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Orion Advanced 16" Astrograph Telescope f3.8 OTA
Orion Advanced 16" Astrograph Telescope f3.8 OTA
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£9,999.00
£6,995.00
(£6,082.60 ex. VAT)
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In Stock!!
The tube is constructed from Carbon Fibre sandwich design - very, very strong to avoid flexing and, zero expansion to ensure the focal plane does not change over long photographic exposures.
To assist cool down of the telescope, each model is fitted with three fans, all positioned behind the primary mirror.
Precise focusing is achieved by the application of our new 3” Crayford focuser on all models. Large bearings are placed in optimum positions to spread the load of the drawtube / corrector and, any camera which will be fitted.
A 10:1 reduction drive is included as standard and, as an option, we can include our electronic drive system with variable speed focusing control.
To produce the remarkably flat photographic field, we have designed and built our Corrected Field Flattener (CFF). This design is based on the Wynne Corrector, often used in similar telescopes. We have taken this design a leap forward and increased the performance over a wider field. Spot sizes are incredibly small and regular across a very wide field (see Specification list for details). The use of specialised ED glass types ensure both colour correction, coma and spherical aberration are optimised to achieve almost a perfect photographic, very wide field. 70mm of back focus allows virtually 100% of modern CCD cameras to be used with auxiliary equipment. The CFF is coated with low loss, multi layer anti reflection coatings to maintain brighter images.
CNC machined mono construction secondary spider and trim ensures stability in collimation. Our unique collimation adjustment system enables perfect collimation of the secondary mirror to be achieved, quickly and reliably.
The main mirror is held in our newly introduced, computer optimised, nine point suspension cell. This balances the mass of the mirror over a much larger area and provides sharper, better defined images
The AG Astrographs are exceptional performers on deep sky. Quality in optical and engineering design and, stringent quality control measures, assures the imaging process is capable of producing some of the finest images ever taken with amateur equipment
Light is the most valuable commodity in telescopes but, all too often it is wasted unnecessarily. As an analogy, high quality optics are comparable to a formula one racing engine. The design is of great importance but, the attention to detail, especially any detail which can improve the power output of the engine is adopted and applied. To achieve all that horse power from a relatively small engine is only possible by applying skills, experience, quality materials, excellent design and innovation. We incorporated all these into Hilux coatings. We wanted to offer you the highest output possible from your telescope, we think we have achieved it. Having said that we do not sit back and relax thinking nothing else can be done. |
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Technical Specifications
| | Orion Astrograph 16 Inch | Aperture: 400mm
Focal Length: 1520mm
Focal Length: f3.8
Focus Distance: 79mm
Tube Weight: 23kg
Tube Diameter: 450mm
Tube Length: 1320mm
Tube Material: Carbon Fibre Sandwich
Secondary Size: 130mm
Mirror Cell: CNC Machined alum. 9 point suspension
Focuser: 3" Crayford with 10:1 reduction
Corrector Design: 4 Lens ED
Flat Field size: 50mm
Spot size on Axis: 4.9µ
Spot size at field edge: 5.2µ
Mirror / Tube Cooling: 3 Controllable fans. Heaters optional
Attachment Method: CNC machined alum. Cradles and Dovetail |
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