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August 6, 2010
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PENTAX
PENTAX K-7
122/1 second
F/8.0
10 mm
100
Aug 2, 2010, 8:47:02 PM
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:iconadamlack:
Sunset looking across Doverhay Down, Exmoor, towards Wales over the Bristol Channel. One of my first shots with my new Sigma 10-20 and 10-stop B+W ND filter. I love Exmoor, the lens, and the filter. =D


© 2010 Adam Lack

All rights reserved. My images may not be reproduced in any form without my written permission.
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:icondranak:
~dranak Aug 7, 2010  Hobbyist Photographer
:love:
I must admit I'm not really familiar with filters (except those on Photoshop :XD:)...
What does a 10-stop B+W ND do??
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:iconadamlack:
~adamlack Aug 7, 2010  Hobbyist Photographer
B+W is the make, and it's an ND (Neutral Density) filter. Basically, it reduces the amount of light going through it by 10 stops. Which is a lot. It means what would normally be a 1/60sec exposure becomes a 15 second one with the filter on, roughly speaking. You can use it for blurring running water/clouds/people/cars/lights etc under lighter conditions than normal.

Does that sort of help? Tell me if I can try and explain any more ;p
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:icondranak:
~dranak Aug 7, 2010  Hobbyist Photographer
:o ooooh... yeah that explains a lot, thanks! I always wondered how you could achieve that but never got the time to check it out! when I simply tried longer exposures, ermmm well, I didn't get that smooth cool effect at all!! hahaha :slow:

Are these filters the only way to achieve this effect?

Also, I'm not sure what you mean by "under lighter conditions than normal"...

Thanks again! :highfive:
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:iconadamlack:
~adamlack Aug 7, 2010  Hobbyist Photographer
The way to do it is to use really long exposures (I've been using 30 seconds to 4 minutes). Without a filter, you can only get that long when it's dark - otherwise there's too much light around (from the sun for example) to let you take such a long exposure without it going all white and over exposed. The way to get around this is to use an ND filter to reduce the amount of light that gets through the lens, and therefore be able to take longer exposures. What you're doing is basically simulating darker conditions, requiring longer shutter speeds.
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:icondranak:
~dranak Aug 7, 2010  Hobbyist Photographer
Makes perfect sense! I knew it had to do with long exposures but when I tried, as you said, the result was just over exposed! and somehow I thought filters were only to give a specific color tint... it's nice to know so thanks for the tip!

hey do you think I could use my uncle's old filters from his old traditional camera? do all brands fit on any camenra?
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:iconadamlack:
~adamlack Aug 8, 2010  Hobbyist Photographer
Yeah, you can get loads of different types of filter, and some of them do indeed give a colour tint.

There's no reason why not - all filters are are glass. Assuming they're screw-on round filters, they should work fine as long as they're the same diameter as the lens. If not, you could always try getting a step-down ring. The brand makes no difference to what it will fit on, apart from specific sets like Cokin/Lee which need special adapters.

Hope they fit! :D
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:icondranak:
~dranak Aug 8, 2010  Hobbyist Photographer
I saw my uncle today! He didn't have a neutral density filter but he had several other with tints and gradients and the ones that make stars with lights and all... but my lens is 52mm and his filters were for 55... :tantrum:


BUT guess what, he actually had a Cokin set, how funny is that!?! It came with several sizes of adapters and one was 52mm! so yay, in the end, I can use the whole set with like 8 filters (including a polarizer)!! :la:
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:iconadamlack:
~adamlack Aug 8, 2010  Hobbyist Photographer
Wow, awesome! I'd love a polarizer ¬_¬ ;p Can't wait to see what you do with them! :w00t:
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:icondanuk86:
*danUK86 Aug 6, 2010
love the sky :D
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:iconadamlack:
~adamlack Aug 6, 2010  Hobbyist Photographer
:w00t: Thanks, that means a lot :D
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