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Jupiter pic, very low in the sky these days + GRS JUNIOR!

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18 years 7 months ago #27598 by dave_lillis
Now that I'm looking at the images in the first post on my "better" monitor, I can now see that the second Jupiter image has the whiter areas between the belts too washed out. I'll try re-doing these tomorrow.

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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18 years 7 months ago #27603 by JohnMurphy

John, its very interesting that you prefer the first image, I almost prefer the second image, on my monitor its details look a little crisper although I prefer the colour balance in the first one, what makes you prefer the first?


To me there is more detail visible in the first, also the GRS and band look more clearly defined. HOWEVER. What you see on this site is never the whole picture, I reckon jpeg destroys most astrophotograpic images (well maybe not destroys). I've noticed this with images I've posted and most of the detail gets washed out, bright areas loose all detail etc. etc. a pity. Some of the images I posted this evening looked fine at home but when I converted them to jpeg detail got lost, and when I view them on this site they seem even worse. Maybe it's just my monitors - Dell 17" LCD on the PC and a 15" LCD on the laptop, where I do most of the processing. Maybe I should move back to CRTs again (no thanks).

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John Murphy
Irish Astronomical Society
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18 years 7 months ago #27616 by dave_lillis

when I view them on this site they seem even worse.

Now thats interesting, I thought I saw something like that also, I was comparing the jpeg in my windows directory to the one on the site which are the same file, yet I thought the one on the site looked abit worse.
I also have a laptop (TFT screen) and find that I cannot do any processing with it, if I did and then looked at the resultant image on my desktop CRT, then the brightness would be all wrong. You'll find that many will not process using a TFT screen, I use CRTs only for this purpose. I dont have a LCD so I dont know how they fair.

The bmps for my planetary images are less then 100k but we're not allowed put them up here.

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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18 years 7 months ago #27630 by JohnMurphy
Dave,

It seem's the problem may be my flat screen monitor at home. I have the exact same model at home as here in work, but the picture here looks reasonably OK. The one at home was completely washed out looking.

Pity about it not accepting bmps or tiffs.

Clear Skies,
John Murphy
Irish Astronomical Society
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18 years 7 months ago #27635 by daveg
Hi Guys

Thats much more detail than I've been able to get so far. The "blurring" near the edge is due I think to field curvature on an SCT and what they call the onion ring effect is too low of a gain setting. You have to get Jup just right - to much and it saturates too little and it's onions I'm afraid!

DaveG

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18 years 7 months ago #27638 by dave_lillis
The edge blurring in the first post is definitely processing, I tried to remove mild colour distortion but as you can see not too successfull.
Bluring in the second set of images could be SCT field curvature, but I wouldn't have thought so.
Thanks for the "onion rings" explaination, I couldnt figure out where they were coming from.

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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