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p.20 #25 · 'Official' Post-PMA Discussion thread | |
DynoMoHum wrote:
I really wish this would get said more often... it sort of annoys me when people start talking about loosing 'reach' or 'telephoto' when they speak about going from one crop sensor to another sensor that's bigger and/or has different pixel density...
I'd much rather see people speak about pixel density... and the pros and cons of higher or lower pixel density.
brainiac wrote:
Contrary to popular misconception, frame size doesn't deliver a telephoto advantage. Pixel pitch does. If the 5D2 had the same pixel pitch as the 400D, then puff goes your 'telephoto advantage'.
It's all about balance, your trading reach for sensor size. The smaller sensor, given the same pixel count, will have more noise, so you trade sensor size for pixel count. If you want the higher pixel count, you trade pixel count for noise. Often you can reduce noise, by using a lower ISO setting, so your trading ISO for noise. There is noise processing software, which lets you keep ISO but then your trading ISO for sharpness.....
Eventually, if the megapixel race continues, we will reach a point, where reach will exceed the point where the tradeoffs are worth it, then the 1.6 crop will start to go away. For example a 1.6 crop sensor of 24MP, that limits you to ISO200 or gives "mushy" images, probably will not fly, especially when a full frame 24MP sensor allows 6400ISO and has razor sharp images.
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