I use a T2i as well as XS cameras. The T2i has a resolution of 5184x3456 pixels, while the XS is 3888x2592. The original size images are too large for web publishing, so need to be downsized. I like to publish at a size between 600 and 1000 pixels tall, to have a large enough image to view details but not so large as to go beyond a 1080P monitor. So I will downsize the T2i image by 4x, to 1296x864, and the XS by 3x, to the same size, 1296x864. In the end you can't tell which camera I took the shot with.
You can crop the image during downsizing if you want it to be square, or to be a particular size. Let's say you want to crop to 800x800, which is what most folks recommend for web publishing. You would then crop the original T2i image to 3200x3200, or the XS image to 2400x2400, and then downsize both to 800x800. I like to keep a little area around the coin so that I can do some cropping if desired. I do a 20x20 grid, and frame the coin to 18x18, so that I can crop/downsize to 800x800 and still have just a little bit around the coin.
In the above examples, I describe integer downsizing of 4x on the T2i and 3x on the XS. This is preferred as it gives the best final image sharpness. If you do non-integer donwsizing, for example to 1200x800, the final image won't be as sharp. You can get back some of this with extra sharpening, but then the image isn't as natural looking.
Try it for yourself to see what the effect is. You may not have any issue with it.
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http://macrocoins.com 
Posted 05/10/2017 10:57 am
