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Natural Science Industries Smithsonian 175 Telescope Questions & Answers
Need a service manual for smith corona 250 dle h
You will not find a manual for that telescope. Even if you did it will not explain how to use the telescope. It only shows the parts and assembly.
Locate a local Astronomy club and they can help you with the telescope.
This is probably a small refractor style telescope, being sold by toy stores. It has plastic eyepieces and a plastic focuser and is not suitable for Astronomy.
Read this:
http://www.texasastro.org/telescope.php
Cross hairs do not adjust. Tell me what to do please?
All question need FULL 'make model (what it is)'.
You posted to optics, so let's guess is a telescopic rifle sight?
It is impossible to see and movement as the crosshairs move such a tiny amount. Half a millimetre in the sight is 10 feet at the target. The only way to zero in sights is on a fixed bench rest at the range.
If you really think they are faulty, return them to the maker for repair.
3/8/2023 1:07:51 AM •
Optics
•
Answered
on Mar 08, 2023
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