好價錢！不過D90有些老了。

D5100 是和 D7000 一樣的 sensor.

Advantages of the Nikon D5100
		Higher resolution movies	1080p @ 30fps	vs	720p @ 24fps		Shoots higher resolution Full HD (1080p) video at a higher frame rate
		Lower noise at high ISO	1,183 ISO	vs	977 ISO		The D5100 has a slight edge (0.3 f-stops) in low noise, high ISO performance
		Better image quality	80.0	vs	73.0		Around 10% better image quality
		Has an external mic jack	Yes	vs	No		Record high quality audio with an external microphone
		Has in-camera HDR	Yes	vs	No		Combines multiple exposures to capture high dynamic range
		Has a flip-out screen	Yes	vs	No		Flip-out screens can be helpful when composing tricky shots or taking movies
		Video autofocus	Contrast detection	vs	None		Automatically focuses shooting video
		Better color depth	23.5 bits	vs	22.7 bits		Distinguishes 0.8 more bits of color
		Higher true resolution	16.1 MP	vs	12.2 MP		Capture more than 30% more detail in your photos
		Better boost ISO	25,600 ISO	vs	6,400 ISO		The D5100's boost ISO is 2 f-stops better
		More dynamic range	13 EV	vs	12.5 EV		0.5 f-stops more dynamic range
		Smaller	127x96x78 mm	vs	132x103x77 mm		Around 10% smaller
		Better maximum light sensitivity	6,400 ISO	vs	3,200 ISO		The D5100's maximum light sensitivity is 1 f-stop better
		Significantly lighter	560 g	vs	703 g		More than 20% lighter
		Cheaper	$496.95	vs	$589.95		The best price we've seen is $93 cheaper (around 20% less)
Learn more about the Nikon D5100							Buy now $497 compare 43 other prices
Advantages of the Nikon D90
		Significantly larger viewfinder	0.63x	vs	0.51x		More than 50% larger viewfinder
		Longer battery life	850 shots	vs	660 shots		Around 30% more shots per battery charge
		Less shutter lag	208 ms	vs	273 ms		More than 20% less delay when taking photos
		Has a built-in focus motor	Yes	vs	No		Autofocuses with all autofocus lenses
		Has a pentaprism viewfinder	Pentaprism	vs	Pentamirror		Pentaprism viewfinders are typically brighter
		Slightly less startup delay	300 ms	vs	500 ms		40% less delay when turning on
		Slightly larger sensor	APS-C 23.6x15.8mm	vs	APS-C 23.6x15.6mm		Almost the same
		Shoots slightly faster	4.5 fps	vs	4 fps		More than 10% faster continuous shooting
		Better viewfinder coverage	96%	vs	95%		Almost the same
		Thinner	3"	vs	3.1"		Almost the same

所有跟帖： 

• 學習了，多謝！看過你的許多文章，感覺你確實是內行。 回複：好價錢！不過D90有些老了。 -372101- ♀ (0 bytes) () 08/13/2013 postreply 19:22:18

• 隻是感覺D90的單價始終高於D5100。也許是有某種原因。 回複：好價錢！不過D90有些老了。 -372101- ♀ (0 bytes) () 08/13/2013 postreply 20:30:41