Help with DLSR colour cast

trent_julie · #1 01-01-2012, 09:18 AM

Hi all,
I took my new DSLR out and condcucted an imaging run, what I found is that my ngc 2070 is Cyan in colour, as oppose to all others I have seen that appear pink in colour. What can I do to fix this or better still prevent this in the future? Bearing in mind that the camera is a 7d and Julie would kill me if I modded it. Attached is the problematic 2070.

Cheers,

Trent

JohnG (John) · #2 01-01-2012, 09:40 AM

That is a normal response from an un-modded camera, it is picking up O111 emissions, the built in filter blocks quite a high degree of Ha emissions so the the cyan of O111 overpowers the red of the Ha.

Cheers

trent_julie · #3 01-01-2012, 10:40 AM

Thanks for that John,
I assume nothing can be done post processing? Seems like a waste

Trent

Octane (Humayun) · #4 01-01-2012, 11:12 AM

Hey guys,

It's not a waste!

You just have to concentrate your efforts on objects which emit less in hydrogen alpha.

Go for reflection nebulae like the Pleiades.

Otherwise, pick up a dirt cheap 40D, and, get it modified (or, pick up an already modified one).

I will admit, the lack of hydrogen alpha does get a bit boring after a while, as you get used to seeing everyone's pink images.

It's almost like a rite of passage.

Happy New Year, to you both!

H

JohnG (John) · #5 01-01-2012, 11:27 AM

Hi Trent

Like H says, not a waste, been quite a while since I had anything to do with an un-modded DSLR but I seem to remember having to do a lot of mucking around with colour balancing, you just have to watch you don't effect your stars.

I actually concentrated on Star Clusters where the lack of Ha had no real effect.

Cheers

trent_julie · #6 01-01-2012, 12:35 PM

Thanks H and John,
Permission has been granted to mod the 7d as a result of your replies
Cheers!

Trent

And a happy new year to you H

leon · #7 01-01-2012, 01:27 PM

A lot has been said over the years about different colors coming from different camera's modded and otherwise.

And although some colors certainly look better, I feel we are blessed that we are able to capture these wonderful objects at all.

Top shot Trent, Green, Blue, Red, or whatever.

Leon

trent_julie · #8 01-01-2012, 02:22 PM

That was an unexpected compliment

Cheers Leon & happy new year

irwjager (Ivo) · #9 01-01-2012, 05:57 PM

Quote:

Originally Posted by leon

A lot has been said over the years about different colors coming from different camera's modded and otherwise.

And although some colors certainly look better, I feel we are blessed that we are able to capture these wonderful objects at all.

Top shot Trent, Green, Blue, Red, or whatever.

Leon

So true Leon.

And nice shot Trent!