nd110 and exposure calculation

<p>hi all<br>

I have just purchased an nd110 filter. When calculating the correct exposure for this filter, I take a correctly exposed shot at the f stop I'll be using... then I laboriously double the exposure 10 times (as it's a 10 stop nd filter) and then shoot with the filter on... is there an easier way to do this?<br>

thanks in advance</p>

<p>Your camera, by default, changes shutter speed (and aperture) in 1/3 stop increments with each click. That's 30 clicks for 10 stops. If you set the custom function to give you 1/2 stop increments per click, then you rotate the dial 20 times.</p>

<p>The only time you'd need to do any math is if your shot needs to be longer than 30 seconds (as your camera will be in Bulb mode). But even then, you could count the clicks down to 30 seconds and calculate the remainder.</p>

<p>Or you could make a little spreadsheet that you have with you for reference.</p>

<p> </p>

<p>2^10 is 1024, so just multiply the exposure time by a factor of 1000 and you'll be close enough!<br>

So 1/200s (5ms) becomes 1000/200 = 5 seconds.</p>

<p>bob...<br>

that's just what I needed.. thanks both of you for your time<br>

cheers</p>