Luminous Trifid, ISO 6400,1600 & 800.

[tilbrook@rbe.ne (Justin Tilbrook)]

Hi,

The Trifid and it's background has always been tricky to balance.
In this image I've processed to make both in balance, or at least the way I perceive it should be after looking at many images.

The combination of ISO 6400 and 1600 seems to be a good combination bringing out fainter details and giving richness to the colour palette.

I'd love some input on this image, do you think I achieved the right balance.

8" F/4 astrograph HEQ pro 5 mount. Orion mini guider.

Unmodded canon 1100D, baader type III coma corrector.

30 x 2 minute subs, ISO 6400 and 12 x 5 minute ISO 1600 and 5 x 2 minute ISO 800 . Stacked in DSS, processed in Photo shop Cs2..

Cheers,

Justin.

[PeterEde (Peter)]

Wow
Very nice. Puts my effort to shame

[Camelopardalis (Dunk)]

Very rich, nicely done Justin

Do you not see lots of noise with the 1100D at ISO6400?

[Larryp (Laurie)]

Very nice, Justin

[tilbrook@rbe.ne (Justin Tilbrook)]

Originally Posted by PeterEde

Wow
Very nice. Puts my effort to shame

Thanks Peter!

Originally Posted by Camelopardalis

Very rich, nicely done Justin

Do you not see lots of noise with the 1100D at ISO6400?

Thanks Dunk!

I'm running a cooler box which helps, but 2 minute seems perfect for ISO 6400. Any longer and the sub gets swamped with light, shorter and colour noise becomes a problem.

Originally Posted by Larryp

Very nice, Justin

Thanks Laurie!

Cheers,

Justin.

[PeterEde (Peter)]

Might have to bump up to 6400 and see what happens. I'm building my own cooler.

[tilbrook@rbe.ne (Justin Tilbrook)]

Originally Posted by PeterEde

Might have to bump up to 6400 and see what happens. I'm building my own cooler.

If you make a cooler box, make it is light as possible.
I'm on the limit with the my setup, gets tricky to balance.

Good luck with construction.

Cheers,

Justin.

[Camelopardalis (Dunk)]

Originally Posted by tilbrook@rbe.ne

I'm running a cooler box which helps, but 2 minute seems perfect for ISO 6400. Any longer and the sub gets swamped with light, shorter and colour noise becomes a problem.

Excellent! What temperature do you find works best? (sorry for being a bit OT, just curious)

[atalas]

Good effort Justin.

[Stevec35 (Steve)]

Well everything seems to work for you with a DSLR Justin. It's another fine shot. Might be a bit too magenta though.

Cheers

Steve

[Shiraz (Ray)]

on a roll Justin - cracker of an image

[RickS (Rick)]

Colours look good, Justin. About time you started posting higher res images

[Ross G]

Another good looking photo Justin.

Great colour and composition.

Ross.

[cometcatcher (Kevin)]

Looks great Justin!

How heavy is your cooler box?

[kosh]

Nice work Justin.

You've managed to get a lot of the blue out. Looks great.

Goran.

[LewisM]

More Tilbrook magnificence

[tilbrook@rbe.ne (Justin Tilbrook)]

Originally Posted by Camelopardalis

Excellent! What temperature do you find works best? (sorry for being a bit OT, just curious)

For the 1100D 10-C seems to be the starting point at the chip for relatively noise free subs.
The cooler box is handy but not well designed, this is my second. The internal fan gives up, I've replaced it but it will need replacing again soon.

At best it cools to 17-C below ambient, at the moment its only 12-C below.

Originally Posted by atalas

Good effort Justin.

Thanks Louie!

Originally Posted by Stevec35

Well everything seems to work for you with a DSLR Justin. It's another fine shot. Might be a bit too magenta though.

Cheers

Steve

Thanks Steve!

Does look a tad magneta in the background.

Originally Posted by Shiraz

on a roll Justin - cracker of an image

Thanks Ray!

Originally Posted by RickS

Colours look good, Justin. About time you started posting higher res images

Thanks Rick!

Yeh I know a bit slack on that front.

Originally Posted by Ross G

Another good looking photo Justin.

Great colour and composition.

Ross.

Thanks Ross!

Originally Posted by cometcatcher

Looks great Justin!

How heavy is your cooler box?

Thanks Kevin!
The cooler box weighs 1.105 kgs, the main problem with that is most of the weight is behind the camera.
Again an aspect of this coolers box design I don't like.

Originally Posted by kosh

Nice work Justin.

You've managed to get a lot of the blue out. Looks great.

Goran.

Thanks Goran!

Originally Posted by LewisM

More Tilbrook magnificence

Lewis!

Cheers,

Justin.

[Camelopardalis (Dunk)]

Originally Posted by tilbrook@rbe.ne

For the 1100D 10-C seems to be the starting point at the chip for relatively noise free subs.
The cooler box is handy but not well designed, this is my second. The internal fan gives up, I've replaced it but it will need replacing again soon.

At best it cools to 17-C below ambient, at the moment its only 12-C below.

Good stuff - thanks Justin!