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The Banter Page
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If you're wanting to get something off your chest, make general comments about the server, or post lonely hearts ads, then this is the place for you.
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[Rosie] 1 second exposure, ISO 800. The exif data reports the f-number as 0, which probably means it doesn't know. There's no aperture adjustment or designation on the lens. The lens is 1000mm, but the image is substantially larger on this camera than on my Ricoh KR-10, so the effective focal length may be longer. The original picture is very dim, and the above was derived from the RAW+ file by level correction. The exif reports that auto white balance was on, but I'm not sure if that applies to RAW data or just the JPG, which was too noisy to be useful. Also, the eye doesn't see colours so intensely in the dark, so even a perfectly accurate photograph may look more intense than the reality in the light of day. What would you have seen through binoculars of the same magnification but much larger aperture?
Optical aids
I've looked at a lunar eclipse through my telescope in the past and the moon looks a gloomy translucent orange. The focal length of this home-made contraption is 1276 mm (50.24 in.) and the mirror diameter is 8.3 in. so it's about f/6. With a one-inch eyepiece the magnification is about 50. The moon's diameter was 1776 arcsec which would give an image at the prime focus of 0.43" or 11 mm but it's not adapted for photography so I didn't get it out this time.
If the aperture of the binocs were greatly increased there would be little improvement because then the size of the exit pupil would exceed that of the eye pupil and light would be wasted. You can't increase the surface brightness (per unit area) of any extended object whatever telescope you use visually, but photgraphically that's obviously not the case. The binocs make the moon bigger and easier to study but the surface light variations are the same as with the naked eye.
moonstruck
Innit autumnal?
Autumnatic response.
(pen) Yeah. Trouble is, it's autumn.
[Raak] Dropping in here for the first time in a few weeks, so only just saw your picture. That's stunning.
Anyone about?
Very quiet, innit? Weekend a mere two days away - so what's everyone doing?
Somnolence
(pen) Good question. Both MCiOS and this place seem to have gone to sleep. Where's Gusset Login? I reckon I've won AVMA.
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