Universally applicable variable polarizing filter with 2 "filter thread. This variable polarizing filter allows continuous adjustment of image brightness . This is very helpful to strong contrast differences compensate individually to various observation objects. Especially with the Lunar and planetary observation but also in solar observing this prevents filter a blooming of the finest details. Sun observation only in connection with a suitable sun protection filter! Especially when using a Herschel wedge and with large lens openings, the variable polarization filter can reduce the brightness of the objects to be observed to a comfortable level. The wide control range of 40% to 1% light transmission and the neutral gray filter effect create a pleasant and unadulterated image. Operation is very simple. By turning the two halves of the housing, the desired strength of the filter effect is set. Two-sided 2 "filter thread (inside / outside) yet, the simultaneous use of other color filters. Variable polarizing filter Individually adjustable image brightness Made from highly parallel optical glass Black anodized aluminum housing 2 "filter thread on both sides Dust cover included
