Heliopan 62mm Slim Mount, Wide Angle Circular Polarizer Filter.

Heliopan
Heliopan 62 Slim Mount Filter: Picture 1 thumbnail Heliopan 62 Slim Mount Filter: Picture 2 thumbnail Heliopan 62 Slim Mount Filter: Picture 3 thumbnail

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About Heliopan 62 Slim Mount Filter

Polarizing filters, are color neutral and increase picture taking possibilities with black and white or color film. In color photography, unlike black and white photography, there is no possibility to change contrast or color saturation with colored filters. To do so would also change the colors in the photograph. Natural light spreads in a wave form in all direction. Sunlight is polarized and has a high color purity. When passing through the atmosphere a part of it is scattered, which results in a blush gray haze over all colors. This effect can be reduced or eliminated by using polarizing filters. If, in addition, light falls at an angle of approximately 35° onto a reflecting surface, e g. water, glass, plastic, color surfaces, with the exception of metallic surfaces, the light becomes reflected and polarized. If one uses a properly orientated polarizing filter, the reflections are absorbed and the true colors can reach the film. Water surfaces become transparent and clouds are more saturated.

The light loss of a polarizing filter varies between 1 and 1.5 F stops which, depending on camera type, can be manually or automatically corrected. HELIOPAN polarizing filters consist of a neutral color foil cemented between two plane parallel glass discs. The foil is constructed so that light rays can only pass in one plane. The polarizing filter is mounted in a calibrated rotating ring so the desired position and effect can be easily set. With an SLR one sees the result in the finder, with viewfinder type cameras one holds the polarizer in front of the eye and turns it to see the desired effect. Then with the assistance of the calibrated rim, which is on every HELIOPAN polarizing filter, it is easy to set the filter to the same position on the lens. If no effect is visible, the available light conditions can not be polarized. In this case its use is not advisable.

In principle there are two different kinds of polarizer's, linear and circular. The circular is required with camera systems where the built-in light measuring system uses light that has passed through the mirror via a beam splitter. In this case the light is already partially polarized, on all AF-cameras. Using linear polarizing filters cause in correct focusing measurements. The circular polarizer has a second component, a 1/4 wave plate in its construction. The polarized light is set in rotation by this plate and can therefore pass without interruption through the measuring system and give proper measurements.

Circular polarizer's are also recommended with the auto focus lenses in video cameras. Over heating of the polarizing filter should be avoided.

Heliopan 62 Slim Mount Filter Features

  • With a construction with an extremely thin rim of only 5mm! This eliminatesthe possibility of vignetting when using wide angle lenses or zoom lenses attheir wide angle setting! As with this new design there are no front filterthreads a push-on lens cap is available to protect the filter

Heliopan 62 Slim Mount Filter Reviews

Reviewed by 1 customers

(1 of 1 customers found this review helpful)

 
4.0

Takes your photos to a new level

By

from Ypsilanti, MI  -  Casual user

Used with 18-250MM lens, shooting structures (homes mostly). I use it primarily to block out reflections in windows and produce more contrasting, richer colors, and also to protect the lens. I'm impressed by the quality. Rings are factory marked with numbers, which is nice. Just testing it out on my LCD at home, I achieved nearly 100% polarization (screen almost entirely black). This is the thinnest filter I could obtain, but it still vignettes at 18mm on my lens (not as bad as others I have tried though). There may be no solution but to get a step up ring and move to to a larger filter. It also appeared to have been used, as there was quite a bit of grime on the edge of the glass and the ring appears to have been scratch-marked by the previous owner. I would recommend this to a friend, but only if it were new and not used with a lens like mine. But as for the filter quality, it's top notch. Just be aware that even if the description claims to not vignette, it's no guarantee.

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