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Objective Lens， 72 73mm Telescope Cemented Doublet Objective Lens Achromatic DIY Optical Lenses Focal Length 280mm 700mm,for Doublet Convex Lens(73F400B)
5.0 (44 items)
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New $76.59
Product details
| Management number | 219364894 | Release Date | 2026/05/03 | List Price | $30.64 | Model Number | 219364894 | ||
|---|---|---|---|---|---|---|---|---|---|
| Category | |||||||||
=========High-concerned chemical : NoneModel Number : 72 73mm Cemented Doublet LensMaterial : Glass
- Made optical glass with precision polishing, ensuring stable performance and long service life.
- This 72mm & 73mm cemented doublet objective lens offers 280mm and 700mm focal lengths, designed as an achromatic optical part for DIY astronomical telescopes.
- The achromatic cemented structure effectively corrects chromatic aberration, delivering sharp, high-contrast images for moon and celestial observation.
- Made of high-grade optical glass with fine polishing, it ensures high light transmittance, low distortion and stable optical performance.
- Two optional focal lengths satisfy different observation demands, suitable for telescope assembly, modification and upgrading projects.
- Standard caliber and simple structure allow easy installation, making it an ideal core lens for astronomy enthusiasts and homemade telescopes.
| Item Weight | 1.76 ounces |
|---|---|
| Manufacturer | Generic |
| Item model number | OBFBVOBOB-35CD792E |
| Product Dimensions | 3.94 x 3.94 x 3.94 inches |
| Manufacturer recommended age | 1 - 1 months |
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