D40 achromatic objective lens devised for self-made refractive telescopes, ensuring clear and sharp images.
Features a 40mm actual diameter and a focal length of 205mm, perfect for amateur astronomers and telescope enthusiasts.
Coated with an adhesive blue film, this lens minimizes chromatic aberration for improved optical performance.
Easy to install with clear assembly instructions; thin side faces the scene while the thick side faces the mirror tube.
Ideal for enhancing your DIY telescope projects, making it a must-have accessory for astronomy lovers.
Description
Assembly precautions: Assembly direction, the thin side of the lens towards the direction of the scene and the thick lens towards the direction of the mirror tube.
1 Pcs/Package