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Supplied as a standalone optical tube, the Bresser MC 100/1400 Messier Maksutov OTA provides a 100mm Maksutov-Cassegrain system with 1400mm focal length and Vixen-style mounting.
- Standalone 100mm Maksutov optical tube
- 1400mm focal length uses f/14 optics
- 26mm image circle supports listed coverage
- Internal mirror focuser provides focus adjustment
- 26mm eyepiece and Vixen dovetail included
- Red dot finder requires CR2032 battery
Featuring a 102mm FCD100 triplet, the Explore Scientific AP 102/714 ED FCD-100 CF Hexafoc combines a 714mm focal length with carbon fiber construction and a 2.5-inch Hexafoc focuser.
- 102mm aperture provides 1.13-arcsecond resolution
- 714mm focal length uses f/7 optics
- Triplet objective uses Hoya FCD100 glass
- 2.5-inch focuser provides 10:1 adjustment
- 2-inch diagonal and 10-year warranty included
Designed around Hoya FCD100 glass, the Explore Scientific AP 127/952 ED FCD-100 CF Hexafoc combines a 127mm triplet objective with carbon fiber construction and a 2.5-inch focuser.
- 127mm aperture provides 0.91-arcsecond resolution
- 952mm focal length uses f/7.5 optics
- Carbon fiber tube uses FCD100 glass
- 2.5-inch Hexafoc provides 10:1 adjustment
- Cradle rings and 10-year warranty included
For compact wide-field imaging, the Explore Scientific AP 80/480 ED Alu OTA Refractor combines an 80mm FCD1 triplet with 480mm focal length and a lightweight aluminum tube.
- 80mm aperture provides 1.45-arcsecond resolution
- 480mm focal length uses f/6 optics
- FCD1 triplet objective uses Hoya glass
- 2.0-inch focuser and Vixen plate included
FPL-53 ED optics give TS Optics Photoline AP 102/714 OTA a balanced imaging and visual configuration, combining 102mm aperture, 714mm focal length, f/7 optics, full-frame flattener compatibility, dual-speed focusing, Vixen mounting, rings, and adapters.
- 102mm apochromatic ED doublet
- 714mm focal length, f/7.0 optics
- Ohara FPL-53 ED element
- 2.5-inch dual-speed rotatable focuser
Supplied as an independent optical tube, the Bresser AC 90/500 Messier Refractor OTA provides a 90mm short-tube refractor with 500mm focal length and Vixen-style mounting hardware.
- Standalone 90mm short-tube optical assembly
- 500mm focal length uses f/5.6 optics
- 30mm image circle supports listed coverage
- 2.5-inch Hexafoc focuser supports accessory changes
- 26mm eyepiece and tube rings included
- Vixen dovetail supports independent mounting
Designed as a short-tube optical assembly, the Bresser AC 127/635 Messier Hexafoc Refractor OTA combines a 127mm aperture with 635mm focal length and a 40mm image circle.
- 127mm aperture supports listed rich-field applications
- 635mm focal length uses f/5 optics
- 4-lens short-tube configuration is specified
- 40mm image circle supports rich-field coverage
- 26mm eyepiece provides listed 24x magnification
- 10kg minimum mount capacity is specified
Designed as a flat-field optical tube, the Celestron EdgeHD-SC 203/2032 Cassegrain OTA combines a 203.2mm EdgeHD Schmidt-Cassegrain system with 2032mm focal length and Fastar compatibility.
- 203.2mm aperture provides 0.57-arcsecond resolution
- 2032mm focal length uses f/10 optics
- Fastar and HyperStar compatibility is specified
- 40mm eyepiece and Vixen rail included
As a large-aperture imaging tube, Skywatcher N 305/1500 Explorer 300PDS OTA provides 305mm parabolic optics, 1500mm focal length, f/4.9 performance, dual-speed focusing, Losmandy mounting, finder, rings, and optional coma correction.
- 305mm PDS parabolic Newtonian
- 1500mm focal length, f/4.9 optics
- 2-inch dual-speed Crayford focuser
- Losmandy-style dovetail mounting
- Mount not included
Manual equatorial control supports Vixen R130Sf N 130/650 Advanced Polaris AP Telescope, combining 130mm parabolic optics, 650mm focal length, f/5 performance, AP mounting, slow-motion controls, finder, tripod, counterweight, and eyepieces.
- 130mm parabolic Newtonian reflector
- 650mm focal length, f/5.0 optics
- Advanced Polaris manual equatorial mount
- Includes finder, tripod, eyepieces
A carbon-fiber Ritchey-Chrétien system defines TS Optics Pro RC 304/2432 Carbon Ritchey-Chretien OTA, combining 304mm aperture, 2432mm focal length, f/8 optics, hyperbolic mirrors, 35mm native coverage, large-format compatibility, and dual dovetail mounting.
- 304mm Ritchey-Chrétien optical system
- 2432mm focal length, f/8.0 optics
- Coma-free all-reflective design
- 3-inch dual-speed linear focuser
- Dual Losmandy-style dovetails
For high-load equatorial integration, the Meade ACF-SC 355/2845 UHTC LX850 OTA provides a 356mm ACF optical tube with 2845mm focal length and Losmandy-style mounting.
- 356mm aperture provides 0.32-arcsecond resolution
- 2845mm focal length uses f/8 optics
- UHTC coatings support the optical system
- Losmandy rail and 26mm eyepiece included
Compact Japanese apochromatic optics define Vixen SD81S II AP 81/625 OTA, combining 81mm SD doublet optics, 625mm focal length, f/7.7 performance, full-frame field coverage, heavy-duty focusing, Vixen mounting, finder, flip mirror, and rings.
- 81mm apochromatic SD doublet
- 625mm focal length, f/7.7 optics
- 44mm full-frame field coverage
- Includes finder, diagonal, rings
- Mount not included
Supplied as a standalone optical tube, the Meade ACF-SC 152/1524 UHTC OTA provides a 152mm ACF system with 1524mm focal length and UHTC coatings.
- 152mm aperture provides 0.76-arcsecond resolution
- 1524mm focal length uses f/10 optics
- ACF design uses UHTC coatings
- Vixen dovetail and 8x50 finder included
For independent mount integration, the Meade ACF-SC 304/2438 UHTC OTA provides a 304mm ACF optical tube with 2438mm focal length, UHTC coatings, and Losmandy-style mounting.
- 304mm aperture provides 0.38-arcsecond resolution
- 2438mm focal length uses f/8 optics
- Primary mirror lock is included
- Losmandy rail and finder included
Portable manual observing defines Vixen R130Sf N 130/650 Porta-II Telescope, combining 130mm parabolic optics, 650mm focal length, f/5 performance, Porta II mounting, dual slow-motion controls, finder, tripod, and eyepieces.
- 130mm parabolic Newtonian reflector
- 650mm focal length, f/5.0 optics
- Porta II manual alt-azimuth mount
- Includes finder, tripod, eyepieces
- Dual slow-motion worm gears
Computerized Sphinx tracking defines Vixen SD115S AP 115/890 Sphinx SXP2 Starbook Ten GoTo, combining 115mm SD doublet optics, 890mm focal length, f/7.7 performance, SXP2 mounting, STAR BOOK TEN control, finder, diagonal, and counterweights.
- 115mm apochromatic SD doublet
- 890mm focal length, f/7.7 optics
- Sphinx SXP2 computerized GoTo mount
- STAR BOOK TEN controller included
- Includes finder and counterweights
With a 254mm aperture and 2032mm focal length, the Meade ACF-SC 254/2032 UHTC OTA provides an ACF optical tube with primary mirror locking and Losmandy-style mounting.
- 254mm aperture provides 0.45-arcsecond resolution
- 2032mm focal length uses f/8 optics
- Primary mirror lock supports tracking stability
- Losmandy rail and 26mm eyepiece included
- 8x50 finder and diagonal included
A 406mm Ritchey-Chrétien system defines TS Optics RC 406/3250 Carbon Ritchey-Chretien OTA, combining 3250mm focal length, f/8 optics, hyperbolic mirrors, carbon truss construction, 35mm native coverage, large-format compatibility, dual Losmandy mounting, and a 3-inch focuser.
- 406mm Ritchey-Chrétien optical system
- 3250mm focal length, f/8.0 optics
- Coma-free all-reflective design
- 3-inch dual-speed linear focuser
- Dual Losmandy-style dovetails
Designed for lighter mount integration, the Meade ACF-SC 203/2032 UHTC LX65 OTA provides a 203mm ACF optical tube with 2032mm focal length and Vixen-style mounting hardware.
- 203mm aperture provides 0.57-arcsecond resolution
- 2032mm focal length uses f/10 optics
- UHTC coatings support the optical system
- Vixen dovetail and 26mm eyepiece included