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Re: diff maybe
In reply to Mako2011,
4 months ago
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Mako2011 wrote:
nfpotter wrote:
Mako2011 wrote:
nfpotter wrote:
TAM63 wrote:
Little confused by that - I'd think if you cropped in software, you'd be keeping the bit from the center of the lens.
Whereas if the camera was doing it, then it'd use the whole lens, and not just the presumably sharper center.
Am I missing something?
You're missing something.
Not really
If I'm using the full frame, and I put my subject at the very side/top/bottom/corner, then that MAY be a part of my lens that is less sharp than the center. If I'm using the 1.3x crop mode, I'm just using a "chunk" out of the center of the frame, about 15 MP out of the 24 MP full-res.
In "crop mode" you are not using the full frame. The image that hits the sensor is the same in both cases. In PP you're cutting away the outer part of the image and only using that part of the image that hit the 80% center of the sensor. In "crop mode" you're only recording what hit the center of the sensor. In both case..the same photons hit the same part of the sensor and passed through the same center of the lens. In crop mode you get a square in the middle of the viewfinder you have to frame your photo in. Only advantage to "crop mode" is smaller file size faster FPS......I think
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My opinions are my own and not those of DPR or its administration. They carry no 'special' value (except to me and Lacie of course)
See my other answers. We're speaking the same language, it's just a matter of semantics.
But no. You're incorrect. If put your subject 1/3 of the way into the frame at full resolution, your subject is closer to the edge of the lens, vs. putting your subject 1/3 of the way into the 1.3x crop area.
You can't put the subject closer to the edge, as in the D800, crop mode means the sides of the view finder are grayed out. The only physical difference in the two images is in size of the initial file. The final file (after cropping the non-crop mode pic) in both cases is identical and obtained from physically the same part of the sensor and shot through the same portion of the lens. Crop mode is like putting a little cardboard window in the viewfinder that blocks the sides and only recording what you can see.
In other words, the 1.3x crop mode helps you nail framing closer to the center of your lens, in some cases (speaking from a compositional standpoint).
Maybe we are speaking the same, but I can "crop mode" in my mind just as I can imagine what the pic will looked cropped...without needing to grey out the sides of the viewfinder, I got the impression you were suggesting there was a difference in the two resulting images (crop mode vs crop in post). There isn't.
--
My opinions are my own and not those of DPR or its administration. They carry no 'special' value (except to me and Lacie of course)
No, of course it's the same pixels. However, in the real world, most people (at least ones that think about composition) are going to frame based on things like the "rule of thirds", or "golden mean". SO, if I do that in full resolution, and I crop to a 15 MP image, I MAY be using pixels further away from center, than if I had used the same framing/composition already in crop mode. Both end up being a 15 MP image, but the latter used more pixels closer to the center of the lens, and thus a potentially sharper image, given the same composition.
Perhaps that explains my way of thinking better?
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