This filter is a very good investment in two important ways:
Band elimination filters also known as vapor or haze filters is not only a universal filter one of a kind but creates visible improvement on any of your images regardless of the film. It also protects a cameras lens from mechanical damaging.
The Filter absorbs the short wave parts of the interfering spread light so that by existing haze a differentiated rendition is possible.
UV light and it's strong spreading leads to areas on the image that seem out of focus in the long shot and a possible blue tint of the image. The filter eliminates these effects.
A speed prolongation is not necessary. This filter is color neutral.
All Heliopan filters marked "Special Order Item" will be manufactured for you upon purchase. Usually it takes about two weeks until we can ship the filter. Please note that these filters cannot be returned as we cannot disassemble them again after they have been made for you.
Even Heliopan only keeps stock of about 20% of their ultra wide range of filters. The rest is produced here in Germany (Munich) upon request.