Lens Filters

I tried some filters if you are talking the closeup ones. I also have tried light filters. I found it does not help. if you darken the light to much the camera shutter slows. the image looses it sharpness. ottlites its more about placement and directing the light to the coin. they work very well. mount so of your filters and try them. if you are very experienced at setting the camera. which I am not. they may work very well for you. I would like to see some images done with them. by some one that can program the camera. that way they could share the setting. have a great one

Back in the days of film, before there was auto white balance and Photoshop, you'd have to use color correction filters when shooting daylight film under tungsten lighting (especially slides, where there's no 2nd chance in the darkroom). With a DSLR, you could just use auto white balance instead, or do post processing in Photoshop.

Some DSLRs are modified for astrophotography, where they remove the usual color correction filter from in front of the sensor to improve H-alpha sensitivity. These cameras give a strong pinkish image when used for regular photography, and the red pixels usually saturate long before the green and blue ones. They sell special filters that you can put over the lens to restore the correct color balance for regular shooting.