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 Post subject: From yesterday...
PostPosted: Sun Oct 07, 2012 5:48 pm 
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Joined: Sun May 25, 2008 12:48 pm
Posts: 7999
Location: UK
Not the most original title I know, but that's how I felt at the time too.

Canon 450D all filters removed.
Sigma 120-300 f/2.8 OS at 300mm f/2.8.
Astronomik CLS-CCD.
EQ6 guided.
Processing with flats in PixInsight+PSE.

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32x2m subs.

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19x2m subs.

It wasn't looking clear, so I didn't set up early. But it did clear up and looked too good to waste, and I was running by 10pm. My previous plan was to get some extra data on the Veil, but with a new CLS-CCD filter I had to try that out. It's more suited to broader spectrum subjects, so I revisited Andromeda and also took a quick shot at Pleiades. Neither have enough data so the noise floor is relatively high. Also the Andromeda set isn't great as I had uncorrected focus shift since I didn't pre-cool the lens enough before using it. I used the modified 450D with the new filter to gain more red sensitivity, however I suspect its noise floor is higher than the unmodified 600D (with old filter) I used previously on Andromeda. Also I think the two data sets might be too different to combine to see if I can get more information out of it. Everything was covered in dew and I packed up just after midnight.

There's lots that can be improved in the above, but as long as I don't look at Bob's previous attempts I might just get away with it :)

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DMK41, Baader CaK filter. No flats, 2 frame mosaic.

And finally, one from earlier in the day. I had another go at the sun with CaK filter which I had limited success with previously. This time I tried using the SkyWatcher ST120 scope, and could improvise some ND5 solar film into the reduced aperture mask on the cap. This gave sharper output than I ever got before once I tilted it slightly to prevent internal reflections. I thought this was going too well, so I got the last scrap of solar film to make an almost full aperture mask... that was far lower contrast and I couldn't tell if the resolution was improved at all or not. I suspect there were too many internal reflections to manage without making a better filter holder that I used...

_________________
Canon DSLRs: 7D, 5D2, 1D, 600D, 450D full spectrum, 300D IR mod
Lenses: EF 35/2, 50/1.8, 85/1.8, 135/2+SF, 28-80 V, 70-300L, 100-400L, TS-E 24/3.5L, MP-E 65, EF-S 15-85 IS
3rd party: Zeiss 2/50 makro, Samyang 8mm fisheye, Sigma 150 macro, 120-300 f/2.8 OS, Celestron 1325/13
Tinies: Sony HX9V.


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 Post subject: Re: From yesterday...
PostPosted: Sun Oct 07, 2012 7:59 pm 
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Joined: Sun May 25, 2008 12:48 pm
Posts: 7999
Location: UK
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Been pointed at the SCNR function, and the above happened.

_________________
Canon DSLRs: 7D, 5D2, 1D, 600D, 450D full spectrum, 300D IR mod
Lenses: EF 35/2, 50/1.8, 85/1.8, 135/2+SF, 28-80 V, 70-300L, 100-400L, TS-E 24/3.5L, MP-E 65, EF-S 15-85 IS
3rd party: Zeiss 2/50 makro, Samyang 8mm fisheye, Sigma 150 macro, 120-300 f/2.8 OS, Celestron 1325/13
Tinies: Sony HX9V.


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