It fits all rear cells of Schmidt-Cassegrain telescopes equipped with a big 2 inch focuser and can use with refractor telescopes with not included SCT adapter which you can find in our store;
Allows you to take advantage of the wider field of view provided by two inch eyepieces; dielectric coatings are more durable than regular or enhanced aluminum coatings so you will enjoy years of excellent performance from this product;
Associated with 90 degree mirror diagonals which let you view objects that are at a 90 degree angle from the direction the telescope is pointing;
This variable polarizing filter has a Aluminium material mount; which makes it difficult to be broken
These filters have a very large range of effectiveness; Light transmission of polarizing filters is between 1% and 40%; Such adjustable control is highly desirable for lunar observing as the Moon's brightness varies with its phase and also with the aperture and magnification of the telescope you are using; It is also a must for viewing the Moon in daylight hours