GeoffLawrence.com Photo Gallery - Modified Crystal Flower -

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richingr Registered: October 2010 Posts: 1,511	Kev i put up the wrong picture last night How does this one look ??
	· Date: Tue January 11, 2011 · Views: 988 · Filesize: 53.2kb, 840.2kb · Dimensions: 1500 x 1000 ·
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	Keywords: Crystal Flower -

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Kev

Registered: February 2008
Posts: 2,722

Wed January 12, 2011 1:28am

The lighting is still too harsh...and thus not 'diffused' enough yet.
Plus, also...obviously, you need to do some spec cleanup.
I tell ya, using black plexiglass is tricky...it takes getting just the right angle, having black card backdrop & above to create a truly black colour (ie: reflected on the glass)...and a lot of cleanup.

Kev

Registered: February 2008
Posts: 2,722

Thu January 13, 2011 5:09am

Well, to me the background looks a browny colour and not black. Is the plexiglass a solid black colour?

richingr

Registered: October 2010
Posts: 1,511

Thu January 13, 2011 5:58am

yes it is black plexi. but see what you mean,can understand why people do not use it.cheers

Kev

Registered: February 2008
Posts: 2,722

Thu January 13, 2011 8:31am

To get it jet-black...one must use black card behind and above it...to cast a black shadow reflection into the plexiglass itself...if not, the plexiglass will simply absorb/reflect whatever colours are falling onto it.

IF you light the subject from the sides...you can place a thick art card behind it...and hold a card above it with one hand whilst you shoot. Angle the camera accordingly...so that when you look thru the viewfinder the image background appears totally black.

Once you've got that down pat...you can do the cleanup (of the dust, etc)...later on on post edit.

richingr

Registered: October 2010
Posts: 1,511

Thu January 13, 2011 8:41am

Thanks for the help Kev. I dont think i had black background in this one.I have now converted my light tent with black cloth on top and back . So will try it again with lighting from the sides .What camera setting do you normally use.

Kev

Registered: February 2008
Posts: 2,722

Thu January 13, 2011 11:44pm

Use Aperture priority, ISO 100, f/16 - f/22 and adjust EV (+-) accordingliy.
with a tripod - of course.

richingr

Registered: October 2010
Posts: 1,511

Fri January 14, 2011 7:59am

Cheers Kev much appreciated

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If your monitor is calibrated properly you should see sixteen distinct tones from white to black.