How do I find the right filter for my telescope, spotting scope, or binoculars?
To find the right filter, type your telescope, spotting scope, or binoculars make and model into the search box at the top of the website, then click search. You will get a list of search results that match the search you entered. You may get more than one result because many model numbers and scope sizes overlap. Click on each of the results to find the right model for you. Be sure your telescope, spotting scope, or binoculars are listed in the list of models the item you are viewing will fit. If you do not find your telescope or other optical device, then you will need to measure the optical tube diameter of your telescope or other optical device to determine the best size filter to order.