Optical Tube Assemblies

This short-tube refractor telescope has wide field views, thanks to its achromatic objective lens of 80mm and focal length of 400mm.

• Experience our best optical performance with EdgeHD’s aplanatic, flat field Schmidt-Cassegrain optics for pinpoint stars all the way to the edge of today’s largest imaging sensors and widest eyepieces
• Aluminum optical tube with tube vents featuring an integrated 95-micron mesh filter allows hot air to be released from behind the primary mirror. Mirror support knobs hold the mirror in place and reduce image shift during imaging
• Versatile design accommodates 3 focal ratios: native f/10, f/7 with the addition of a focal reducer, or ultra-fast f/2 imaging with a removable secondary mirror and third-party accessories
• Celestron’s premium StarBright XLT coatings provide maximum light transmission
• A 9x50 finderscope, 2” mirror diagonal for more comfortable viewing, and wide-angle 23 mm Luminos 2" eyepiece are all included

• 14" Schmidt-Cassegrain Optical Tube Assembly (OTA)
• Features Celestron's premium patented StarBright XLT optical coatings
• 3910mm focal length (f/11)
• Fastar compatible
• Tube constructed of durable and lightweight aluminum
• Includes: 40mm eyepiece (98x), 9x50 optical finderscope, 2” star diagonal, 2” visual back, CGEM-style dovetail bar

• Fast, wide-field 11” f/2.2 optical design with rare-earth glass for images free of false color, coma, and field curvature
• Large 43.3mm optimized image circle maintains pinpoint stars to the far corners of even the largest astroimaging sensors, while the usable field extends even further to 52mm for larger format sensors
• New Ultra-Stable Focus System (USFS) minimizes focus shift and mirror flop
• Integrated air-cooling system features a quiet, high-output 12V MagLev fan and vents with mesh filters to prevent dust ingress
• Common camera adapters (T-thread and M48) included for easy attachment to popular CCD and DSLR cameras

• 11" Schmidt-Cassegrain Optical Tube Assembly (OTA)
• Features Celestron's premium patented StarBright XLT optical coatings
• 2800mm focal length (f/10)
• Fastar compatible
• Tube constructed of durable and lightweight aluminum
• Includes: 40mm eyepiece (70x), 9x50 optical finderscope, star diagonal, 1.25” visual back, CGEM-style dovetail bar

NOTE: For solar observing the recommended solar filter is the Astrozap Glass solar filter 308-314 mm (Product Number 124447). This solar filter is a perfect fit for this OTA. 

• Air-spaced triplet optical design
• Japanese made Hoya FCD100 optics
• Advanced chromatic aberration correction
• ED glass
• EMD enhanced multi-layer deposition
• Dual-speed focuser

• Air-spaced triplet optical design
• Japanese made Hoya FCD100 optics
• Advanced chromatic aberration correction
• ED glass
• EMD enhanced multi-layer deposition
• Dual-speed focuser

9.25" Schmidt-Cassegrain Optical Tube Assembley

Aluminum Optical Tube

Celestron's premium StarBright XLT coatings

2350 mm focal length (f/10)

25 mm eyepiece included (94x)

Visual back allows for use with 1.25" accessories

6x30 finderscope to help accurately find objects

Star diagonal provides more comfortable viewing position when observing objects that are high in the sky

Includes dovetail rail compatible with CGE mount

For customers wishing to fit solar filters, the outside OTA diameter is 272 mm.

NOTE: For solar viewing the Astrozap Glass Solar filter (Product No. 124446) is recommended.