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#1 |
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New Member
Join Date: Dec 2007
Posts: 3
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Guys can explain to mi wad is ISO 1600, 800 etc ??
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#2 |
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Senior Member
Join Date: Feb 2004
Location: Perth
Posts: 3,155
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Image Stabiliser On
![]() Otherwise it's equivalent to the film speed ( http://en.wikipedia.org/wiki/Film_speed ) |
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#3 | |
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Member
Join Date: Oct 2007
Posts: 207
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i dun think its Image Stabiliser On, its International Standard Organisation. Film speed is right though. http://http://www.photoxels.com/tutorial_iso.html
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Canon 400D / Rebel XTi Gripped EFS 17-85mm / 50mm f/1.8 http://jerryyang.deviantart.com |
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#4 |
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New Member
Join Date: Dec 2007
Posts: 3
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ISO too high will cause more noise in the pic?
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#5 |
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Senior Member
Join Date: Jan 2005
Location: Hougang
Posts: 11,823
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Yes it will. But pro series cams usually can handle low noise at very high ISO levels.
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Canon EOS 5D w/BG-E4, 50 f/1.2 L, 580EX II. Sigma 12-24 f/4.5-5.6, 70-300 f/4-5.6 APO. |
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#6 |
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Senior Member
Join Date: Feb 2005
Location: East
Posts: 10,953
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Depends on how packed the sensor is with the pixels... the higher the density, the more likely the noise will be bad. That said, they are getting better and better with each technology inprovement.
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#7 |
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Member
Join Date: Aug 2004
Location: Woodlands
Posts: 1,098
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#8 |
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Member
Join Date: Dec 2007
Location: Woodlands
Posts: 505
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It's the light sensitivity of the sensor.
Way back to film time, it was controlled by the material and chemical on film, which expose while contacting to light. The higher the ISO, the more sensitive to light. Of course, the "noise" will increase accordingly, as the light sensitive chemical have to react with very little light as well. Now the "D“ era, it's a electronic light sensor that replace the film. The same physics have to apply, the higher the sensitivity, the more "noice" you'll feel. Technology can slowly improve this, but cannot change the fact.
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Sony Alpha |
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#9 |
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New Member
Join Date: Dec 2007
Posts: 3
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So in wad conditions i should use higher ISO and Lower ISO?
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#10 |
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Member
Join Date: May 2007
Posts: 144
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#11 |
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Senior Member
Join Date: Jan 2005
Location: Hougang
Posts: 11,823
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For me i constantly change the ISO according to the lighting conditions. For night scenes, always at 100 as the night sky will show noise more obviously at higher ISOs, example is 400.
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Canon EOS 5D w/BG-E4, 50 f/1.2 L, 580EX II. Sigma 12-24 f/4.5-5.6, 70-300 f/4-5.6 APO. |
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#12 |
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Member
Join Date: Dec 2007
Location: Woodlands
Posts: 505
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Try more and you will know.
There're moment that you need high speed in low light, no choice, have to use high ISO.
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Sony Alpha |
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#13 |
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Senior Member
Join Date: Sep 2004
Location: Beyond Space-Time Continuum
Posts: 5,921
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in the common salesperson vocab, ISO = "Image Stabilizer On". especially thos in SLS or Lucky Plaza.
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#14 |
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Member
Join Date: Feb 2005
Posts: 1,795
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#15 |
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Member
Join Date: Jan 2005
Posts: 1,543
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#16 |
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Senior Member
Join Date: Jan 2005
Location: Hougang
Posts: 11,823
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And the more noisy your pics will be too.
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Canon EOS 5D w/BG-E4, 50 f/1.2 L, 580EX II. Sigma 12-24 f/4.5-5.6, 70-300 f/4-5.6 APO. |
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#17 |
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Member
Join Date: Jan 2007
Posts: 291
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i remember the first time i bought my d80 and the dude from john 316 was talking to me about noise reduction intro me to the camera. my mum was like...eh this camera can record sound ah??
anyway imho, try to keep your iso as low as possible...only bump up when necessary. safe to bump up is not beyond a 1000 or at least thats my rule. haha.
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nikon d700 nikkor 50mm f1.4 nikkor 55mm micro ais f2.8 nikkor 35 f2 sb 600 sb800 |
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#18 |
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Senior Member
Join Date: May 2005
Posts: 1,807
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most important to reduce noise is to expose the shot properly... if proper exposure is not possible with the current sensitivity, better to bump up the sensitivity then to under expose (at least for jpgs)...
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#19 |
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Senior Member
Join Date: Feb 2005
Location: East
Posts: 10,953
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Yes... pls note that a under-exposed shot actually induces more noise than a exposed shot of higher ISO.
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