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First ever go at Jupiter


bobmoss

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I finally managed to get some clear skies last night (been trying to get out since Christmas!) and have my first ever go at Jupiter.

It was taken with an 10" LX200ACF at 2500mm FL using an ASI120MM camera and an RGB filter wheel. I took 30 seconds (approx 30fps) AVI each of RGB and the stacked in Registax 6. It then combined everything in Gimp.

The black spot is Io's shadow.

The seeing was quite bad (Jupiter was dancing all over the place) so I'm hoping to get some better pictures another night.

Oh, and I think my collimation is slightly out too!

post-2366-0-52609200-1425065037.jpg

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That's a cracker for a first go, especially shooting rgb. Good result also for such a low frame rate. Was this full frame? I think you shouls be able to get 70-100 fps on a 640*480 roi with that aperture and focal length. Might be worth a stack in as!2 and winjupos de-rotation to get the best from the data.

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That's a cracker for a first go, especially shooting rgb. Good result also for such a low frame rate. Was this full frame? I think you shouls be able to get 70-100 fps on a 640*480 roi with that aperture and focal length. Might be worth a stack in as!2 and winjupos de-rotation to get the best from the data.

Thanks. It wasn't full frame, I did it at 640 x 480 roi. I could get the frame rate up higher but only by increasing the gamma and gain. I wasn't sure whether it was better to have a faster fps or a lower gain?

I'll give as!2 and winjupos a go when I get chance - I didn't spend too long in registax as I didn't really know what I was doing so just fiddled with settings till it looked good.

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Thanks. It wasn't full frame, I did it at 640 x 480 roi. I could get the frame rate up higher but only by increasing the gamma and gain. I wasn't sure whether it was better to have a faster fps or a lower gain?

I'll give as!2 and winjupos a go when I get chance - I didn't spend too long in registax as I didn't really know what I was doing so just fiddled with settings till it looked good.

Cheers Bob, I'm shooting around F16-F18 with my 10" newt and getting 100 fps+ on 640x480.    Gain for Lum is around 10% and for Channels 25%.   I never use the gama offset other than to assist with finding focus and histo is comfortably at 70% with 8ms for L and 14ms for channels.   Have you got the high speed setting enabled and what software are you using for capture?

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That`s a cracking image first image Bob! Lovely image complete with a transit. Well captured indeed!

                                                      Best regards,

                                                                             Ralph

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Cheers Bob, I'm shooting around F16-F18 with my 10" newt and getting 100 fps+ on 640x480.    Gain for Lum is around 10% and for Channels 25%.   I never use the gama offset other than to assist with finding focus and histo is comfortably at 70% with 8ms for L and 14ms for channels.   Have you got the high speed setting enabled and what software are you using for capture?

Some good info there, very useful, thanks.

I'm using SharpCap and I'm not sure if I've goit the high speed mode enabled...

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A superb shot for a first go Bob, you should be very pleased. 

I was out on the same night (C11, 2x barlow, ASI120MM) and was shooting at 37 fps (gain of 40%), the conditions were far from ideal.  I did try a higher gain (50%) to shoot at 55 fps (10,000 frames per colour), but I don't think the conditions were good enough for the high frame rate.  I shot around 150 secs worth (6,000 frames per colour) and used WinJupos to combine the final image so rotation of Jupiter was compensated, to some extent.  The higher frame count does give you more to play with, but you need to be quick between colours, otherwise Jupiter rotates too much.

Hope you get a few more runs in to try different settings and hopefully in better conditions.  Probably best to get the collimation checked as well, then I think you will get something first rate.

Robin

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