Jupiter 27/9/08

HCR32 (Peter) · #1 28-09-2008, 09:28 PM

Dont no why but this is my first shot of Jupiter with a mono ccd but its not what I expected. Focus was difficult to gain and the seeing conditions I would say where crap.(In Sydney) The scope was a 10inch f/8. Disappointed with it. What I need to know is what am I doing wrong.

Dennis · #2 29-09-2008, 02:58 AM

Hi Peter

If that was taken through a DOB, I’d be pretty happy with the result for a 1st light image, especially if the ‘scope wasn’t tracking and you had to focus manually.

There are some mighty fine Jupiter imagers on Ice In Space and they have at least a couple of seasons under their belts, not to mention equatorially mounted ‘scopes and motorised focusers.

Cheers

Dennis

iceman (Mike) · #3 29-09-2008, 04:31 AM

Hi Peter
What are you disappointed with? What's not what you expected? Tell us more so we can point you in the right direction.

HCR32 (Peter) · #4 29-09-2008, 06:24 AM

Well the pic was taken on Sat night which I thought wasnt the greatest night Ive see to use a telescope. I hear plenty of ppl saying that if the seeing conditions arent the greatest it can affect the shot some what in detail how much I have yet to experience. What I need to now is what are the most important thing in getting a good shot. The telescope is a sct and from what I could tell it was well collimated that night. The tracking was good. The thing is I saw a photo the other day taken with a f10 sct of the same size using the manual focus on the back of the ota and the results where almost as good as Ive seen in this site. I want the band details to come out a little more but there just not there. Its got my mind in a twist I even read your aticles Mike on planetary imaging.

! plz

My scope is a 10" f/8 sct.

iceman (Mike) · #5 29-09-2008, 10:02 PM

Hi Peter
As you've read in my article, there are a number of factors that are important to getting a good shot. Seeing is the #1.
Conditions in Sydney have been horrible lately, and Sat night was no exception. Windy and hot!

Also at the focal length you're using (I assume it was at prime focus), you're not going to capture a wealth of detail - it's just too small. Do you have a barlow you can put in the imaging train?

What mono CCD are you using?

Can you post a link to the image you saw with the same scope that was really good?

HCR32 (Peter) · #6 29-09-2008, 10:35 PM

The image isnt posted it was in someone computer. Long story in how I got to see it. The camera is a dmk21. I do have a barlow, I have a 2.5x and a 2x. I have been considering a powermate whats your thoughts on the value to quality ratio is it worth getting. The same night I use the barlow but the image quality was terrible. Thanks for your quick response.

Screwdriverone (Chris) · #7 29-09-2008, 11:04 PM

Hi Peter,

I would be happy with that image, I know its not exactly round but there is some detail and also a moon shadow by the look of it.

The wobbly shape is probably the seeing, like Mike said, I have also noticed Jupiter is like its sitting at the bottom of a shallow creek of muddy water this week.

Rule #1 of planetary imaging: Listen to Mike Salway.
Rule #2: Read everything by Mike
Rule #3: If all else fails see rule #1 & #2.

Cheers

Chris

HCR32 (Peter) · #8 29-09-2008, 11:17 PM

Your right with your comment. I checked the jetstream and it sure was there on sat night. The pic got both the moon and the shadow. Think it was ganamede.

cookie8 (Vincent) · #9 29-09-2008, 11:18 PM

[quote=iceman;368273
Conditions in Sydney have been horrible lately, and Sat night was no exception. Windy and hot!
quote]
Hi Peter. Trust me,I absolutely understand your frustration. Since I purchased my webcam Sydney's seeing has been only ordinary at best. But I keep telling myself, I do it not because it is easy but because it is hard.Don't ever give up.

HCR32 (Peter) · #10 30-09-2008, 07:18 AM

You know whats hard set up and pack down. The problem is I want a reward for it. lol

AlexN · #11 02-10-2008, 04:02 PM

I hear you on that peter.. there is nothing worse than the 1 - 1.5hr set up, only to have to go through the 1.5 - 2 hr tired as all hell pack up with nothing to show for it all.... I have found with planetary imaging that persistance is the key to great results... read, and re-read capture and processing guides...

a 2x or 2.5x barlow in a 10" F/8 will give enough image scale to get some nice detail, and the aperture will give you nice resolution.. now what you need is seeing to match..

Stick in there mate..