Apart from the obvious difference of aperture and physical size and shape, all the telescopes from the
OD150 up to and including the OD400, are remarkably similar. Differences occur mainly in the
technical specifications between the standard models and the de-luxe models.
The main areas of ‘visible’ differences are:
Finder scope.
Standard are supplied with a 30mm aperture finder, De-Luxe with a 50mm finder
but both work off exactly the same principle.
Focuser.
Standard are fitted with a rack and pinion 2” focuser (150mm models use a
31.7mm focuser) The De-Luxe utilises a 2” precision Crayford focuser.
Both the above two items are covered in more detail later.
Differences which cannot be readily seen until you begin to use the telescope:
Optics.
Standard models are supplied with our normal coatings, De-Luxe models have our
hi-tech Hilux high reflectivity coatings applied to both mirrors. This typically
transmits around 25% more light to your eye than standard telescope optical
coatings. 1/4PV wavefront optics are fitted to the standard models and 1/6 PV to
De-Luxe models. With the De-Luxe models, you should also have a Zygo print out
of data of the telescope on optical test.
You may have requested and had some additional equipment added to your telescope, this is not
covered in this manual.
Model differences
