Quote:
Originally Posted by dugnsuz
Fantastic image Craig
I like the original image too - I'm a fan of red, and as we discussed, I think your Hutech camera filter lets a load more HA through than my Baader filter.
Echo-ing Matt's comment - I exclaim every time I see the images coming out of your Tak 90. They are very sharp and detailed.
Must admit I'm confused regarding using a CWB with a modded DSLR.
If I set a daylight CWB using an 18% grey card, wouldn't that bring the camera back to its pre-modded colour balance settings and negate the point of having a UV/IR cut filter modification?
All the best
Doug  |
No, the Ha goes through with the mod and is blocked by the stock filter.
The custom white balance balances the histogram of the data with the Ha now in it.
You still have all your Ha data there but red doesn't dominate the image so heavily. It will still have a slight red cast but then you process that out when you do your colour balancing.
It just makes it easier. You can do it anyway in Photoshop without it but you need to slam down the red curves to get rid of the red bias.
Greg.