Free Diving Articles – Contribute Your Own!

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Articles in this section are geared toward the free diver, but can provide useful information to every diver. Articles about training, how to, reef dives, etc. are just a few of the many topics that can be found in this section.

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Viewfinder Parallax Marks

What are all those lines in the viewfinder?

What do those annoying lines in the viewfinder mean? Generally, there are three types of lines in the viewfinder. One set of lines tells you where the edge of the picture begins. Another set, seen on auto and manual focus SLR cameras, are the focus zone marks. Focus area marks are usually a circle and/or bracket box in the center of the viewing area. We won’t be dealing with those in this article. The others that look like notches or lines across the top of the viewing area are called parallax marks or lines. (See fig. 1,2 and 3 for examples)

Keep Reading

Underwater Camera Housings

Our Underwater Camera Housings section provides information about different types of housings, amphibious cameras, and the maintenance of them. Knowing how to care for your camera housing is an important factor in protecting your camera investment.