Wish Nikon gives us 2x crop on a D800/D800E/D600/D4 via a firmware upgrade

Started Mar 19, 2013 | Discussions thread
jfriend00 Forum Pro • Posts: 11,700
Re: Wish Nikon gives us 2x crop on a D800/D800E/D600/D4 via a firmware upgrade

shaunly wrote:

shaunly wrote:

What would be the advantage to your 2x crop vs. just cropping as desired in post processing?

Same as with the 1.2x and 1.5x crops - metering only for the cropped area (with hopefully better metering for that area), the autofocus points being all inside the cropped area in the auto mode, etc.

You can set focus points to 21 or 9. You could also use center weighted if you really want to limit the metering area.

Each to their own, I guess, but I've never found it advantageous to set one of my cameras into a crop mode. I'd rather have the option of full screen or crop in post rather than limit myself onto to the crop area. Plus, you always get better results if you don't need to use the crop. A 2.0 crop would be throwing away a ton of DR, noise performance and resolution.

The one reason I understand an advantage of a crop mode is if the camera goes to higher fps when in crop mode (as the D800 does at 1.3x) or the D7100 does in it's 1.3x). But, you didn't cite that reason and I don't think that's going to help anything in the D800 when going to 2x as the mirror probably doesn't go any faster.

In camera crop doesn't "throw away" anything. It's the same thing if you were to crop an image yourself in PP. I think you need to get a better understanding on this. The DR and ISO stays the same. Think about it this way, the camera is cropping the sensor output NOT the disabling the outter sensor border. So it's still using the full potential of the sensor.

The advantage for in camera crop is smaller file size (RAW and Jpeg) and convenience. It always nicer to have options.

Uhhh, you do lose DR and high ISO performance when you crop (whether it's done in-camera or in post processing). Why do you think FX has more DR and high ISO performance than DX? DX is just a crop of FX. When you blow up the image more (because you cropped it and then must magnify the remaining pixels more), you magnify the noise. Further, when you have fewer pixels in the output, the noise contribution of each pixel is more visible in the final output. And, one factor in DR is the noise floor so you lose noise performance and DR when you crop. This is math and physics at work.

Sorry but you're wrong. I can take a picture at 36mp and a 1.5x crop, both raw and both will have the same shadow and highlight recovery. I can post samples if you really want me to.

Sorry, but this is not correct.  Cropping lowers noise performance and raising the noise floor loses DR.  Why do you think smaller sensors have worse noise and DR performance than larger sensors?  If you have an appropriate way of measuring the actual performance, any experiment you run will show this.

Also the D800 at 100% noise level is very close to the D700 at 100%. So even if I crop it down to 12mp, the noise level will still be on par at the same viewing/print size.

D800 and D700 are different generations of sensor technology (the D800 improved significantly) so I'm not sure what you're trying to illustrate with this.

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