ASA 12N-AAF3 12" F3.6 Astrograph

ASA Astrographs – High Quality, Stable, Perfect

ASA Astrographs have been developed with the help of experience from some of the leading astrophotographers of our time. The correctors are designed by Dipl. Phys Philipp Keller and have been perfected by use of high end materials. ASA Astrographs offer perfect image performance over a large field of view, are lightweight but stiff and have very fast focal ratio.

The tube is produced using high grade carbon fibre with internal velvet flocking. The carbon construction offers very low thermal expansion and great rigidity. This ensures that focus is very stable and there is no detectable tube flexure. As standard, the telescope is supplied with the AAF3 3" Motorised focuser which has a load capacity of 9kg. This focuser features an absolute encoder for stepless precision.

The ASA Astrograph has a very fast focal ratio. This offers good signal to noise ratio with short exposure times. Through the uncompromising optical design of Philipp Keller, the corrector lens system deployed can handle large format sensors. Even the largest sensors will have perfect correction all the way to the corners.

The N-Series Astrograph employs a parabolic main mirror with a focal ratio of F3.6. by switching the corrector lens system, the focal length of the telescope can be shortened or extended with minimum effort.

With the supplied 3” Wynne corrector, F3.6 is achieved. By using the 2” Reducer, this is lowered to only F2.75. By adding the 2” Barlow, the focal ratio increases to F6.8.

All ASA Astrograph optics are now manufacured in house by ASA to the highest standards. You will find no better reflective optics.

DEMONSTRATION

In order to demonstrate the superior performance of an ASA based system, we are able to offer potential customers a demnstration using our 10" ASA Astrograph. This is installed at our remote hosting partner e-Eye. Please contact us for details.

Specifications

Aperture                                  12” / 300mm

Focal Length                            1140mm

Corrector                                  3” Wynne

Secondary                               120mm

Focuser                                    OK3 Motorised 3”

Tube Length                             990mm

Tube Diameter                          360mm

Weight                                      16kg

Performance with Correctors                                            

                                                Lenses       Image Circle        Aperture Ratio           Weight

3” Wynne Corrector               3                    50mm                         F3.6                      780g

3” Reducer                             4                    30mm                         F2.75                    720g

2” Barlow                               5                    35mm                         F6.8                      315g