After many months frequenting this website, I decided to post.
I have been experimenting with slow shutter as of late and have two questions about ND Filters.
QUESTION 1: I am getting a weird effect with my ND Filter. Why? Examples below.
Here's what is used in these example photos: Canon 5D MKII, 24-70 F2.8L, Hoya Variable ND Filter, Remote Controller.
First (Good) Photo Settings: 50mm, ISO160, F18, 0.5 Sec Shutter
Second (Bad) Photo Settings: 50mm, ISO160, F18, 30.0 Sec Shutter
It's obvious that it's something to do with the shutter speed ...but isn't that the point of an ND Filter? I want to take long exposures ...but every time I do, I get this weird blue smudge.
QUESTION 2: How do you expose properly with an ND Filter? The exposure meter does not get effected when I place an ND filter on ...So how do I compensate exposure accurately when I put the filter on?