Optical Tube Assemblies
Just the telescope tube without the mount. Build your own custom setup or upgrade your existing one.
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AUD $8,499.99Backorder Available
Out of stock
- 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
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AUD $12,899.00Backorder Available
Out of stock
- 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
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AUD $13,499.00Backorder Available
Out of stock
- 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
Why buy from Sirius Optics
Queensland's largest telescope showroom and warehouse
Run by astronomers and nature lovers, not sales people
Expert advice and lessons
Secure checkout with multiple payment options
30 day returns (T&Cs apply)
