2 inch coma collector for Newton for both photo and visual use []AstroStreet

2 inch 50.8mm diameter coma corrector Requires a back focus of approximately 75mm±5mm from the rear edge of the lens to the sensor position. The image will be magnified approximately 1.1 times. Comes with M48-T2 screw adapter ring, allowing for shooting via T-ring (please prepare separately) A 2-inch sleeve part is also included, so you can use the eyepiece as is. GSO's 2 inch 50.8mm diameter top collector. *Taiwan GS is a very famous OEM manufacturer that continues to supply extremely high quality parts to the world's top brand telescope manufacturers. Dramatically improves coma aberration of short focus Newtonian telescopes. It seems to be optimized for F4.5 Newtonian telescopes, but it is said to perform well up to F3-F6. It has a photo-visual design that is compatible with both photography and visual viewing, and has been highly rated for both performance and usability. The product details are: 1) Collector lens body (2 inch sleeve diameter, M48 male thread connection, M48 filter screw at the tip) 2) 2 inch sleeve parts (M48 connection, brass ring tightening type, 2 fixing screws) 3) M48-T2 thread adapter ring. When using it for photography, it is connected to the camera body via the 1->3->T ring, and for visual viewing, it is connected to the 1->2->eyepiece. The lens is composed of 4 elements in 2 groups and is fully multi-coated with very high quality, and has an effective aperture of approximately 44mm, making it compatible with full-frame cameras for photography and wide-angle eyepieces for visual viewing.The optimal distance from the rear end of the lens to the image plane is approximately 70mm. In addition to its performance, the aluminum anodized housing also gives it a very luxurious feel. This product has a very high reputation and has many good reviews. [Sleeve diameter] 2 inches (50.8mm) Made in Taiwan