2" Variable Polarizing Filter Series_92° This Finder Scope Base is

This Finder Scope Base is specifically designed to allow you to secure one of Explore Scientific’s high-quality finder scopes to the telescope of your choice

this device will reduce your f-ratio by 0

portable design ideal for both visual astronomy and astrophotography

this engaging kit includes more than 270 pieces as well as a step-by-step instruction manual

and from insects

2" Variable Polarizing Filter Series_92° This Finder Scope Base isUniversally 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