AG8

The AG Range

AG8

From: £3,375.00 excl. VAT

The AG8 is the ‘introductory’ model in our Astrograph range. Don’t let the aperture of 200mm make you think that this is a modest performer, for it’s aperture, it’s probably the best reflecting Astrograph available anywhere. If it’s not, we would love someone to correct us.

Carbon fibre tube is one of the keys to the success of this ‘scope, stabilising the focal length throughout an imaging session and staying collimated virtually for ever once set up.

Careful attention has been paid to the design of this and all of the AG’s in the range, exacting engineering and, superb optical components guarantee that once you have set up your AG8 you are ready to transform your opinion of what you are capable of producing in Deep Sky imaging.

The AG8 was the first model we developed and introduced to the range. It proved to be an immediate success because of the amount of development and field trials we carried out with the help of Peter Shah, arguably the UK’s leading Deep Sky imager. Peter was ultra critical both in corrector characteristics and performance and, coupled with stringent tolerances on engineering, these aspects complimented our mirrors to satisfy his, and to date, everybody else’s CCD imaging requirements.

We later developed the current range up to and including the AG16 which is now our second biggest seller, following the AG12 in popularity.

 

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SPECIFICATIONS

AG8 AG10 AG12 AG14 AG16
Primary mirror diameter 200mm 250mm 300mm 350mm 400mm
Focal Length 760mm 950mm 1140mm 1330mm 1520mm
Focal Ratio f/3.8 f/3.8 f/3.8 f/3.8 f/3.8
Focus Distance To Image Plane 79mm 79mm 79mm 79mm 79mm
Tube Weight approx. 6kg approx. 12kg approx. 16kg approx. 24kg approx. 33kg
Tube Diameter 255mm 300mm 350mm 400mm 450mm
Tube Length 635mm 810mm 980mm 1203mm 1320mm
Tube Material Carbon fibre sandwich Carbon fibre sandwich Carbon fibre sandwich Carbon fibre sandwich Carbon fibre sandwich
Secondary Size 90mm 100mm 110mm 120mm 130mm
Mirror Cell CNC Machined alum. 9 point suspension CNC Machined alum. 9 point suspension CNC Machined alum. 9 point suspension CNC Machined alum. 9 point suspension CNC Machined alum. 9 point suspension
Focuser 3″ Crayford with 10:1 reduction 3″ Crayford with 10:1 reduction 3″ Crayford with 10:1 reduction 3″ Crayford with 10:1 reduction 3″ Crayford with 10:1 reduction
Corrector Design 4 lens ED 4 lens ED 4 lens ED 4 lens ED 4 lens ED
Flat Field Size 45mm 50mm >50mm >50mm >50mm
Spot Size on Axis 4.1μm 3.0μm 1.7μm 3.4μm 4.1μm
Spot Size at Field Edge 8.1μm 7.2μm 4.6μm 4.7μm 6.6μm
Mirror / Tube Cooling 3 Controllable fans. Heaters optional 3 Controllable fans. Heaters optional 3 Controllable fans. Heaters optional 3 Controllable fans. Heaters optional 3 Controllable fans. Heaters optional
CNC machined alum. Cradles + Dovetail CNC machined alum. Cradles + Dovetail CNC machined alum. Cradles + Dovetail CNC machined alum. Cradles + Dovetail CNC machined alum. Cradles + Dovetail CNC machined alum. Cradles + Dovetail