I've made some cool long exposure night shots, and I'd like to be able to make some long exposure (up to 30 seconds) daylight pics. Can anyone tell me how dark a filter I'd need to be able to shoot 100 ISO, f/16 or so and 30 seconds in bright noon light? I figure this will give me maximum utility b/c I can always bump the ISO or open the aperture if I want a shorter shutter time. I'd also appreciate any brand or other filter suggestions.
The other day I tried to get something at 1/4 of a second at noon on an overcast day. I couldn't get past 1/30 of a second with an ND 3 and a polarizer.
For 30 seconds you'll probably need to stack a few filters, for example several ND 8s. As suggested, using an IR filter would also allow for a slow shutter speed. The filter in front of the sensor blocks most of the IR from getting through but some still does.
The other day I tried to get something at 1/4 of a second at noon on an overcast day. I couldn't get past 1/30 of a second with an ND 3 and a polarizer.
For 30 seconds you'll probably need to stack a few filters, for example several ND 8s. As suggested, using an IR filter would also allow for a slow shutter speed. The filter in front of the sensor blocks most of the IR from getting through but some still does.
ND3-3 stops. Noon and high sun times are perfect for IR. I have heard that IR does not work very well on 10D and 300D (but I don't own one). I have used IR, ND8, and polarizer (lots of vignetting then) all at once for some fun results. The IR on my camera always ends up with over 1/30 on f2.8, but can get over 8 secs with f8.0. Much longer than ND8 alone. It depends on how you want the pick to look at the end.
Well, if you use the sunny & f16 rule, 100 ISO gives you 1/100s @f16 or 1/50s @ f22. A 3 stop filter would give you 1/6s @ f22. Add another 3 stop filter and you get 1.3s @f22, another one gets you to 10s @ f22.
And we all thought the ol' algebra teacher was lying when she said that we needed to pay attention, because we would need to know that stuff in real life! :o)
