How do you determine exposure length when in bulb mode?

5 years 3 weeks ago #637829 by Nathan D
Long overdue question.   Most of the time I shoot Aperture priority or full on Manual.  And as you know, our cameras let us know what adjustments we need to come to correct exposure when you are under 30 seconds.  But when you go over, we are in bulb mode.  Now what I have been doing in the past while in bulb mode is just trial on error adjustments till the photo looks OK.  

Is there a more exact and efficient manner to coming to a correct exposure than taking 5 shots (example usually can get correct exposure between 2-5 shots) changing the exposure till it looks good? 

Thanks guys and gals.  


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5 years 3 weeks ago #637830 by Shadowfixer1
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5 years 2 weeks ago #638103 by Nikon Shooter
Set up your camera to the desired values, report these
to the light metre and measure the time.

Light is free… capturing it is not!
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5 years 2 weeks ago #638211 by Soccer Mom
Are you iPhone or Android?  There are a number of apps for "Long exposure calculator"

Canon 7D, 18-55mm, 55-250mm, 70-200mm L f/2.8, 100mm and 17-55mm f/2.8
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