The Lens Cap for ZWO Seestar S50 is a must-have accessory for any photographer or stargazer. Crafted with precision to fit snugly on the lens of your telescope, this lens cap provides ultimate protection against dust, debris, and scratches. | Bahtinov mask for use in the ZWO Seestar S50 telescope, which will allow the user to achieve perfect focus. Currently the firmware does not allow for manual focus, but it's rumored to be a future feature. Push the Bahtinov mask into the front opening of the ZWO Seestar S50 telescope. The Bahtinov mask produces a spiked image when looking at a bright star. Adjusting the focus moves the spikes in the image until you get a perfect X with a spike going through the exact center of the X. That's when you know you have perfect focus. | Accessories for ZWO Seestar S50 made of plastics.The Lens Cap is an essential item that should be in every camera bag or telescope case.You can get work with a small strip of masking tape on the rim. | Packaging content:1pcs Cap Cover (Fit in the off position will also fit into foam carry case)；1pcs Bahtinov Mask | OUR PROMISE In the unlikely event you are not pleased with your purchase, neither are we! Please contact us and we will go out of our way to fix it.