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Posted by krf on October 18, 2000 at 15:48:42:
In Reply to: Creating negatives from positives posted by Ajit Sagar on October 18, 2000 at 09:51:36:
: I want to create negatives from some old photographs I have. What kind of equipment will I need?
All you need is a camera that will focus close enough to fill up the frame with the picture you're copying, a tripod or copy stand to hold the camera steady and a suitable light source. For the best result, use two lights--one on each side of the subject photo at a 30-45 degree angle from the axis of the camera lens. You can use a 35 mm or medium format camera. If the photos you are copying are large, you might be able to get by with a standard lens on your copy camera. If the photos are small, you can use either a lens with a macro setting or close-up diopters that screw into the filter threads on the lens. However, a macro lens will produce a sharper negative that will look better when making big enlargements. To set exposure, it is best to meter off of an 18 percent gray card, which will produce a more accurate result, particularly if the original photo is dark or light. You can also use an incident light meter.
krf
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