I use a vintage optical viewer to select the images on film that I want to scan as PNG files. The original lamp was tungsten which generates a lot of heat after a while which can cause negatives to curl and affect focus on the scanner table. I decided to try this lamp because its color rating is in the same range as tungsten, which is an important consideration when viewing color slides. The intensity (light output) of this LED lamp is slightly higher, but the light distribution is better than the filament of the old lamp, which means that there are no "hot spots" when viewing the picture.
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