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Message: <blockquote data-quote="tdodd" data-source="post: 1418552" data-attributes="member: 55450">Well said, Roy. I'd like to add, as far as xxxD -> xxD is concerned.... - Bigger, brighter viewfinder, with more coverage of the scene;- Better ergonomics - rear control wheel;- Better ergonomics - better fit in the hand (without adding a costly grip);- Not only better AF *performance* but also more AF points to choose;- Wireless file transfer and wireless "tethered" shooting available, at a cost; Even as you go further up the food chain, to the 1 series bodies, the change is not so much about IQ as it is about features that will enable you to get the shot you want, where a lesser camera may not have got the shot at all. Examples from the 1 series include... - Even bigger, brighter viewfinder, with 100% coverage of the scene;- More options on exposure bracketing;- Viewfinder shows and meter +/- 3 stops instead of 2;- Multiple spot metering available, with a tighter spot;- Can define upper and lower limits for aperture, shutter speed and ISO when shooting in autoexposure modes;- Even better AF - focus point expansion is a noteable improvement over the xxD series and there are other fine tuning controls available;- AF at f/8;- Won't conk out in the rain;- Massive battery life;- Proper indication of battery charge level;- Faster flash sync (1D3);- As the sensor is larger, better IQ, lower noise, more creative shallow DOF options;  I think it's fair to say that IQ does go up when you start choosing larger sensor formats, but within each format, be it 1.6X crop, 1.3X crop or full frame the improvements in IQ, at least at lower ISOs are fairly marginal and probably not the main reason to upgrade.</blockquote>

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