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Filters
Jul 13, 2009 20:02:59 GMT -5
Post by comicIDIOT on Jul 13, 2009 20:02:59 GMT -5
What benefit does the Red and Orange filters give you in a digital world? I used to rely heavily on those same filters, along with a cooling filter or two when shooting slide film, but just haven't found a single use for them in digital. For pure B&W photography. I'll take an image in colour using these filters but I intend to convert them to B&W as soon as I am able. When I purposely shoot for B&W (whether with colour filters or not) I set my camera to shoot in B&W. But since RAW isn't capable of capturing solid B&W, when I get back to my computer the image shows up as colour where as it was B&W on my camera's LCD. Red is suppose to darken the sky, but I haven't seen any difference. I figured orange was just a lighter red so I bought an orange as well. Often times I'll couple my ND and Red filter to get longer exposures, I'm being cheap until I can by a few more ND's to stack up.
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Filters
Jul 13, 2009 20:37:29 GMT -5
Post by ScottWood on Jul 13, 2009 20:37:29 GMT -5
I have never heard of that approach to B&W before. I assume that you are not shooting with an auto white balance setting or it would just cancel any color shift benefit from those filters out?
I used Red filters when I was shooting B&W film, and there was a dramatic increase in contrast with that, but I honestly didn't believe that it would work the same with digital.
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Filters
Jul 13, 2009 21:07:02 GMT -5
Post by comicIDIOT on Jul 13, 2009 21:07:02 GMT -5
Actually, every time I purposely used the red filter for B&W I forget to set the WB, I'll do that either tomorrow or Wednesday - when my class takes a field trip.
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Filters
Jul 14, 2009 0:08:38 GMT -5
Post by Saknika on Jul 14, 2009 0:08:38 GMT -5
Yeah, I have a red and green filter as well, but they're for my film camera, not digital. I'll just boost the contrast in production since I, like Scott, find them useless for digital. Especially since a lot of cameras have those filters built in as an option for b+w.
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Filters
Jul 14, 2009 10:03:09 GMT -5
Post by comicIDIOT on Jul 14, 2009 10:03:09 GMT -5
As does mine. But the camear applies the filter specific maths formulas which results in the potential revealing of noise. When I use a filter over the lens the colour filter, naturally, gets applied to the image the same way the scene does and thus less noise in the resultant image.
Now, if the camera has BUILT-IN filters that it places in front of the censor, then that's a different, and unlikely DSLR, story.
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Filters
Jul 14, 2009 11:20:07 GMT -5
Post by ScottWood on Jul 14, 2009 11:20:07 GMT -5
As does mine. But the camear applies the filter specific maths formulas which results in the potential revealing of noise. When I use a filter over the lens the colour filter, naturally, gets applied to the image the same way the scene does and thus less noise in the resultant image. Now, if the camera has BUILT-IN filters that it places in front of the censor, then that's a different, and unlikely DSLR, story. That's only the case if you do the B&W conversion in camera. If you shoot RAW, you are doing all your B&W conversion out of camera and noise is not an issue, unless you are shooting in an environment where you would have noise regardless of a filter being used.
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Filters
Jul 14, 2009 15:31:14 GMT -5
Post by comicIDIOT on Jul 14, 2009 15:31:14 GMT -5
As does mine. But the camear applies the filter specific maths formulas which results in the potential revealing of noise. When I use a filter over the lens the colour filter, naturally, gets applied to the image the same way the scene does and thus less noise in the resultant image. Now, if the camera has BUILT-IN filters that it places in front of the censor, then that's a different, and unlikely DSLR, story. That's only the case if you do the B&W conversion in camera. If you shoot RAW, you are doing all your B&W conversion out of camera and noise is not an issue, unless you are shooting in an environment where you would have noise regardless of a filter being used. I'm not sure where you are going with this, but you do not disprove my point. Converting to B&W is as simple as stripping the pixels of any hue information; There's no maths involved and thus no noise is multiplied. So applying, say, a Red Filter to a colour photograph as it's being taken will give the image an all around red tint. When I convert to B&W I just strip the hue information and be done. If I take that same photograph in normal colour and overlay a red filter in photoshop the computer uses maths to create the effect, thus having the potential to multiply noise within the image. Which is why I have [recently] tried hard to capture an image with all the edits outside of the camera and use Lightroom & Photoshop to enhance the photograph - which is mostly impossible when not in a studio, sadly.
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Filters
Jul 14, 2009 15:44:27 GMT -5
Post by ScottWood on Jul 14, 2009 15:44:27 GMT -5
I guess we are just going to have to disagree on the use of a red filter in digital. No harm there.
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Filters
Jul 14, 2009 18:30:10 GMT -5
Post by comicIDIOT on Jul 14, 2009 18:30:10 GMT -5
I guess we are just going to have to disagree on the use of a red filter in digital. No harm there. Agreed ;D And colour filters in general, perhaps.
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