Related Manuals for Orion Optics OD150
Summary of Contents for Orion Optics OD150
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Page 1: Table Of Contents
Orion Optics UK Ltd Owners manual for models: OD150, OD200, OD250, OD300, OD350 and OD400 Contents Introduction Main parts of telescope Model differences Assembly Checking things Collimation Using the telescope Care and Maintenance Accessories and upgrades... -
Page 2: Introduction
Introduction Thank you for buying one of our Dobsonian range of telescopes. The following will give you all the information you need to allow you to assemble, use and, maintain your telescope. If you carry out the procedures correctly the telescope will give you many years of faultless usage. Please take note in particular of the details on care of optics, if these notes are ignored or not carried out properly, damage to the optical coatings could result. - Page 3 TYPICAL DOBSONIAN MODEL Fig 1...
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Page 4: Model Differences
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. -
Page 5: Assembly
Assembly DOBSONIAN BASE SECTIONS UNASSEMBLED Fig 2 To assemble the base choose a hard, flat surface. Do not try to assemble on a carpeted or similar surface as the mount will not fit squarely together. First of all, fix the back panel to the base assembly with one of the assembly screws, use the supplied Allen key. - Page 6 Fig 3 Next, fix one of the side panels to the base and back panel, see Fig 4...
- Page 7 Fig 4 Again, DO NOT TIGHTEN the screws yet. Now attach the other side panel, see Fig 5...
- Page 8 Fig 5 The base is now assembled and you are about to align the 4 main sections together. This requires a hard, flat surface. Lie the mount down on its side opposite the back panel and adjust the panels until it lies flat on the floor.
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Page 9: Checking Things
Checking things Fig 6 Before beginning to use the telescope there are a few things you need to check out first. This will ensure you have a trouble free viewing session ahead of you. The fist thing to check is if the trunnion bearings are lying snug a set square on the PTFE Alt. - Page 10 Technical stuff! If you can have someone to help in this procedure you will find things are resolved much, much quicker. Procedure: The first thing, which must be done, is to examine the telescope in daylight when positioned horizontally (ish) and facing an even light coloured surface. In your house and pointing towards a light painted wall or similar is ideal.
- Page 11 150, 200 and 250mm models use three adjustment screws only and closed cell. It sound complicated but it really is a simple operation once you try it. At this stage you will probably find your mirror is pretty much collimated to begin with, unless, some excessive ‘twiddling’...
- Page 12 Secondary spider arrangement Just to give you an idea what you may see when you look in the focus mount with no eyepiece fitted, there are three sketches below which show what you could see when you point your telescope at a light coloured wall in daylight.
- Page 13 Point your telescope at a bright star and have approximately a 25mm eyepiece in the draw tube. Focus the star, if OK, use a much higher power eyepiece, minimum 10mm. If it focuses to a symmetrical point, enjoy your evenings viewing and read no further. If you are seeing a flare to one side of the focused star image some collimation is needed.
- Page 14 Using your telescope When your telescope is fully collimated you need to set up your finder scope. First thing is, you need to focus it for your own eyes. To do that, when outside and viewing some object at least a kilometre away, loosen the ring towards the top end of the finder by rotating it and the top most section of the finder.
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Page 15: Care And Maintenance
OC-1 Crayford. On our Dobsonian models, where fitted, the draw tube is silver in colour. Care and Maintenance Virtually all parts of your telescope are resistant to normal usage and, to the sometimes aggressive weather we can have. There are though two or three exceptions and these need special care and attention. -
Page 16: Accessories And Upgrades
CD- Catalogue for the optical options. If you have any problems with your Orion Optics’ Dobsonian please contact initially your supplier of the telescope and they will contact us with details. If you chose to buy direct from our Factory Shop, please phone our contact number 01270 500089 or email us at john@orionoptics.co.uk...
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