Dp3 Merrill Macro Focus Issues: Am I a dingus?

Started 2 months ago | Questions thread
brendanpaxton
brendanpaxton Forum Member • Posts: 54
Re: This is not a good test image

xpatUSA wrote:

brendanpaxton wrote:

DavidWright2010 wrote:

brendanpaxton wrote:

DavidWright2010 wrote:

exposure of 0.6 seconds? Anything could go wrong. And it looks blurred all over.

David

Nothing wrong with 0.6 sec, We were told the camera is on a tripod (and there is clearly no motion blur in the image).

Here's a 400% crop from the center .It certainly looks blurry to me:

David

Anything will look blurry at 400% crop.

I disagree.

David's zoom above is not smoothed; therefore the blur is in the capture and was not caused by the 400% zoom.

Creating pixels out of thin air where there were none (zooming to 4x the data's resolution, i.e. upscaling by 4x) requires extrapolation of data. The result will always appear blurred. Blurring (i.e. averaging of neighboring points) is inherent to any interpolation or extrapolation process.

The OP's image is sharp in the bottom of the frame. And there is no >>motion<< blur in the image.

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