GIFs have a lot of uses in optics. If you can afford it, do get it. Then compare it to a cheaper green glass. Dondjhmis
Thanks Don, David and Merv for bringing in your in-depth experience to discussing this topic. GIF filters will provide a higher contrast, especially for phaserictsuk
After what Merv wrote, I should point out that my experiences with interference filters for microscopy are based on phase contrast with plane-polarized light.djhmis
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