Pac828 wrote:
I am trying to photograph art work behind glass
I create window boxes out of actual old windows with art work inside
Similar to Joseph Cornell's boxes
I am having trouble photographing the box with the window closed to give the total effect.
The reflection of light off the glass hides what is inside.
I have tried a polarizer no good
Any ideas
I've read and thought about this pretty carefully. I suspect your light source, whatever it is, is pretty close to the lens axisthat is, if you draw an imaginary line through the camera to the subject, that's the axis, and if the light source is on or very close to it, it will cause reflections, like trying to take a "selfie" with flash-on-camera in a mirror. The challenge for you is that the glass on the box is a mirror, so it reflects whatever is in front of it. Because it is that wonderful old crown glass you want to see that it's there and that it has texture, so you don't want to remove it.
A physical principle is that "the angle of reflectance equals the angle of incidence," which is a hifalutin' way of saying that the light source(s) need to be on an angle off of the axis of the lens. You tried a polarizer, and that won't work unless the light incident to (falling on) the box is "cross polarized,"
plus on some angle other than 90° to the lens axis. You would not need special lights, but you would need "sheet polarizers" large enough to place in front of whatever lights you are using, and the lights need to be on an angle from the box you are photographing. I've been hunting for mounted polarizers like I had in my old copy setup and can't find them, but try this link to give the idea:
http://www.amazon.com/Educational-Innovations-Polarizing-Filter/dp/B009P8B548/ref=pd_cp_p_0Those are simple 6x6-inch linear polarizers. If the light(s) are small, they will work, but you might have to cobble up a cardboard mount. The trick is simple: the lights are polarized, say, vertically, and the circular polarizer on the lens is set so its axis is horizontal. So long as the glass door on the box is not reflecting a light, the glass should photograph with few reflections except the camera itself, and if the room is otherwise dark, that may be acceptable.
In fact, you may not even need cross-polarization if the room is otherwise darkened and the light(s) are off the lens axis. Just bear in mind that the glass on the door of the box is a mirror. It will reflect anything directly in front of it. :wink: