1pc 60mm Refractive Astronomical Telescope Objective Lens with Single-Sided Blue Film - Focal Length Options 300-900mm(D60F300)

Description

• 60mm refractive objective lens devised for DIY astronomical telescopes, enhancing your stargazing experience.
• Available focal lengths of 300mm, 360mm, 400mm, 500mm, 600mm, 700mm, 800mm, and 900mm to suit various astronomical needs.
• Features a single-sided blue film coating for improved light transmission and image clarity, ensuring stunning visuals of objects.
• Precision-engineered with a diameter tolerance of +0/-0.12mm and a center thickness tolerance of 0.2mm for optimal performance.
• Includes two refraction double separation objective sets, making it ideal for both telescope objectives and star finders.

Refractive astronomical telescope objective lens D=60mm
Diameter: 62mm
The focal length F: 300,360,400,500,600,700,800,900 mm Optional
Coating: single-sided blue film
Combined image :1/4-1/8
Diameter tolerance :+0/ -0.12mm
Center thickness tolerance :0.2mm
Focal length tolerance :0.1%
Finish :60/40
Eccentric :1'
Note: two refraction double separation objective sets; Used for astronomical telescope objective and star finder.

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