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TOPIC: Compensating for filters

Compensating for filters 2 years 11 months ago #5356

When using a filter such as a +3 neutral density filter, does the camera meter compensate for the filter, or do I have to drop my exposure by 3 stops?

Thanks,

David Johnson
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Compensating for filters 2 years 11 months ago #5359

  • Bren Byrne
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Hi David

As far as I know yes you would be right.

3 Stop- ND 0.9 Shutter Speed 1/125, New Shutter speed 1/60.
There is a very good App for that if you require ND Filter Calc.

Bren
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Compensating for filters 2 years 11 months ago #5364

  • Conor Casey
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Hi David,

When you put a 3 stop ND filter in front of the lens, the camera meter will automatically know that there is less light getting to its sensor and will therefore adjust the meter reading. If you are in manual mode with an ND filter in front of the lens, all you need to do is set the exposure according to the given meter reading.

The only time you should adjust it yourself/calculate your own exposure when the ND filter is attached is if you are using an 8 or 10 stop ND filter. In this case, you should take a meter reading without the filter and refer to an 8 stop or a 10 stop exposure chart that will give you the correct exposure. For some reason with very strong ND filters, the camera meter doesn't get it right. Otherwise, the meter is usually correct.

Hope that helped. :)
Conor Casey
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