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1 x 2" to 1.25" Metal Eyepiece Adapter - Durable Brass Protective...

D30 mm Bonded Lens for DIY Telescopes Achromatic with Optional Diameters and...

50mm Refractive Double Separation Lens for Telescopes and Viewfinders (D50F360)

60mm Refractive Astronomical Telescope Lens with Single Sided Blue Film for DIY Telescopes F300-F900mm(D60F600)

High Precision K9 Optical Reflector Lens - Square/Round, Aluminium Coated, Pack of...

Green Film Achromatic Lens Bonded D80 mm for DIY Astronomical Telescopes -...

1 x Newtonian Parabolic Reflector Primary Mirror D130F650 with 35mm Secondary - AR0948(D130F650+35mm)

Germanium Lens with AR+DLC Coating - Optical/Thermal Image Thermometer Observation Window 1...

1 x Parabolic Reflector Lens D114F450 High Precision Primary and Secondary Mirror...

Focus Ring Set for 1.25 Inch Telescope Eyepiece - 3 Piece Precision...

60mm Refractive Astronomical Telescope Lens with Single Sided Blue Film for DIY Telescopes F300-F900mm(D60F700)

High Precision K9 Optical Reflector Lens - Square/Round, Aluminium Coated, Pack of...

850nm High Transmittance Optical Glass Filter Lens - Visible Light Cutting, Narrow...

Gallium Arsenide Optical Lenses Sheet Focusing for Strong Light Applications, 1PCS, Multiple...

Germanium lens with AR+DLC coating for Thermal Imager and Optical Applications -...

60mm Refractive Astronomical Telescope Lens with Single Sided Blue Film for DIY Telescopes F300-F900mm(D60F360)

Gallium Arsenide Optical Lenses Sheet Focusing for Strong Light Applications, 1PCS, Multiple...

1 Newton D150F750 Parabolic Reflector Primary Mirror and Secondary 35 mm for...

Green Film Achromatic Lens Bonded D80 mm for DIY Astronomical Telescopes -...

Achromatic Lens D40 for DIY Refractive Telescope Diameter 40 mm, Focal Length...

D106F600 D106F900 Double Film Lens for Astronomical Telescopes - 106 mm Diameter...

60mm Refractive Astronomical Telescope Lens with Single Sided Blue Film for DIY Telescopes F300-F900mm(D60F400)

High Precision K9 Optical Reflector Lens - Square/Round, Aluminium Coated, Pack of...

Achromatic lens D70 mm for DIY astronomical telescope (Focal options: 400mm, 280mm,...

Germanium Lens with AR+DLC Coating - Optical/Thermal Image Thermometer Observation Window 1...

Newton D305F1200 Parabolic Reflector Primary Mirror, 305 mm Aperture, 1200 Focal, for...

Germanium lens with AR+DLC coating Imager thermometer viewing window Optical/Thermal 1 piece (30x1mm AR+DLC)

Double Convex K9 Optical Glass Lens, Diameter 20-58mm, Focal Length 40-200mm.(D26.9 F50 C5.4 E2)

Short axis secondary mirror for DIY reflection astronomical telescopes (20 to 70...

DIY Astronomical Telescope Lens Set for 70 mm and 80 Telescopes Convexoconcave...