Panrock wrote:Hi Harry,
How are you?
Fine Steve getting a little hot for work down here .
I closed my Facebook page (which had that same picture) because I was getting p*ssed off the way it would over-share my updates to 'all and sundry' ... and made me look like a show-off.
Yes it has its faults i only use it as some where to put stuff i find for free .
That Baird mirror screw looks like it casts an image on to a screen. Karen always said I should try to do the same with mine.
No its not a Baird one i don't think he ever used one that we know of ? its a Scophony, Rotating Echelon and looks like it uses square glass mirrors ? I know Scophony called there early mirror screws this ...yep a mirror screw to screen was another way to use it, i only recall the TEKADE mirror screw and Peter YANCZER's TEKADE replica .
The full build must still be about i recall seeing if not just on the way back machine site ,i found this page which is it but not the build ,https://www.earlytelevision.org/dupouy/la-radiovision.fr/a-projet_mirror.html
BTW mentioned this once before i think below one says its back screen is a reflector photo looks the same but i thinks black painted had me wondering why !
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Right now, I am being tempted by a 16-inch Dobsonian telescope that's on special offer. Trouble is, in the UK we don't have your Australian clear skies - or your exotic constellations. And also, I have been told I now have cataracts, though can't say I've noticed.
Steve O
Sorry to hear about the cataracts ! least that is fixable if it gets worse !
MY 16 year old son Charlie is very much into this as well i like it also but he kicks my arse on all this taking tracked astro photography photos just knows where every thing is in the sky ,took a photo of that comet thats in the sky now he took this one before you could see it with the naked eye ,He does all this on he's Nikon on a tracker i don't think he has tried hooking hes telescope to the camera due to no tracking onit . My Son says 16 inch Dobsonian is a seriously big Telescope hes impressed . He told me to show hes photos ; 0 )
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.