Pedro Posted August 30, 2007 Share #1 Posted August 30, 2007 Advertisement (gone after registration) If using a tripod to photograph a steady subject (e.g. architecture), with low light, is it better to use higher ISO or longer exposures? Link to post Share on other sites More sharing options...
Advertisement Posted August 30, 2007 Posted August 30, 2007 Hi Pedro, Take a look here Low light: higher ISO vs longer exposure. I'm sure you'll find what you were looking for!
simon_hughes Posted August 30, 2007 Share #2 Posted August 30, 2007 I would always go with the lowest ISO and a longer shutter speed. Link to post Share on other sites More sharing options...
Shootist Posted August 30, 2007 Share #3 Posted August 30, 2007 Only use high ISO when you need to keep the shutter speed high. If you're using a tripod with a static subject always go for lower ISO and longer shutter speeds. That is IF you're not looking for some type of noise/grain effect in the shot. Link to post Share on other sites More sharing options...
hdrmd Posted August 30, 2007 Share #4 Posted August 30, 2007 Lowest possible ISO always unless you want a special effect. DR Link to post Share on other sites More sharing options...
farnz Posted August 30, 2007 Share #5 Posted August 30, 2007 Pedro, If you're shooting with an M8 you can also deliberately underexpose by 2 or 3 stops, which will increase your shutter speed, because exceptional amounts of shadow detail can be easily retrieved from M8 DNG files during post-processing. Pete. Link to post Share on other sites More sharing options...
Jamie Roberts Posted August 31, 2007 Share #6 Posted August 31, 2007 Pedro, If you're shooting with an M8 you can also deliberately underexpose by 2 or 3 stops, which will increase your shutter speed, because exceptional amounts of shadow detail can be easily retrieved from M8 DNG files during post-processing. Pete. Yes, but only at low ISOs. At high ISOs (1250 and above) you need to nail the exposure and forget a stop or more in the shadows. If I was doing architecture work, I'd shoot 320 or 640 and go for long exposures. Link to post Share on other sites More sharing options...
Pedro Posted August 31, 2007 Author Share #7 Posted August 31, 2007 Advertisement (gone after registration) As the M8 displays a message regarding noise reduction after long exposures it got me thinking... Thanks for your feedback. Link to post Share on other sites More sharing options...
Hookeye Posted August 31, 2007 Share #8 Posted August 31, 2007 As the M8 displays a message regarding noise reduction after long exposures it got me thinking... Nice photos Pedro. Good luck continuing with your project. I believe the noise reduction process the M8 goes through after a long exposure is something akin to the "digital subtraction" process used in medical imaging. I.e. the camera takes another blank "photo" capturing the sensor and system noise at the time of you making the long time exposure. Then the signal from the blank is subtracted from the actual photo - in that way you get rid of all constant sensor and system noise, which otherwise could become noticeable in a long term exposure. I am not absolutely sure, but I am sure there are "techies" here at the forum who can explain it more precisely. Link to post Share on other sites More sharing options...
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