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 Post subject: Painting with light
PostPosted: Sat Mar 15, 2008 9:39 pm 
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Branching from this thread initiated by Alex168 I thought a little about "painting with light", or to put it differently: painting with your camera.
I was inspired by these photos from Viggo Mortensen of LotR-fame here. Viggo shot on film and just exposed so long that the figures became blurred and ephemeral/immaterial - quite impressive!

When I thought about it, I came to the conclusion, that you need exposure times of around 2-4 seconds. Well, that came as a shock as the next Q arises: How do you get these exposure times under normal sunny conditions? Well, let's do some quick math:
- Put ISO to 100
- Mount a lens that can go to F/22 (no fear of diffraction here)
- Get out on a sunny day and what do you get? Around 1/30 sec :shock:
So you still have to get 7EV down to 4sec exposure time!

How to do this?
I know of no filter shaving off more than 2EV and staying true to normal daylight-spectrum.
Only thing that comes to my mind is using two polarizers and adjust them near 90° to each-other. that should block almost all light. What I don't know is, how this construction influences color-temp?

Anybody out there knowing how to block off 6-7 stops of light while staying true-color?

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 Post subject:
PostPosted: Sun Mar 16, 2008 12:55 am 
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How about an 8x neutral density filter? Or several stacked?


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 Post subject:
PostPosted: Sun Mar 16, 2008 1:03 am 
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Viggo keeps one of his horses close by to my home, and my work.
He is an artist on every level. His eye is unequaled, in my opinion, and I am glad to see that he finds enjoyment in the simple things of life, made elegant, by his touch.

Go Viggy.




patti

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 Post subject:
PostPosted: Sun Mar 16, 2008 9:15 am 
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Gordon, 8x=3 stops? So if you stack 2 of those you get to 6 stops, right?
Hmmm, it seems I can't find 8xND filters at my usual sources though :(

Patti: Yes, Viggo seams to be an all-round talent. MY wife bought two of his books ("Sign Language" + "Coincidence") with photos, paintings and lyrics. She loves his colors and ideas. To me the colors of his paintings are often a little too washed out for my liking.

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