CSM
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Status Updates posted by CSM
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Hi Chris
Tomorrow I should get a ZWO ADC and no doubt that will create clouds. But have you any tips regarding the use of these? Am hoping to do Jupiter, Mars and Saturn. I've a Celestron 9.25 AVX and the ZWO ASIMC120-S which gives me quite good images but I think I can do better!
Regards
Colin
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Hi Colin,
This page is a great reference for ADCs:
http://skyinspector.co.uk/atm-dispersion-corrector--adc
Once you have inserted the ADC into the image chain and the levers are together parallel to the ground, you need to open them up slowly until the red and the blue fringes on the planet vanish. If you open them too far then the red and blue fringes will swap positions. Note the planet will shift around on the sensor when you adjust the levers which can be a bit of a pain.
Once you get the hang of it should really improve your images. That is assuming the cloud ever clears...
Regards,
Chris
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Hi Chris,
Yes - I had read through Martin's spiel and am still just a little confused, particularly about the bit getting the levers parallel to the ground no matter how many times I read through that. I usually image with the diagonal in place and the cardboard method seems a bit impractical, especially with a dew shield in place. So any suggestions for that.
Also, it is only on the rare occasions that I have used a 3xBarlow - have the Meade Shorty - as conditions are seldom good enough. But as the ADC is supposed to work best at f 30 - 40 would that Barlow be good enough? Or maybe I should invest in another, better Barlow - a 3x TV Barlow (have 2xTVBarlow)?
Do you do the prism adjustments on a nearby star rather than on the planet? Regulus is near Jupiter so I was thinking maybe do it on that first?
By the way, free airmail from China took from Friday to Monday!
Regards
Colin
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