Gailey
Ideal_Rock
- Joined
- May 14, 2008
- Messages
- 3,783
Date: 9/20/2008 12:26:17 AM
Author: Gailey
I adore your Royal Rhodolite Pandora. Can you explain the ''Royal'' terminology??
Want one, want one, want one, want wone, wan twone!!
Peter are you hearing me?? something in that colour would look lovely with my citrine asscher. I''m thinking a pendant
What do you think ladies?
The ''Royal'' moniker is Richard''s (artcutgems) name for a particular kind of Rhodolite garnet. It''s the same as Grape Garnet if that helps.Date: 9/20/2008 12:26:17 AM
Author: Gailey
I adore your Royal Rhodolite Pandora. Can you explain the ''Royal'' terminology??
Want one, want one, want one, want wone, wan twone!!
Peter are you hearing me?? something in that colour would look lovely with my citrine asscher. I''m thinking a pendant
What do you think ladies?
Wow! Thanks Zeolite.Date: 9/20/2008 4:06:50 PM
Author: zeolite
Pandora, Your Canon Xti with macro lens, tripod, and cable release, is great equipment for gem photography.
I extracted 3 of your pictures, imported them into Photoshop, and read the EXIF data. Your camera records your camera settings when each picture is taken in this EXIF (EXchange Information File) data.
Your pictures were taken at a lens opening of f3.2, which must be near wide open (I'm guessing your macro lens is an f2.8 lens). When a lens is used nearly wide open. the exposure is short, but only a tiny range of depth is in focus. Your gem girdle outline is sharp, but the table of the gem is closer, and is out of focus, as is the bottom (culet). You probably have the control dial on the top of your Canon set to the green rectangle P, or program mode. The camera is choosing an opening, an aperture, that is too open.
You should turn your control dial to Av (aperture priority) and set the aperture (by means of the dial near the shutter button) to f11. This will make the gem much sharper, top to bottom (depth of field). The exposure will go longer, since the lens opening is smaller, but that is not a problem, since you are using a tripod. Try this new technique and show us the results.