Long Exposure Lengths.

milster

milster

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Gary
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Hey guys, what's the best way to work out exposure lengths for taking long exposures using a nd filter for instance? Anything over 30 seconds and I'm just guessing at the moment.

Thanks.
 
milster said:
Hey guys, what's the best way to work out exposure lengths for taking long exposures using a nd filter for instance? Anything over 30 seconds and I'm just guessing at the moment.

Thanks.
Click to expand...

Do you have a smartphone? There is an iPhone app called 'Longtime'. Works really well. :thumbs:
 
If you type "Long Exposure Chart" into Google you will get them in there droves.

If like Gareth said you have a smart phone then there are plenty apps for Android and Apple
 
milster said:
Ahh, nice one guys, I never even thought about phone apps. I'll have a look :thumbs:
Click to expand...

It hadn't occurred to me either!

I had a browse and went with 'Exposure Calculator' on Android.
It neatly and simply solves the three challenges that often leave me scratching my head.
1) Night time - test shot typically at ISO 12800, f3.5, 4s which allows me to check exposure histogram and composition of the image, but is too noisy to keep; so need to convert into ISO 100 and a better DoF.
2) Star Trails - same test shot as night time, but need to convert into 30s with a sensible balance of ISO and Aperture.
3) Lee Big Stopper - Test shot at 'normal' settings, but need to add 10 stops!

Tried all three of those scenarios and I reckon this App is going to save me from a migraine or two!
 
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