He's Tony Kuyper's protege. In his video tutorial he recommends downsizing the original to 167% the size of the final (1st pass) then downsize that to the final size (2nd pass). But he's not the only one saying this. I'm reading this multiplier, two-thirds (1.67), all over the web as though it were a magic number, but I can't find any techy stuff to convince me it's true (or at least convince me the opiner knows what he's talking about).
If I understand your book Image Sharpening correctly, I should downsize a 5600 pixel wide image to a 1280 wide like this:
5600 x 50% = 2800 then
2800 x 50% = 1400 then
1400 down to 1280 [rounding off on the last pass instead of the first pass]
and most importantly, the multiplier above should never be lower than 50% because that would entail too many downsizing passes, which would throw too many pixels away.
Am I hot or cold?