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Re: A world of mendacity
In reply to Barrie Davis,
4 months ago
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Barrie Davis wrote:
miketuthill wrote:
Barrie Davis wrote:
miketuthill wrote:
Barrie Davis wrote:
miketuthill wrote:
However, if I take a shot of a bird with my 70-300 with both a Nikon D700 and a Nikon D300 from the same spot the bird in the D300 shot will be larger in the resulting image thus the apparent increase in focal length. I would have to crop the D700 shot to get the same apparent sized bird and would lose pixels in the process. So it's not as simple as it seems.
On the contrary. It is a simple as it seems.
The image is physically the same size on the sensors of both cameras. The sensor is just smaller in the APS camera, so a greater percentage of that sensor is filled. The image only gets larger when displayed because it is enlarged more.
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Regards,
Baz
"Ahh... But the thing is, these guys were no ORDINARY time travellers!"
But, there are more pixels in the D300 bird. I would have to use a 450mm lens on the D700 to get a bird with as many pixels as the 300mm D300 shot. There's why one can look at the 300mm being equal to a full frame 450mm lens.
The number of pixels imaging the subject of shot does not influence the Field of View in any way...
... only how much you can enlarge your image without pixelation taking place... which itself assumes the lens has sufficient resolution to take advantage of the higher pixel density.
And all things being equal that makes my 300mm lens on a D300 provide the same FOV as a 450mm lens on a D700. For those of us who shoot birds that is a significant advantage for the DX format.
Nobody is denying that.
It's just cropping to get a tighter framing...nothing special is happening. You could crop with the full frame and get the same shot... (number of pixels tiling out the subject is irrelevant, as long as there are sufficient.)
Bingo! And when you shoot distant birds (or any distant object) there are occasionally instances where the D700 pixels are not sufficiently numerous once cropped thus the DX crop factor advantage.
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http://miketuthill.zenfolio.com
http://mtuthill.smugmug.com
http://www.pbase.com/miketuthill
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