The spider uses very thin steel vanes (only 0.75mm thick) maintaining excellent image quality and minimising unwanted diffraction effects. The views will still be great even if the fan is not used…but if you are looking to coax the upper limits of resolution out of your telescope the fan should be run for a period of 30-60minutes when setting up.Ī fully adjustable four-vane spider supporting the secondary mirror. To help this process our larger telescopes are fitted with 12V battery powered cooling fan helping the mirror come to equilibrium faster. A telescope will produce its very best performance when the optics have cooled to within 1☌ or so of the ambient air temperature. Knurled collimation knobs on the primary mirror cell making precise optical alignment much easier – no more fumbling with tools in the dark.Ī cooling fan mounted to the telescopes main mirror cell to achieve faster cool down of the optics. With thousands of Bintel telescopes in use around Australia we are confident there is no telescope that even comes close when comparing performance and value. If you’re curious how the optical quality of our telescopes compares to other “big” names we say the others are nearly as good. The optics are then coated with 91% reflectivity aluminium, and overcoated with a protective layer of silicon dioxide (quartz) for long life. The thermal stability of BK7 glass is generally better than other glass used for the mirrors of most reflectors in this price range.
#12 DOBSONIAN TELESCOPE FREE#
The mirrors are made of BK7 “water white” optical crown glass that is free of internal stress and striae. Bintel’s telescope mirrors are ground and polished to exacting tolerances and checked by laser interferometry to guarantee outstanding performance. Telescope optics have to be ground and polished to a very accurate shape to ensure the finest images. Precision figured primary and secondary mirrors
#12 DOBSONIAN TELESCOPE PLUS#
You can expect sensational views of celestial objects like the Moon and planets, plus with its considerable light grasp you can delve into more distant treats such as cloudy star forming nebulae, globular star clusters and galaxies far far away.īintel’s Dobsonians feature quality components and accessories that will make your viewing experience both rewarding and enjoyable. The telescope’s optics and long focal length will provide night after night of great observing performance. The BT302 12″ Dobsonian features an 12″ (300mm) diameter parabolic mirror with aluminium coatings providing ~93% reflectivity providing bright detailed images. We are often asked “what telescope is the best for an avid beginner?” Of course the answer depends on how you plan to use your telescope, but if we were to suggest just one telescope for starting your adventures in astronomy – this would be it! Like any Dobsonian, the Bintel BT302-B provides more light grasp for your money than any other telescope type.
0 kommentar(er)
