Resizing

wooster

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My fellow photographers. I have made a discovery. After several years of taking digital photographs I have failed to grasp the concepts of resizing images completely. I will now ask a really silly question and I ask for your patience.

The only resizing I have done is when exporting RAW Files as jpegs for use on the web or email. I know how to do this.

However, I keep reading about images needing to be “downsampled” to a given size in order to compare resolution differences in cameras.

Now this makes sense to me because, other than images being a bit larger ( and so showing a little more detail ) I see no difference between high resolution sensors and lower resolution ones when viewed at 100%. However I assume to do this, I need to reduce the length and width of the image while maintaining the number of pixels to effectively increase resolution. Obviously, if I reduce the number of pixels, I’m throwing resolution away so the downsizing is going to have either no effect or a deleterious effect on the IQ.

I’m a bit confused as to how to achieve this result with LR can anyone explain to me how to do this?
 
Downsampling isn't for comparing resolution differences... it's for comparing "equivalent results/output." It does discard resolution...

The reason you're not seeing much difference between sensors is probably because the lens/technique is normally the limiting factor... typically to something MUCH less than the sensor is theoretically capable of. There's usually some small % increase, but it typically takes a significant difference in sensor resolution for it to have much/any visual impact.
 
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