Calculating exposure with 10stop ND Filter

[coreyh]

Just got the B+W ND #110 1000x nd Filter. For those who have experience with this, what is the best way to calculate the proper exposure for any given lighting condition.

For example,

Without filter:

F11 @ 1/60th

With filter:

F11 @ ?

How do I calculate the time required for the extra 10 Stops to provide the proper exposure? Is this possible? Or do you just have to go by trial and error?

Thanks in advance

--
Canon 10D
Canon EF 50mm MKII
Sigma 10-20mm EX DC
Canon 70-300mm IS
http://coreyhardcastle.smugmug.com

 

[jimcreative]

Just open up ten stops... or double the starting shutter duration 10 times.

1/60 - 1/30 - 1/15 - 1/8 - 1/4 - 1/2 - 1 - 2 - 4 - 8 - 16 seconds would be the answer.

Or, take the starting shutter speed and where the numerator is (top number), multiply it by 1000. 1/60 x 1000 = 1000/60 = 16.66667 - close enough for government work.

--

'Truth is stranger than fiction, for we have fashioned fiction to suite ourselves.' G.K. Chesterton

http://www.jimroofcreative.net
http://www.jimroofcreative.com
http://www.healthdesignphotography.com

 

[Ken Head]

I have not used a ND but this is a starting point.
2^10 (2 to the power of 10 or 1024)
So if your exposure was 1/60 it should be around 1/60 X 1024 = 17 seconds
--
Ken Head

 

[coreyh]

Thanks for the tips. Now, to put it to practice.

--
Canon 10D
Canon EF 50mm MKII
Sigma 10-20mm EX DC
Canon 70-300mm IS
http://coreyhardcastle.smugmug.com

 

[Lee Jay]

Just wondering.

--
Lee Jay
(see profile for equipment)

 

[coreyh]

Long exposures. Blurring water/clouds.

--
Canon 10D
Canon EF 50mm MKII
Sigma 10-20mm EX DC
Canon 70-300mm IS
http://coreyhardcastle.smugmug.com

 

[Lee Jay]

Long exposures. Blurring water/clouds.

Great...just wanted to make sure you weren't going to use it as a solar filter.

--
Lee Jay
(see profile for equipment)

 

[lassic]

Double or quadruple that time.

(kidding)

 

[Jim Campbell]

Double or quadruple that time.

(kidding)

 

[Lee Jay]

Double or quadruple that time.

(kidding)

--
Lee Jay
(see profile for equipment)

 

[lassic]

The good old days...

A friend of mine was once trying to shoot macro with a 4x5. He had to calculate the loss from all the extra bellows extensions as well as reciprocity failure. He kept throwing calculations at me but I didn't care- I didn't go to school for this stuff like he did. I wanted to just meter the glass, shoot a polaroid and maybe bracket.

The old 'I wonder how this is gonna turn out' days, waiting for the lab are long gone.