Centering question

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Posted By: Dave

A quick way to estimate centering is to eyeball the two sides and guess when one is 2x or 3x or 4x the other. If one side were twice the other, then the ratios are 33/67, which is very close to 30/70.

Here's the values:

2x: 33/67
3x: 25/75
4x: 20/80

A measurement will always be better than a guess, but it is amazing how good you can get with your eye if you practice on a handful of cards that you measure first.

I've used my photo processor to measure this as well from a scan. I crop the picture to the width of one border, and do save as. Under jpg options, there is a bit count; it will tell you how many pixels wide the border is. Cancel out, and do the same for the other side.

Dave