One aspect of digital photography that I've grown to love is how quickly and easily I can access pictures I made over a decade ago. Beats digging through negatives or hauling out slide carousels!
Lately, I've been revisiting older images I shot and processed, some from years ago. The inspiration for this was reading some articles and tutorials online. I quickly discovered that this was a valid exercise; my post-processing skills have improved over the years, most notably in the past two years. Images I processed a mere year or two ago, that I felt were good at the time, might just benefit from a second look and some additional experimentation or application of techniques I've learned.
Case in point is the first image series below. A shot I took at Lake Louise in Banff, Alberta in 2012. The original image was over exposed and hazy.