Still photography

X-Ray Mag Photo Challenge: Comparisons

Comparison III and Comparison IV by Sheryl Checkman
Comparison III and Comparison IV by Sheryl Checkman

Back in 2020, we challenged underwater photographers—many of whom found themselves stuck inside or unable to go diving during the pandemic—to search through their image archives and match a topside shot with one of their own underwater shots, in a side-by-side comparison.

Proper Export of Underwater Images in Postproduction

Lionfish, the image to be used for this tutorial
Lionfish, the image to be used for this tutorial

In this series of articles on postproduction of underwater images, we have worked a lot on white balance settings, basic and advanced exposure corrections, contrast and curves, advanced techniques of removing colour casts, basic and advanced retouching, final colour boost, cropping and sharpening. Finally, our image is ready! And now, we arrive at the question: What do I do with it?

Thomas Peschak

Thomas P. Peschak is a marine biologist based at the University of Cape Town’s Marine Biology Research Institute, where he conducts scientific research on kelp forests, illegal fishing and the ecology of sea otters. He is an experienced field biologist and professional diver who has worked extensively in Africa, Central America, the Middle East and the South Pacific.

Ikelite Underwater Housing for Canon EOS R5

It is made of ABS-PC (an advanced form of poly-carbonate), is depth-rated to 60m, features Ikelite’s own “dry lock,” has a valve for a vacuum pump, weighs only 5.4 lb (~2.4kg) with tray and handle and is compatible with Ikelite’s DL system lens ports. The included manual hotshoe, with Ikelite ICS-5 bulkhead, supports manual strobe exposure with a wide variety of strobes, including Ikelite, Sea&Sea, Inon, Retra and others. For Ikelite strobes, an optional TTL converter can be added.