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General Photography
Low Light & Night
Natural Night Filter for Light Pollution
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<blockquote data-quote="BF Hammer" data-source="post: 789138" data-attributes="member: 48483"><p>I have a 150mm square light pollution filter. What it does really is filter out a narrow band of light that equates to those magenta-pinkish street lights that were even more common before LED street lights. Those are sodium-based lights that are nearly monochromatic. That band is still prevalent among the light pollution, but it is becoming more of a broadband light issue as the change to LED happens more.</p><p></p><p>Where the filter works best is for wide-angle nighttime landscape work. If you are trying to use telephoto lenses to shoot objects like Andromeda galaxy or some nebulae, then there are different filters that really are tuned to pass the light those types of objects emit and block most of the rest. You really are blocking light from reaching your camera sensor for the most part, but the quality light makes it so you can take a long series of photos for stacking. Those filters are specialized and expensive. Canon shooters get the advantage there as APS-C sensor bodies for Canon can accept a filter in the body that clips in behind the lens. F-mount does not like that kind of clip-in filter.</p><p></p><p>I found that a big filter in front of my lens as the temperature drops really wants to fog-up on me. It does help make the sky look darker with Milky Way landscapes. I have seen some people's work in night cityscapes where the sky come out more natural, but not really bringing out many more stars to see.</p><p></p><p>Here is a night where I used the light pollution filter. This is aimed more or less in the direction of civilization, but it is the darkest sky location that I can drive to in 25 minutes. First shot is a single outtake of a series of photos where the trees are painted by headlights of a car. Second photo is an exposure stack of about 30 shots.</p><p></p><p>[ATTACH]378783[/ATTACH]</p><p></p><p>[ATTACH]378784[/ATTACH]</p><p></p><p>Sequitor, which is what I stacked the exposures with has it's own light pollution filtering in the options so that is why the horizon gets so glowy in the stacked image. But this run was cut short due to fogging of the filter half-way through the 60 images the intervalometer was programmed for.</p></blockquote><p></p>
[QUOTE="BF Hammer, post: 789138, member: 48483"] I have a 150mm square light pollution filter. What it does really is filter out a narrow band of light that equates to those magenta-pinkish street lights that were even more common before LED street lights. Those are sodium-based lights that are nearly monochromatic. That band is still prevalent among the light pollution, but it is becoming more of a broadband light issue as the change to LED happens more. Where the filter works best is for wide-angle nighttime landscape work. If you are trying to use telephoto lenses to shoot objects like Andromeda galaxy or some nebulae, then there are different filters that really are tuned to pass the light those types of objects emit and block most of the rest. You really are blocking light from reaching your camera sensor for the most part, but the quality light makes it so you can take a long series of photos for stacking. Those filters are specialized and expensive. Canon shooters get the advantage there as APS-C sensor bodies for Canon can accept a filter in the body that clips in behind the lens. F-mount does not like that kind of clip-in filter. I found that a big filter in front of my lens as the temperature drops really wants to fog-up on me. It does help make the sky look darker with Milky Way landscapes. I have seen some people's work in night cityscapes where the sky come out more natural, but not really bringing out many more stars to see. Here is a night where I used the light pollution filter. This is aimed more or less in the direction of civilization, but it is the darkest sky location that I can drive to in 25 minutes. First shot is a single outtake of a series of photos where the trees are painted by headlights of a car. Second photo is an exposure stack of about 30 shots. [ATTACH=CONFIG]378783._xfImport[/ATTACH] [ATTACH=CONFIG]378784._xfImport[/ATTACH] Sequitor, which is what I stacked the exposures with has it's own light pollution filtering in the options so that is why the horizon gets so glowy in the stacked image. But this run was cut short due to fogging of the filter half-way through the 60 images the intervalometer was programmed for. [/QUOTE]
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Natural Night Filter for Light Pollution
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