Thursday, August 27, 2009

Photography: Photograping Things Inside Silver ESD Bags

If you are a photographer who has the misfortune to have to shoot pictures of objects inside translucent silver electrostatic discharge shielding/protective bags, you know it isn't the easiest photo to get right. I tripped over one way to make your photos a little less-bad, and give your viewers a better idea of what's inside:

Elevate one end of the static bag so the ambient light goes around. If your ambient lighting is overhead, turn most of it off and shine a reflected and/or diffuse light source under your bag. You'll be able to tell what's inside a little better. These are at the same angle, same ambient lighting, the only difference being there is no light coming through the first one, and the second has a reflected light hitting the benchtop under the bag. A white backdrop would probably help, as would a backlight with a neutral color temperature (unlike mine). These were done pretty quickly; I imagine your results can only get better, the longer you experiment with the concept.

You will still have to putz with contrast and color saturation in photoshop (hint: wear a white shirt, not a red one like mine when I shot these) but at least you can tell there is something in the bag.

Click to embiggen!
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Update: Reader David asks if a polarizing filter would help. Under my fluorescent lighting, on a stainless backdrop, a polarizing filter actually made it worse, by darkening the image. These were shot with the same camera settings, with the same post-processing applied in Photoshop. I don't note any significant clarity improvement with the polarizer. I rotated it all the way 'round just in case, and took pictures every 90ยบ of rotation.

Seriously Wide Image, click to embiggen
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But VFD, that's on manual settings! Your camera will compensate for the filter on manual settings!
Sure it will. Those were all taken at F4 @ 1/25sec. My camera likes F2.8 for shooting indoors. It also has a funny idea of what a washed-out image isn't. Here are the results of shooting in automatic mode at an angle that lets you see what's inside the bag:

Click to see full size.
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The one on the right is through the polarizer. It is the clearer of the shots I tried with the camera on auto. The amount of glare reduction you see could very easily be as a result of a camera angle being a degree or two different. The rest of the shots thru the filter were all somewhat more blurred, because the shutter was open for a whopping QUARTER of a second to make up for the dimness of the filter! I could try it with a tripod, but I think you all can see a theme in my opinion of how much a polarizing filter helps *in this circumstance* with this camera and subject.

What do you think? This is a series of shots taken with the same camera settings and setup. The only difference is the camera angle relative to the light reflecting off the ESD bag.

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And here I used the automatic setting and the only difference is the polarizer:

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I guess the polarizer does help. A little bit. If you have good lighting, it might make your life a *very* little easier. The bigger difference seems to come not from using a polarizer, but from making sure your lens is in the right place.

2 comments:

David said...

Don't polarizing lenses help?

Vote For David said...

Not if you don't have one!

I do. I'll try it and update this post. Thanks.