ICEINSPACE
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Moon Phase
CURRENT MOON
Waxing Gibbous 80%
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16-09-2018, 11:58 AM
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Registered User
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Join Date: Dec 2016
Location: Ocean Reef, Western Australia
Posts: 105
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Filter for Planetary AP?
Seeking a bit of advice.
I finally managed to get my ASI120mm-c going last night and captured some great moon shots (figured I'd go for something big and obvious!!). While my Deep Sky AP is pretty good, I am still working through the best approach to planetary photography.
On to my question; when I slewed over to Jupiter, try as I might, the image was blown out as it was too bright. I suspect therefore I need a decent filter to assist me.
What do folks recommend for planetary work?
P.S. I wasn't sure where to post this as the beginners AP sub-board seemed to be more about feedback on shots taken. Apologies if I have posted in the wrong forum.
Pete
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16-09-2018, 01:41 PM
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Registered User
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Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 832
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Peter,
I still do my planetary imaging with a ASI120 and Jupiter is barely bright enough when the image scale is right for exposures of around 12ms. And that is not scope dependent. Because you are imaging without RGB filters you would have to drop the exposure time to perhaps 4ms, at the optimum image scale.
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16-09-2018, 02:32 PM
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Registered User
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Join Date: Dec 2016
Location: Ocean Reef, Western Australia
Posts: 105
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Thanks Stef.
Indeed, the 120mm-c is the colour version. Do you use any UV/IR filter (given you are using monochrome, I suspect not).
Pete
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16-09-2018, 03:03 PM
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Registered User
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Join Date: Jul 2013
Location: Melbourne, VIC
Posts: 832
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I actually assumed you were using the monochrome version. In that case your optimum exposures should be very similar to mine.
I do not need separate IR/UV block filters because those coatings have been applied to each of my Astrodon RGB set.
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16-09-2018, 04:17 PM
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Registered User
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Join Date: Dec 2016
Location: Ocean Reef, Western Australia
Posts: 105
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Thanks Stef.
My CCD is mono and I use a range of filters for that, but I thought I would go an entry-level colour ASI cam for planetary - to dip the toe in the water.
I will give it a go (typically, the clouds are rolling in here in WA as the afternoon wears on!!).
Pete
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16-09-2018, 07:05 PM
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Lost in Space ....
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Join Date: May 2010
Location: Auckland, NZ
Posts: 4,949
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Planetary is best done with a colour camera, just tweak the gain and exposure time down to get the right exposure. Best with colour because by the time you've gone through the RGB set for mono the planet has turned enough to misalign everything, Jupiter in particular but also Mars.
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16-09-2018, 08:51 PM
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Registered User
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Join Date: Dec 2016
Location: Ocean Reef, Western Australia
Posts: 105
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Thanks Brent, glad I went for colour for planetary work!
Pete
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