1pc D40 Achromatic Objective Lens for DIY Refractive Telescope - 40mm Diameter, 205mm Focal Length, Blue Film Coated(42F100 Blue Film)

Description

• 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.

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

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