I participate in a weekly photo challenge on the site DPChallenge. Besides taking the photo, one of the challenges I often face is getting photo to be the right file size for submission (either 150K or 200K depending upon the compeition). Photoshop has a quality slider when using Save for Web, and a readout of the file size on the status bar that updates as I move the slider, but I’ve found it to not be entirely accurate. It can be a few K off, so even though it says my file will be 149K it might come out at 152K instead. I often have to save the file several times to get the file size correct.
Today I came across this great tip on Planet Photoshop blog. It turns out that the option called Optimize to File Size which solves this problem for me.
I’m a happy man