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Dobsonian OD400 Specification:

1/4PV Optics with Standard Coatings
9 Point Mirror Cell
2" Focuser
30mm Finder
25mm Plossl Eyepiece

 Model dimensions

Total telescope weight 49Kg
Tube weight only 29Kg
Tube diameter 434mm
Tube length 1580mm
Focal Length 1600mm
Focal ratio f4
(Weights approx.)

400mm f4 Dobsonian
complete with Mount & Tube Rings

The Best Just Got Bigger

The OD400 is the ideal choice of our models for observers wishing to own a high performance large Dobsonian with a 400mm aperture and produce the best images available anywhere, at any cost, in a Dobsonian telescope of this size.
This we unconditionally guarantee.

The tube fits in many family cars with the passenger seat folded down. And as shown earlier, the mounting 'collapses' in to an incredibly small amount of space. The mounting is made from aluminium plate, similar to that used in aircraft production and is incredibly strong and coated with hard polymer for scratch resistance. One of the special features on our OD Dobsonians is the ability for existing owners of our OTAs or even competitor's OTAs to be able to just drop their tube straight into one of our mounts.

A further tremendous advantage is the ability to exactly balance the tube to avoid it moving with the weight of added equipment, large eyepieces, cameras, large finders etc. This is a feature only existing or past owners of Dobsonians are all to aware of. Typical Dobsonian designs are renowned for the tube swinging down when equipment, even of the slightest weight, is added. To avoid this, elaborate devices are often used which seldom work properly. More common is to increase the drag on the declination axis thus increasing the drag on those bearings and, as a consequence, creating a severe problem in not allowing smooth adjustment of the telescope's position. With the use of our fully adjustable tube cradles and PTFE bearing surfaces you have the capability of adjusting the balance point exactly to accompany the additional equipment you may have added. If you feel the focus mount is not exactly in the most comfortable position for viewing, just rotate the tube for a better, friendlier position. For users who wish to have total control, we offer an optional variable friction brake.

Downloads

400mm Dobsonian Mount
£595

Mount includes:

Rocker box, all PTFE bearing surfaces, polymer non scratch screw on feet, declination CNC machined bearing rings. To fit an OTA, tube rings and blocks are required to suit your OTA size.

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