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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

Binastro's latest activity

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    Binastro replied to the thread Opinion on CN.
    There is a big difference in buying from an established respected brand name rather than new names that keep popping up on the internet...
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    Binastro replied to the thread Opinion on CN.
    The Smyth field flattener dates from about the 1870s. Hardly a Swarovski invention. Swarovski did have two layer coatings in about...
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    Binastro replied to the thread Celestron Spotting Scope advice please?.
    I don't think other makes are any better. In my opinion it is essential to test the scope you want to buy. Although I don't buy...
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    Binastro replied to the thread Nikon SE.
    I have seen hundreds of glass lenses, glass binoculars and glass scopes ruined or destroyed by fungus. Actually, the new telescopes by...
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    Binastro replied to the thread Celestron Spotting Scope advice please?.
    Hi and welcome. There is probably a lot of sample variation with Celestron. I have used a C8 poor, C5 poor both f/6 and f/10. C90...
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    Binastro replied to the thread Information on these binoculars if possible please..
    I also thought it might be early 1960s or even 1950s, but gave 1970 before I tried looking for JB numbers. 7x-12x35 is also unusual as...
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    Binastro replied to the thread Information on these binoculars if possible please..
    Very good condition, wide eyepieces. Magnesium body, maybe high quality product. Perhaps c.1970. K optical company? There may be...
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    Binastro replied to the thread Vintage binos???.
    Here, charity shops have numerous old binoculars from £2 to£20. I take a torch and ball bearings to inspect the inside and do a quick...
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    Binastro replied to the thread CZJ T3M.
    Camera lenses have to cover much wider fields than binoculars, at least with standard and wide angle lenses. The TTH patent 3 layer...
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    Binastro replied to the thread New but probably wrong insight about lowlight.
    I think what is being discussed as brightness is in fact surface brightness. The pupil size does oscillate slightly and is not constant...
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    Binastro replied to the thread Opinion on Celestron C5.
    Thank you Ruff-leg. That is a good and fair review. Incidentally, I easily split both components of epsilan Lyrae, around 2.4...
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    Binastro replied to the thread Opinion on Celestron C5.
    I have used the C5 years ago for mainly astro use. But they vary in quality, although they may now be generally good. I have used the...
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    Binastro replied to the thread How do you pronounce Leica.
    Ten love forty two. I wonder why the Rolls Royce Silver Mist didn't sell well in certain countries? Regards, B.
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    Binastro replied to the thread Recommendation for a binocular.
    Soviet 10x50 or 7x50 good secondhand. Pentax, Olympus 10x50. Regards, B.
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    Binastro replied to the thread New but probably wrong insight about lowlight.
    Not really. Much fainter stars are visible in a 20x50 compared to a 10x50 because the sky background is darker. In fact, stars twice as...
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