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 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 TPU. The Lens Cap is an essential item that should be in every camera bag or telescope case. | 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.