Quote:
Originally Posted by Octane
When you've got your camera hooked up to the telescope, does it still work in Av mode? Because, you can't really dial in an aperture value... or, can you?
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Hmm, to be honest I've never tried it. I will soon as I get a chance. But my thinking is that it'll work. I mean, the light meter works to give you the right shutter speed even though it doesn't know what aperture the scope is at when in Manual mode, why would Av be any different?
PS - sorry to partially hijack things, Geoff. Kinda on topic
EDIT:
I just checked. In Av mode, the camera sets the shutter speed to the correct exposure no matter what the aperture is. It just keeps the exposure meter needle on zero (if you haven't set exposure compensation) and adjusts shutter speed to suit whatever light is coming in at that time. Point at something light, you might get say 1/50s. Point at something darker you might get 4 seconds.
Once you trip the shutter, you're locked in on that speed. I pointed at something dark with 4 seconds exposure, then while the shutter was open moved and pointed at something lighter, but the shutter speed remained at 4 seconds so the shot was severely overexposed.