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To give a new dimension to dedicated deep sky astro photographers, we have introduced our AG range of high end Astrographs.

Apertures available are:

AG8 200mm
AG10 250mm
AG12 300mm
AG14 350mm
AG16 400mm

All are based on the same optical design and all have a focal ratio of f3.8.

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.
 

Scroll down for Model Specifications

Good images need good optics, all fitted in reliable, stable and precise engineering.

The mirrors in our AG range are hand figured to Lambda / 8 or better.

Both mirrors are supplied with our enhanced Hilux reflective coatings giving up to 25%brighter images than conventional coatings.

A full Zygo report of the main mirror is issued from our optical laboratory and is provided with each telescope.

Mounts for AG:

Prices quoted are for Optical Tube Assembly only. Carbon Tubes come complete with 3" Focuser, Finder, Cradles and Dovetail.

We recommend the following Mounts for AG Tubes:

AG8: Vixen SX or SXD

AG10: Vixen SX or SXD

AG12: Vixen SXD

AG14: Vixen Atlux or GAIAX

AG16: Vixen Atlux or GAIAX

Illustration above shows original concept drawing.

* If Electronic focus control is purchased - 10:1 Focuser not supplied.