Posted by Paul Wegemann on January 27, 2010 at 11:53 AM
I've been asked to display a few prints under some horrendous fluorescent lighting. The prints I've tested so far in this lighting look like crap. In processing, how should I adjust for this? Thanks for any thoughts.
Paul
Posted by Jesse Speer on January 27, 2010 at 12:31 PM
I have no clue how to account for this in processing ... I bet Nat has a good answer. But I do know that you can get custom profiles that are targeted at various print lighting conditions. Eric Chan is someone I've used for custom printer profiles in the past. In fact, his default service includes profiles for various lighting conditions. One of them was indoor, fluorescent - if I remember correctly. You might email him and describe your needs. Not a quick solution, but it might help.
Posted by Paul Wegemann on January 27, 2010 at 1:06 PM
Thanks, Jesse. I figured a profile might do it. Unfortunately, this came up on very short notice, so I only have 2 days to get things ready. I appreciate the advice.
Posted by Don Grall on January 27, 2010 at 3:44 PM
There are a large variety of wave lengths put out by a variety of fluorescent lights. If the display is for short term, I would not worry about it, but if it is a permanent display, you might want to get a light meter to get a wavelength reading in order to make adjustments. Back when I shot film, I used a fluorescent filter on my lens which was a magenta color to balance out the greens put out by the fluorescents, but that was for film correction. My guess would be to add an equivelant to a +20CC magenta filter factor to the printer, so your prints would come out looking a bit too magenta under normal sunlight balanced light.
Posted by bill meikle on January 27, 2010 at 5:31 PM
Or can you add additional (white) lights to highlight your pics?
Posted by Paul Wegemann on January 27, 2010 at 7:18 PM
Don and Bill, thanks. I can't add any lighting, but I think I'll try a sample with a magenta boost and see how it looks.
Posted by Ken Wyatt on January 27, 2010 at 11:49 PM
What about replacing the existing bulbs with daylight balanced ones? Probably wouldn't cost that much and maybe the venue would foot the cost.
Posted by Nat Coalson on January 28, 2010 at 11:38 AM
Floursecent lights have a lot of green in them. Whic, not coincicentally, is the opposite of magenta.
So if you use a curve adjustment layer, you can work on the green channel to reduce green and increase magenta at the same time.
Good luck with your project; please let us know how it all works out.
Posted by Paul Wegemann on January 28, 2010 at 12:14 PM
Ken, thanks. I thought about that. Unfortunately, changing lights is not an option.
Nat, thanks. This idea seems like my best bet. I'm making some more test prints with varying levels of magenta and green. I'll test this tonight.
Posted by Paul DeCesare on January 28, 2010 at 12:32 PM
Paul, I was in Bass Pro Shops last week and they STILL carry the pump-action Red Ryder BB Gun, I was amazed! Still around after 35 years. How about that. The BBs used to curve slighly left if I remember correctly, so keep that in mind when aiming at the light fixtures.
"Oh, that's odd, how did those light all manage to blow at once? Well, to save your staff some time, I do happen to have some daylight-balanced replacements in my truck outside..."
Seriously, since you have to magenta-soak your images for display, don't print some au-natural in case someone wants to purchase! Isn't that frustrating? "Hi, we want to have you display your work, and we're going to provide the worst environment imaginable for you."
Posted by Paul Wegemann on January 29, 2010 at 8:48 AM
Funny thing is Paul, since I work nights, I probably could have gotten away with that!
Thanks for all the tips, folks. What I wound up doing is making some test prints, viewing them under the ugly light, then making some color adjustments per Nat's method. I did this twice and things look OK.
I appreciate all the tips.
Discussion
10 repliesPaul
http://people.csail.mit.edu/ericchan/photos/profiles.html
NPN's own Michael Gordon also offers custom profiles:
http://www.greatprinterprofiles.com/
So if you use a curve adjustment layer, you can work on the green channel to reduce green and increase magenta at the same time.
Good luck with your project; please let us know how it all works out.
Nat, thanks. This idea seems like my best bet. I'm making some more test prints with varying levels of magenta and green. I'll test this tonight.
"Oh, that's odd, how did those light all manage to blow at once? Well, to save your staff some time, I do happen to have some daylight-balanced replacements in my truck outside..."
Seriously, since you have to magenta-soak your images for display, don't print some au-natural in case someone wants to purchase! Isn't that frustrating? "Hi, we want to have you display your work, and we're going to provide the worst environment imaginable for you."
Thanks for all the tips, folks. What I wound up doing is making some test prints, viewing them under the ugly light, then making some color adjustments per Nat's method. I did this twice and things look OK.
I appreciate all the tips.