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Old 30-04-2012, 05:41 PM
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gregbradley
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Join Date: Feb 2006
Location: Sydney
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Quote:
Originally Posted by DavidTrap View Post
The exposures were totally different Greg (about 3 stops different), and both have been stretched in Lightroom.

I'll try 30 sec exposures at F2.8 at both ISO3200 & 6400 next time and compare results. Hopefully the transparency will be better.

I ran a sequence through HLVG plug-in which definitely got rid of the green. Unfortunately there was still a brownish gradient across the horizon - I dampened that down with a "desaturating gradient fill" in LR. I think it's probably worth using the HLVG plug-in on good data. Takes a while to export the files out and then run through a batch process in PS, but not too bad. I can't upload a HD version to vimeo this week.

DT
That's good to hear. I think the HLVG plug in is pretty vital for DSLR night shots otherwise they all look too green (Canon/Nikon - all of them except Alex's). He must do some post processing to get rid of it I suspect. Then again he is also shooting at a very dark sky.

Can you run something like Gradient Xterminator in a batch process for that? That would be cool.

I could create an action to remove a gradient better than Gradient Xterminator but it wouldn't apply to every different image - only those of the same type of shot.

But perhaps it could be done for a specific sequence and it may be worth the trouble.

If you are interested email me a couple of stills in a sequence and I'll record a gradient removal action for you and it'd be interesting to see if it works well or not.

Greg.
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