Astronomical Telescope Accessories Deep Space Photography Fishbone Focusing Plate Focusing Mask Fixed Diameter 60-90mm

Material: acrylicThickness: 2mmSupported size range: 60-90mm (there is a 1-2mm error in manual measurement)Colour: BlackNotice:By default, the factory is brand new with a film (transparent film or paper film) to prevent scratches on the surface of the product during transportation. It can be torn off or retained after use.The product has 3 fixing screws, which are used to fix the telescope, which can be set on the outside of the telescope objective lens or inside.When installing, it should be centered. There is no need to emphasize that it should be completely centered. This has no effect on use. The focusing is operated through the focusing seat.It is not recommended to tear off the film during the customer experience test of the purchased