1PC Dia. 15-28mm Doublet Objective Lens for DIY Refracting Achromatic Telescope
Suitable for DIY binoculars, viewing mirrors, star finder, etc.
15F32 blue film
Caliber: 15 MM (actual outer diameter)
Focal length: 32 MM
16F34.5 blue film
Caliber: 16 MM (actual outer diameter)
Focal length: 34.5 MM
22F66.5 blue film
Caliber: 22 MM (actual outer diameter)
Focal distance: 66.5 MM
22F80 blue film
Caliber: 22 MM (actual outer diameter)
Focal distance: 80 MM
23F62 blue film
Caliber: 23 MM (actual outer diameter)
Focal distance: 62 MM
26F37 multi-layer green film
Caliber: 26 MM (actual outer diameter)
Focal distance: 37 MM
26F102 blue film
Caliber: 26 MM (actual outer diameter)
Focal distance: 102 MM
28F100 green film
Caliber: 28 MM (actual outer diameter)
Focal distance: 100 MM
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