hello
I need to photograph an area of 8.5x11 inches as clearly as possible (let's say a A4 page area) which means:
a) I need illumination that must be rich and it must be homogeneous without external glares and shadows and without diffusing the light out of the photographed area.
b) I need as less distortion as possible (barrel distortion, zoom distortion, skew distortion, any)
in order to achieve this, I am planning to construct this scheme, which shows apyramid, where at the top of the pyramid are placed the camera and a light source, the base of the pyramid is from a 8.5x11 inches non-reflective glass, the sides of the pyramid are cased from a material or something that doesn't allow the light to go outside the pyramid and diffuses the light to become homogeneous and concentrates the light to the base:
http://i37.tinypic.com/e6u8o7.png1. Is there any material that I can use to build the above construction?
Some kind of metal would be nice, but I need to get the parts in the exact dimensions as I need them, they need to be sturdy and I should be able to join them at home.
Or do you know any construction that is already as the one at the scheme?
2. What kind of diffusive material should I use for the sides of the pyramid?
Rhis is a diffusion material to case the sides of the pyramid:
http://www.kaiser-fototechnik.de/en/produk...ige.asp?nr=3439Do you suggest any better way to case the sides of the pyramid?
3. What kind of material should be best for the base of the pyramid?
Is it possible the glass to be illuminating and illuminate the object
below it? Is it possible the glass to magnify the below subject without
distorting it or the camera zoom should be ok (however it distorts)?
This is a kind of self-illuminating glass, to use as the base of the pyramid
http://www.kaiser-fototechnik.de/en/produk...ige.asp?nr=5617http://www.kaiser-fototechnik.de/en/produk...ige.asp?nr=2492Will it work better than placing a bulb at the top of the pyramid?
But it should not illuminate the page from below, but from above (I am not sure how this works), so it it does not work like this, I will put a simple acrylic glass at the base of the pyramid, or do you suggest something better?
Last, what kind of camera should be used? which settings? macro mode? (I am
looking for a camera that will be placed as near as possible to the
object in order to minimize distortion)
And, where should I position the light? any idea? at the sides of the pyramid or at the top of it?
Thank you very much!