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Dobsonian OD300 S Specification:

1/4PV Optics with Standard Coatings
2" Focuser
30mm Finder
12.5mm Plossl Eyepiece included*
* focal length of eyepiece supplied subject to change due to availability.

 Model dimensions

Total telescope weight 29Kg
Tube weight only 16Kg
Tube diameter 326mm
Tube length 1115mm
Focal Length 1200mm
Focal ratio f4
(All weights approx)

300mm f4 Dobsonian
complete with Mount & Tube Rings

Ideal instrument for all Deep Sky uses. Fantastic views of galaxies and nebulae.

The OD300S is the ideal choice of our models for observers wishing to keep within a 300mm aperture and produce the best deep sky images available anywhere, at any cost, in a Dobsonian telescope of this size . The tube easily fits across the back seat in any family car. 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 you, just rotate the tube for a better, more friendly position.

For users who wish to have total control, we offer an optional variable friction brake.

Downloads

300mm Dobsonian Mount
£308

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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