hello again,
so... now i am in filter mode. i am thinking of a gel system to cut down on cost, but wonder about them affecting the image. are gels mounted on the rear glass a bother to image quality or complicate focusing or exposure more so than screw ons ? & how do they mount ? & for filters like polarizers that definitely or possibly require varying rotation for the best effect, how do they get properly aligned ? look, remove lens to adjust, look again, etc., until it is right ? filters can get expensive. i would prefer to stick to glass screw on w/ step down rings so 1 size will fit all, but oh ! the cost !! am i overlooking any other considerations i need to have in mind ?
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