DarrylBaptista Senior Member 323 posts Joined Aug 2005 More info | Oct 26, 2007 02:40 | #1 Should one expand the ISO on a Canon 5D camera using the custom setting C.Fn-08 thereby enabling the ISO 50 and ISO 3200 setting.
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mkfotos Member  151 posts Joined Sep 2006 More info | Oct 26, 2007 02:43 | #2 Yes, there's no harm in it although it's been reported that ISO 50 loses some dynamic range, and ISO 3200 is of course more noisy. 1D Mark III * 5D Mark II * SD700 * LX-3 * 16-35 L II * 24-70 L *24-105 IS L * 50 f/1.4 * 70-200 f/2.8 IS L + f/4 IS L * 85 * 85 L II * 200 f/2 IS L * a ton of studio gear
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dosken Member  184 posts Joined Oct 2006 Location: Göteborg, Sweden More info | I think the reason why it's not expanded by default is that they are no "real" ISO values, ISO Hi is just ISO 1600 underexposed a stop and taken back in software, opposite for ISO Low. So you can probably achieve the same effect (possibly even better) by over/underexposing yourself and fix in e.g. PS. 7D w/grip, 17-55/2.8, 100/2.8 macro, 200/2.8L II, 580 EX II
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Oct 26, 2007 03:05 | #4 Thanks guys, suppose one is shooting in bright outdoor light, will ISO 50 setting bring about a more vibrant colour and less noise if enlarged to a poster or billboard size ?
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mkfotos Member 151 posts Joined Sep 2006 More info | Oct 26, 2007 03:10 | #5 Darryl Baptista wrote in post #4194083  Thanks guys, suppose one is shooting in bright outdoor light, will ISO 50 setting bring about a more vibrant colour and less noise if enlarged to a poster or billboard size ? Darryl Canon 5D 24-105 IS f/4mm, 50 f1.8 mm vs. ISO 100? No, but quite possibly worse IQ instead. 1D Mark III * 5D Mark II * SD700 * LX-3 * 16-35 L II * 24-70 L *24-105 IS L * 50 f/1.4 * 70-200 f/2.8 IS L + f/4 IS L * 85 * 85 L II * 200 f/2 IS L * a ton of studio gear
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dosken Member 184 posts Joined Oct 2006 Location: Göteborg, Sweden More info | Yes a reason to use ISO "50" instead of 100 would rather be if you want a long shutterspeed and you don't want/can't stop down more. 7D w/grip, 17-55/2.8, 100/2.8 macro, 200/2.8L II, 580 EX II
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Oct 26, 2007 06:47 | #7 Hi guys I think I will stick to the default settings for now. Thanks
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cdifoto Don't get pissy with me  34,092 posts Likes: 48 Joined Dec 2005 More info | Oct 26, 2007 06:50 | #8 dosken wrote in post #4194066 I think the reason why it's not expanded by default is that they are no "real" ISO values, ISO Hi is just ISO 1600 underexposed a stop and taken back in software, opposite for ISO Low. None of them are real. It's all an electronics trick. Did you lose Digital Photo Professional (DPP)? Get it here
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