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TV-85 HD4: NP-101is
it is no wonder then that the 10" aperture is overtaking the 8" as the serious amateur astronomer's aperture of choice in a Dobsonian telescope
most of the time
When using a focal extender to increase your magnification
Orion Focal Reducer, 0.8x for ED Refractors Turn Left at Orion TV-85 HD4: NP-101isReduces an astrophotography refractor's effective focal length by a factor of 0. 8x, providing a shorter, more optically fast focal ratio Now includes interchangeable male M42 and M48 "wide" thread on camera adapters (T ring for your camera sold separately) Also flattens the field for sharper stars at the edge of the frame Enables a refractor to both acquire a larger field of view and to capture bright, detailed astrophotos in considerably less time
US$ 1075.00
US$ 123.00
US$ 17.43
US$ 14600.00
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