Calculating exposure difference with ND Filter

Discussion in 'Beyond the Basics' started by benjyman345, Mar 7, 2007.

  1. benjyman345

    benjyman345 TPF Noob!

    Joined:
    Sep 26, 2006
    Messages:
    152
    Likes Received:
    0
    hello,
    I was wondering, how do i calculate the difference between exposures when using a Neutral Density (ND) filter?

    I.E. 2x, 4x, 8x

    Thanks
     
  2. Alex_B

    Alex_B No longer a newbie, moving up!

    Joined:
    Aug 30, 2006
    Messages:
    14,491
    Likes Received:
    206
    Location:
    Europe 67.51°N
    Can others edit my Photos:
    Photos NOT OK to edit
    there are different ways of labelling ND filters. I guess the numbers you gave just mean you multiply by 2, 4, 8, ...
     
  3. Torus34

    Torus34 No longer a newbie, moving up!

    Joined:
    Jan 26, 2006
    Messages:
    2,117
    Likes Received:
    37
    Location:
    Tottenville, Staten Island, NYC USA
    Can others edit my Photos:
    Photos OK to edit
  4. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

    Joined:
    Dec 16, 2003
    Messages:
    33,822
    Likes Received:
    1,811
    Location:
    Edmonton
    Can others edit my Photos:
    Photos NOT OK to edit
    If you are using a modern camera (with a built-in meter) then once you put the filter onto the lens, the meter readings will be compensating for the filter.

    You do have to calculate it manually when you are using a hand held meter.
     
  5. Alex_B

    Alex_B No longer a newbie, moving up!

    Joined:
    Aug 30, 2006
    Messages:
    14,491
    Likes Received:
    206
    Location:
    Europe 67.51°N
    Can others edit my Photos:
    Photos NOT OK to edit
    Well, if you use a 64x filter in dim light (to get ultra-long exposure), then the sensitivity of the built-in meter is usually not sufficent to give really accurate values (all you see is black ;) ).
     

Share This Page

Search tags for this page
.09 nd filter
,
calculate exposure for nd lens
,
calculating exposure with nd filters
,
exposure calculator nd filter
,
how much difference between an 8 and a 10 nd filter
,

how to calculate nd filter

,
how to calculate nd filter exposure
,
how to calculate neutral density filter
,
long exposure conversion with nd filters
,

nd filter calculation