If you already own one of the best telescopes and you want to safely view the partial solar eclipse on the 29 March, you may want to opt for a filter instead of buying a whole new solar telescope just ...
If you own a DSLR camera, you can simply buy more lenses as your needs dictate, instead of having to buy a whole new camera each time. The Sevunscope is intended to bring that same sort of ...
Telescope, Schmidt type, made by Charles A. & Harold A. Lower. The Schmidt comera was invented by Bernard Schmidt in Germany in 1930. It is an ingenious mirror/lens combination which gives a coma-free ...
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