Leyburn Brumby

[gregbradley]

For 30 minutes that is very good and the luminance shot is Sweet!

Greg.

[RobF (Rob)]

Originally Posted by bmitchell82

Mate when you stop learning your dead! Its when you have little things that keep bugging you and you go and find out whats going on to fix them is when you really start learning the good stuff! My old 254 newt is a classic example of that and as such its getting nearly to the point that i cant improve it any further! Just a few more things and shes completed.

As for data. its always the way, did a bit of work a little while ago with the 254 and a SBIG 402ME which has a tiny sensor, if you look in my gallery under galaxies you will see the effort there. amazing detail for a sub 1MP camera! and then sometimes you get 4hrs worth of data that end up looking like spew.

Im hoping to get under the stars at the end of the month to let the newt do its thing now i have all the correct spacers for the MPCC QHY9 and everything is tuned to within a hair of a bees..... We might have to compare our HH data!

You've got the sucker singing so well now Brendan I don't think it would be a very fair contest. Hope you do get a well earned break from studies soon though and get out there!

Originally Posted by mill

For 30 minutes it looks really good.
When you get more data it will look excellent.

Thanks Martin! Yep, hoping to hoe into Orion again soon hopefully.

Originally Posted by gregbradley

For 30 minutes that is very good and the luminance shot is Sweet!

Greg.

Thanks Greg
Thought I better own up and show what I was really trying to achieve.

[Hagar (Doug)]

Very nice Rob. Short subs again. Whats going on in QLD? Everyone seems to be belting out images with relatively short subs.

[RobF (Rob)]

Hi Doug

I guess 2 main reasons for the sub length:

1. KAF8300 has relatively lowish well depth, and with the Newt it starts to saturate bright star within 2-3 mins (and there are some very bright stars in this field and nearby). 8" at F5 is a lot different to say F7 in a 4" refractor as you'd know.

2. Maths and object visibility - this was back in April and I only had an hour or two before Orion set, so I roughly tried split my time 50:50 Lum and RGB then get enough of each filter to have at least 4 images (less than that and you don't get effect noise control during sub integration regardless of sub length I find).

Hopefully I'll soon be able to get back into imaging Orion in more detail if work and weather conspire correctly

[bmitchell82 (Brendan)]

Meh my 254 is good for 10min subs and still gets decent star colour. it's all in the processing rob. With stable guiding in now pushing out into the15 and 20 min bracket to really pick up the faint stuff.

[RobF (Rob)]

It's true there's all sort of processing options, but optimal exposure time is a science in itself (sky glow, faintest object luminosity, brightest star, imaging time available, number of shots per filter, allowing for sensor spectrum sensitivity). More than one way to skin a cat. It's just a fact though that brighter stars will be right out on the right of my histogram at a few minutes, and the more you saturate them the more work you've got recovering true RGB colours from their outer edges later. All part of the fun