M240 and ND filter users?

[thrid]

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Not all IR-ND filters behave the same way. Results are very dependent on the combination of filter brand and camera.

 

So, on the 240 a Tiffen IR-ND may give you very different results than one from Schneider. Unfortunately there is no easy way to predict which combination works best, except to actually shoot a series of tests.

 

Here is an example from the world of digital cinema that illustrates this issue:

 

[edesalvo]

wow...

 

ND3 = 1 stop

ND6 = 2 stops

ND9= 3 stops

 

ND3 generally refers to .3 and so on.

This is not correct. You are confusing optical density with stops.

 

ND 0.3 = ND2 =1 stop loss

ND 0.6= ND 4= 2 stop loss

ND 0.9 = ND 8= 3 stop loss

ND 0.12= ND16= 4 stops loss

 

Etc.

[digitalfx]

This is not correct. You are confusing optical density with stops.

 

ND 0.3 = ND2 =1 stop loss

ND 0.6= ND 4= 2 stop loss

ND 0.9 = ND 8= 3 stop loss

ND 0.12= ND16= 4 stops loss

 

Etc.

 

Thanks for waking a 1 yr old post.

I was referring to the common name...in the film industry [right or wrong] a .3 is commonly called an ND3 [or 1 stop] ND6, etc.

ND6= 2 stops

ND9= 3 stops

 

in my world nobody uses ND2, ND4, ND8.

 

what is correct, is what is commonly used.

[thrid]

Thanks for waking a 1 yr old post.

I was referring to the common name...in the film industry [right or wrong] a .3 is commonly called an ND3 [or 1 stop] ND6, etc.

ND6= 2 stops

ND9= 3 stops

 

in my world nobody uses ND2, ND4, ND8.

 

what is correct, is what is commonly used.

 

In cinematography it's always been like that and in general that is how I've always heard people refer to the various densities.