?
Quote:
Originally Posted by John Hothersall
Thanks everyone, the first two images use full exposure of 2.56sec and I use 500 for luminance and 150 for rgb each but the red rec had 400 for each colour. Spirograph was so bright I used 0.64 sec exposures.
When its breezy I throw away the breeze damaged stars and keep the nice round ones using Registax. I need a dark frame as there are many hot pixels which are completely removed by Registax.
John.
So I take it that they are stacked frames.
Do you get good live images of them from your location with the Gstar-ex? (not stacked frames, just raw live image).
Sorry - yes they are stacked and several hundred will create a decent image but a thousand or more really looks a lot better especially for fainter objects. The CCD can be used like an eyepiece it is supposed to be 5 times more sensitive than the naked eye and at F4.5 will show galaxies/nebula at 2.56sec exposure, the Watec is suppoed to be better at 10sec exposure though. Mintron/GStar-Ex uses same sensor as Lodestar guide CCD.
The avi for some bright objects look pretty good with breeze movement every now and again, M42 trapezium was very bright in red but fuzzy in green and blue. Ghost of Jupiter and Spirograph were very bright, sometimes you can see the seeing fuzz the image now and again especially with long exposure of 2.5secs.
