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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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    Kowa Genesis 44 Prominar XD... What filters to put?

    I got off the 'protective filter' bandwagon while birding in Ireland. Enjoying the normal Irish weather, condensation gradually accumulated between the scope lens and its protective filter., rather to my surprise. The penny dropped only after the bird (a Red Flanked Bluetail iirc, a really good...
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    Kowa Genesis 44 Prominar XD... What filters to put?

    Are polarizing filters likely to be am improvement over just wearing polarized sunglasses? They certainly seem less convenient, based on your description. More generally, any added glass will reduce the light transmission. Adding lens hoods instead of filters would better protect the lenses...
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