ODK12
The ODK Series
ODK12
From: £5,475.60 excl. VAT
The ODK12 and all the range is based on a focal ratio of f6.8, fast enough for some superb deep sky photo-visual use and, still have enough focal length for high resolution planetary work both visual and CCD applications.
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. Being an open tube design and very short, cool down times are remarkably fast.
Images from the ODK12 are spectacular, visit our image gallery and view some of them here.
Visually it offers you views of the planets which you will find incredible. The high resolution of the instrument across the whole of it’s field ensures planets at the centre or stars, right to the edge, are incredibly sharp and crisp. A result of the computer enhanced design followed by skilful hand finishing by skilled opticians.
SPECIFICATIONS
ODK10 | ODK12 | ODK14 | ODK16 | |
---|---|---|---|---|
Primary mirror diameter | 250mm | 300mm | 350mm | 400mm |
Focal Length | 1700mm | 2040mm | 2380mm | 2720mm |
Back focal distance from the back of the mirror cell +-1mm | 213mm | 218mm | 210mm | 216mm |
Focal Ratio | f/6.8 | f/6.8 | f/6.8 | f/6.8 |
Tube Weight | approx. 12kg | approx. 19kg | approx. 26kg | approx. 36kg |
Tube Diameter | 300mm | 350mm | 400mm | 450mm |
Tube Length | 475mm | 615mm | 700mm | 820mm |
Tube Material | Carbon fibre sandwich | Carbon fibre sandwich | Carbon fibre sandwich | Carbon fibre sandwich |
Secondary Size | 96mm | 120mm | 136mm | 152mm |
Mirror Cell | Honeycombe CNC machined alum. cell | Honeycombe CNC machined alum. cell | Honeycombe CNC machined alum. cell | Honeycombe CNC machined alum. cell |
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 |
Corrector Design | Multi coated 3 lens | Multi coated 3 lens | Multi coated 3 lens | Multi coated 3 lens |
Flat Field Size | 50mm | > 52mm | > 52mm | >52mm |
Spot Size on Axis | 3.5μm | 1.8μm | 2.1μm | 2.4μm |
Spot Size at Field Edge | 6.2μm | 5.6μm | 5.6μm | 6.0μm |
Mirror / Tube Cooling | 3 Controllable fans. Heaters optional | 3 Controllable fans. Heaters optional | 3 Controllable fans. Heaters optional | 3 Controllable fans. Heaters optional |
Attachment Method | CNC machined alum. dovetail with supports | CNC machined alum. dovetail with supports | CNC machined alum. dovetail with supports | CNC machined alum. dovetail with supports |