What camera for $400-$450? Have Nikon D5100 and Canon T3i, any others?

Started Jan 17, 2014 | Discussions thread
(unknown member) Senior Member • Posts: 1,324

Ontario Gone wrote:

KCook wrote:

Which is why I posted that this depends on precisely how you define IQ. If IQ is defined as the lowest possible noise vs intrinsic sharpness, then yes, the big sensor wins (oh duh). But that is a pixel peeper game. Many casual shooters are happy with nice color, contrast, and apparent sharpness. Which are largely independent of sensor size. So far, from the flavor of the posts by the OP, I'm not persuaded that he is a pixel peeper.


This still makes no sense, because color, contrast, and local contrast (sharpness) can all be manipulated in PP. This is like people who claim a certain camera has "better" color than another. Color is completely controllable in post, and even low contrast lenses can be corrected in post. Im not picking on you, but im saying IQ is IQ, and there's only two sources: The lens, and the sensor. The lens is the weak link because you can't actually make a photo sharper in post, you can only increase contrast. Most people define IQ by one criteria. The more light you get, the better the signal will be, assuming all other factors are equal.

The RX100 is a nice camera, but it will never match the IQ of a camera with the same F stop and a larger sensor, no matter how much PP you do.

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"Run to the light, Carol Anne. Run as fast as you can!"

What is going on in here? OntarioGone being the voice of reason? Good thing I'm sitting down!

OG is correct, the bigger the sensor, the better the S/N ratio in general. There are slight differences between same sized sensors, but the bigger you go, the more you get in performance. OG is also correct about the noise: you can crush it and crush detail with it, you can sharpen the image which generally introduces more noise, or (these are the smart options OG didn't mention): you can remove chroma noise while keeping or only slightly reducing luminance noise, giving you a grainy but clean image. Chroma noise looks bad, luminance noise is perfectly fine up to a certain point. The smart thing to do when sharpening is to only apply edge sharpening, that way the sharpening doesn't add noise (luminance noise=grain) throughout the image.

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