When taking very long exposures, can soemone tell me how long it proportionally takes to save the file? When I have taken some 4 min + exposures it seems to take a good while to write the image to the sd card. How long would it take when doing something like star trails etc...I.e. over 30mins up to a few hours?
Long Exposures D80 Q
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Davec223
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IIRC if you have the long exposure noise reduction switched on the camera will take a reference shot at the same amount of time as your exposure of the shot as a reference. so writing the file takes as long as the exposure was plus a little
That makes sense, and I do have it turned on at the moment. If I switch it off prosumably they will just take a couple of seconds to record as normal? How much will this affect the images? Lots of noise? Could I do it in PP instead of on camera? What does anyone else do?
iGiDK
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In-camera NR off
If I need to use noise reduction after a long exposure I do it via PP
Little Man
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4 minute exposures? Jesus, what are you shooting?
stylgeo
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I find that the minimum exposures for star trails is 20-25 minutes. The best results are from 40 minutes and above. But in that case, you must check that everything is ok before you set it on bulb.
I personaly have NR on, since if I do star trails it will probably be just one shot anyway, so I do take some time to find the best place, which I will probably know from before, take some time to compose correctly, use hyperfocal distances with manual focusing to check if everything is sharp to infinity, decide my exposure times, set the appropriate aperture and push the button on my remote shutter. I then sit in the car, read a book, I once took my laptop with me and watched an episode of House MD. I knew that when the episode finished it was time to close the shutter
. Until I drive home the image would have already be recorded on the CF, noise free.
I personaly have NR on, since if I do star trails it will probably be just one shot anyway, so I do take some time to find the best place, which I will probably know from before, take some time to compose correctly, use hyperfocal distances with manual focusing to check if everything is sharp to infinity, decide my exposure times, set the appropriate aperture and push the button on my remote shutter. I then sit in the car, read a book, I once took my laptop with me and watched an episode of House MD. I knew that when the episode finished it was time to close the shutter
. Until I drive home the image would have already be recorded on the CF, noise free.
Impartial-Witness
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I find that the minimum exposures for star trails is 20-25 minutes. The best results are from 40 minutes and above. But in that case, you must check that everything is ok before you set it on bulb.
I personaly have NR on, since if I do star trails it will probably be just one shot anyway, so I do take some time to find the best place, which I will probably know from before, take some time to compose correctly, use hyperfocal distances with manual focusing to check if everything is sharp to infinity, decide my exposure times, set the appropriate aperture and push the button on my remote shutter. I then sit in the car, read a book, I once took my laptop with me and watched an episode of House MD. I knew that when the episode finished it was time to close the shutter
Good advise, i may have to try that some time