Orion 80ED Refractor Telescope
Orion Short Tube Telescope is a very good first telescope choice. I bought this telescope after I read a very good review in Sky & Telescope magazine, and I wasn't disappointed.
Optical design: refractor
Clear aperture: 80mm (3.5")
Objective lens: Achromatic (rear element ED glass)
Focal length: 600mm (23.62")
Focal ratio (photographic speed): f/7.5
Focuser: Crayford, accepts 1.25" or 2" accessories
Resolving power: 1.45 arc secs
Maximum practical visual power: 160x
Light Grasp: 131x
Limiting Magnitude: 12
Telescope mounting: photo tripod screw 1/4"
Finder scope: not supplied
Diagonal prism: not supplied
Eye-pieces: not supplied
Tube body: seamless aluminum
Telescope dimensions: D=100mm x 390mm
Telescope aprox weight: 2.6kg (5lbs 11oz)
- Portability. It's not heavy.
- Price. It's probably the cheapest in it's class and in spite of this is delivering very good performance.
- Dew cap it is fitted with a dew cap insuring dew protection and also the protection of the front lens.
- The focuser accepts 1.25" or 2" accessories.
- No Manual All you receive with the telescope is a pathetic sheet of paper, giving you hints about the product.
- No Diagonal Prism.
- No Eyepieces.
- No Tripod. You need to buy an equatorial mount, that will cost you probably more than the telescope.
- The tube is fitting a 100mm lens as well, therefore is a little bit bulkier that it should be.
- The dew cap is not sliding back and this is increasing the size of the telescope making it a little less portable.