CaptainPete Member 41 posts Joined Jul 2007 Location: Dublin More info | Aug 06, 2007 10:58 | #1 Does anyone know why ISO 50 and 3200 for that matter has to be selected through ISO expansion in the menu and not directly with the normal ISO selection. I can understand that 3200 could be very noisey and therefore kept out of harms way in case of inadvertant selection.
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B3SEO Senior Member  783 posts Joined Jul 2007 Location: Washington State More info | Aug 06, 2007 11:01 | #2 The 5D is the same way, enabled through the custom functions. I shoot ISO 50 on a tripod and the results are really good. Of course, you get slower shutter speeds. No penalty as far as I know of. Landscapes would work well on 50. Step back please... I'm armed with a camera...
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RonaldS.Jr. Prodigal "Brick" Layer  More info | Aug 06, 2007 11:05 | #3 Lower dynamic range with ISO 50. As I understand it, ISO 100-1600 are achieved by raising and lowering the sensor's sensitivity. However, ISO 50 and 3200 are the result of a "software trick" of sorts. Mac users swear by their computers. PC users swear at theirs.
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johnms88 Goldmember  1,053 posts Joined Aug 2006 Location: Niagara Falls, NY More info | Aug 06, 2007 19:15 | #4 Ronald S. Jr. wrote in post #3677585  Lower dynamic range with ISO 50. As I understand it, ISO 100-1600 are achieved by raising and lowering the sensor's sensitivity. However, ISO 50 and 3200 are the result of a "software trick" of sorts. Yeah, it would be the same as jut shooting 100 and bumping the exposure down in PP. 1Dmk2n:16-35L:24-70L:Sigma 70-200: 85 1.8 : 50 1.8: www.stuiephoto.com
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RonaldS.Jr. Prodigal "Brick" Layer More info | Aug 06, 2007 23:17 | #5 Yup...just like (assuming you don't have a MkIII) underexposing ISO 3200 and bumping it up in PS to get 6400. Mac users swear by their computers. PC users swear at theirs.
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Cathpah Goldmember  4,259 posts Likes: 5 Joined Jan 2006 Location: Maine. More info | Aug 07, 2007 03:56 | #6 Ronald S. Jr. wrote in post #3677585 Lower dynamic range with ISO 50. As I understand it, ISO 100-1600 are achieved by raising and lowering the sensor's sensitivity. However, ISO 50 and 3200 are the result of a "software trick" of sorts. lower dynamic range is a HUGE loss. I certainly go up in the iso expansion, but never down (unless i'm taking a waterfall shot and don't have an ND...but that's absolute worse case scenario stuff) Architecture
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JAcosta Goldmember  1,522 posts Joined Apr 2007 Location: Korea More info | Aug 07, 2007 17:49 | #7 Cathpah wrote in post #3682563 lower dynamic range is a HUGE loss. I certainly go up in the iso expansion, but never down (unless i'm taking a waterfall shot and don't have an ND...but that's absolute worse case scenario stuff) Isit really that bad? Ive done bulb exposers with ISO 50 and they come ou looking pretty good. I guess Ill do a comparison next time with ISO 50 and 100. Like any of the photos Ive posted?flickr flickr flickr
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airfrogusmc I'm a chimper. There I said it... More info | Aug 07, 2007 17:56 | #8 JAcosta wrote in post #3686576 Isit really that bad? Ive done bulb exposers with ISO 50 and they come ou looking pretty good. I guess Ill do a comparison next time with ISO 50 and 100. Heres a couple I shot at 50.
Almost forgot taken with a 5D
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Mortgage101 Senior Member  477 posts Joined Mar 2007 Location: Orange County, CA More info | Aug 07, 2007 20:59 | #9 umm Damn. Nice pictures imho. Capture the moment that took your breath away. Savor each one and look for more to come!
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