ND filter shutter speed conversion

Started 6 months ago | Discussions thread
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Merlin5 Senior Member • Posts: 2,049
ND filter shutter speed conversion

Hi guys. I'm going to be buying a 10 stop ND filter and have been learning how to expose for it from a youtube tutorial.

In the tutorial he shows a conversion chart so that if for instance he's correctly exposed at shutter speed 1/1000th and ISO 100 before putting the filter on, it'll be 1 second when the filter is put on. Or if it's  a different aperture and correctly exposed at1/250th, it'll be 4 seconds with the filter on. Why would I need a conversion chart though if presumably all I have to do is keep dialling the shutter speed down until I see the exposure meter correctly exposing, i.e, in the centre?

 Merlin5's gear list:Merlin5's gear list
Sony a6600 Sigma 16mm F1.4 DC DN (E/EF-M mounts) Sigma 56mm F1.4 DC DN Sony E 70-350mm F4.5-6.3 G OSS
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