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-   -   Lighting & difficult metallic colors (https://forums.steves-digicams.com/konica-minolta-26/lighting-difficult-metallic-colors-2500/)

cald Sep 4, 2002 8:17 PM

Lighting & difficult metallic colors
 
If I learn how to put up a photo, Ill show my frustration. Our product front panels are a kind of grey metallic with hints of silver (?)
Silkscreen on this is white. Tried all the WB including custom i.e. shooting large white sheets of HP Design Jet paper (back drop for the product.) Trying to get the custom WB setting to give me a true white backing. Just framed the shot in .3 ev, will try 1.0 ev to see how dramatic the photos change.

sjms Sep 5, 2002 12:50 AM

what are you using to light the scene?

cald Sep 5, 2002 6:04 AM

lighting
 
Some kind of flourescent. Very bright,instant on. Flourescent WB gives a blueish cast to the photos.

photo_mage Sep 7, 2002 2:56 AM

I don't know if this is the problem but you shouldn't use printer paper to set your white balance. Most have a bluish tone added to make them look whiter. Your best bet is to use a gray card to set the wb.

cald Sep 7, 2002 5:39 AM

Gey card to set WB
 
Is there a source for 'calibration cards?
Similar to the old setup cards for calibrating studio TV cameras years back

NHL Sep 7, 2002 6:53 AM

cald

You can also adjust WB afterward, but the bigger problem is your lighting is uneven (ie. more white on left than on right side) so you will never get the WB right on this shot unless you doctor it with the gradient mask in Photoshop.

http://www.pbase.com/image/4568560.jpg


BTW Awsome PA you've got there, is it for Madonna or Britney Spear ?:D

[Edited on 9-7-2002 by NHL]

photo_mage Sep 9, 2002 12:06 PM

Try moving the light source (if possible), or move the table so that the light is more even. Or you can try using some of the paper you're using on the background to reflect some light back onto the front right side. Put some on the right side extending about 6 to 8" in front of the unit, or in front angled to reflect the light onto the front right face (depending on the location of the light source).

As to a source for white balance calibration you can use an 18% gray card (Available in most photo shops).


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