Bruce H wrote:
Anyone here doing long exposure using black glass? This evening I went down to the sea using a .9 and a 1.8 ND filters (first try). This reduced my light about 9 stops but I never could get my exposure over 4 seconds. Wasn't all that bright. I am reading on the internet about 10 minute exposures using a 3.0 filter (10 stops) mid day, how is this possible? My ND value I wasn't that far off, or so I thought. What am I missing? Hoya makes a 2.7 (9 stops) filter which I thought I'd buy if I can't make this combination work.
I set the camera manually using the light meter in camera, centered not under exposed or over exposed. My photos turned out under exposed. I'd guess the white surf might have had something to do with this although it was really grey and not white like snow. I might have to add some shutter time to fix that, not sure about how much? I wasn't happy with what I shot. Does anyone have some insight? If you have some examples please post them.
camera is a 5D with 27-70 f2.8 lens. these RAW photos were taken at ISO 100, F16, 3.2 seconds at 24mm, .9 and 1.8 ND filter on together, 9 stops, manual exposure, cable release. I'd like a longer exposure creating softer water.
Anyone here doing long exposure using black glass?... (
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