Eyepiece Container

How to Select a Bolt Case for your Eyepiece:

Measure the maximum diameter (usually the upper part of the eyepiece barrel) and length of your eyepiece. Then select the closest bolt case that is slightly larger than both these dimensions by using this bolt case dimension and eyepiece compatibility table. If you have an eyepiece that we sell, visit that eyepiece page on our website and select the "Specifications" tab to see which bolt case will fit it.

Note that the first number in bolt case model refers to the maximum inner diameter and the second number refers to its minimum inner length (without foam inserts). The inner length is variable for all bolt cases. Here's an example. Let's assume that you measure the maximum diameter of an eyepiece to be 34mm and its length to be 70mm. In this case, the 37x60 bolt case would work well.