Orion Optics (UK) OMC140 Deluxe Maksutov Cassegrain OTA
I purchased this bespoke Maksutov Cassegrain OTA about 2 years ago. Here are the specifications:
- Primary Mirror Diameter – 150mm
- Aperture – 140mm
- Secondary Mirror Diameter – 44mm
- Focusing Method – 100% zero image shift micro focuser
- Mirror Coating – Hilux coating on both mirrors
- Tube Length – 450mm
- Tube Material – Carbon Fibre
- Focal Length – 2000mm
- Focal Ratio – f/14
- Tube Weight – only 3.5kg
- Mount Fixing – Standard Vixen Dovetail
- Wavefront Optics – close to 1/7PV (view test certificate)
- Premium red dot finder
- William Optics 1.25" carbon fibre dielectric diagonal
I quote this from the agent's website:
"Looking for something Ultra Special ? You have just found the best Cassegrain telescope on the market globally.
Exceptional resolution and sharpness from a hand crafted bespoke custom telescope for the most demanding and discerning astronomy enthusiasts.
Note: This is an Orion UK Ltd telescope, not to be confused with Orion, USA (which is manufactured in China). The two names are similar but their products are totally different!
Orion UK Ltd are a specialist bespoke supplier & hand craft some of the best telescopes available globally, their products feature simply exceptional world renowned superior optics.
The design is not a standard all spherical one with a main mirror the same size as the corrector. That is the traditional Maksutov design but, it lacks off axis performance and suffers from coma. The OMC140 has an ellipsoidal primary which is over 12mm larger in diameter than the Maksutov corrector. This added aspherisation of the primary allows much wider flatter fields to be achieved but it virtually eliminates coma.
See attached photos. I've also included one showing a 2" WO diagonal attached (for illustration only, not included)
