1pc Double Separated Blue/Green Film Objective Lens for Astronomical Telescopes - 106mm D, 600mm/900mm Focal Length Options(Metal Objective Holder)

Description

• Optics: The D106F600 and D106F900 objective lenses feature multi-layer blue and green film coatings, providing superior light transmission and image clarity for astronomical observations.
• Versatile Focal Length Options: Choose between 600mm and 900mm focal lengths to suit your astronomical viewing needs, enhancing your telescope's performance for stargazing and planetary observation.
• Durable Construction: Made with an aluminum alloy base and oxidized black surface treatment, these lenses are devised for longevity and stability, ensuring reliable performance in various conditions.
• Easy Installation: devised to fit directly onto a 110mm PVC pipe, the objective holder allows for straightforward assembly, making it ideal for DIY telescope projects and upgrades.
• Precision Engineering: With a diameter tolerance of +0/-0.12mm and a combined image rating of 1/4-1/8, these lenses provide exceptional accuracy and detail for serious astronomy enthusiasts.

Refractive astronomical telescope objective lens D=106mm
Diameter: 106mm
The focal length F: 600mm Blue Film / 600mm Green Film / 900mm Blue Film/900mm Green Film Optional
Coating:
D106F600 Multi-layer blue film coating: four-sided multi-layer blue film;
D106F600 Multi-layer green film coating: four-sided multi-layer broadband film (400-700nm)
D106F900 Multi-layer blue film coating: four-sided multi-layer blue film
D106F900 Multi-layer green film coating: four-sided multi-layer broadband film (400-700nm)
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 refracting double separation objective groups, which are used for astronomical telescope objectives and collimating objectives.

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