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Cannon 40d Question
Howdy all,
Just a question regarding exposure time with the 40d. If fi do some set up & framing shots at 30 seconds, I always get an image on my screen of at least some stars etc, When I try to do a 2 min exposure, why do I end up with a black frame & no image, I will try longer exposures, just would've thought any exposure lenght wouldve done ok if 30 secs shows an image.
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