7D's image is really softer than even a 50D
Really? Decided to put this diffraction s**t to the test at f/11. 17-55 f/2.8 IS USM lens on 450D vs 7D.
Tripod mounted. Manual focus. RAW to jpeg using LR 2.6.
Both shots @ 55 mm, ISO 100, f/11, 1/25 sec.
Overall:
Now, 450D left and 7D right. Roof shingles. 450D upscaled to 7D resolution to demonstrate what happens when the images are printed on the same scale:
Well, so much for this diffraction garbage. Even with diffraction in place, the 7D still out-resolves the 450D.
There's another comparison of 7D vs 50D/500D vs 1Ds3
here where the photographer has used a sharp macro lens to prove the 7D shows MORE (albeit not substantial) details than the 500D/50D sensor.
Unless Canon has gone bonkers and decides to sell WORSE cameras at higher prices, the only other possibility is that many folks have no idea what they're talking about. The challenge with 7D is that one needs to use defect-free copies of good lenses (without any decentering defects) to fully make use of that 18 MP capability. Anything less is a disservice to the camera. :bsmilie:
a crop can never overtake the light + detail gathering prowess of a FF camera.
Due to its larger sensor, the 5D has more light gathering ability at the sensor level. Consequently, its greatest advantage over smaller sensors is low shot noise, i.e., in well-exposed portions of a scene. HOWEVER, when it comes to read noise (due to electronics) at the pixel level, the 5D sensor is showing its age. So, in the very dark areas of a scene or at VERY high ISO levels, the 7D will easily outperform the 5D. The awful high ISO banding of the 5D only makes it worse.