Learn Digital Photography: Fast Track Your Photography
By Wayne Turner
Basic photographic principles are the foundation for both
digital and film photography. When we ignore them, the basics of
learning photography go out the window. It’s time to bring
photography back into digital.
Learning digital photography in our instant society is only
possible by applying the basic principles of good photography.
Digital is another tool and there is no real fast way of doing
this. BUT… If you are prepared to follow these six quick
photography principles you’re on the road to learning digital
photography fast. And I really mean fast. So here goes.
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Equipment
Underwater photography is one area where you definitely need special equipment, and special techniques to go with them.
There are two main solutions to the problem of taking a camera underwater: dedicated underwater cameras, and housings which keep regular above water cameras from getting wet.
For some years most professional underwater photographers used dedicated underwater cameras as their primary means of doing underwater photography. Although several systems exist, including cameras by companies like Sea and Sea with their Motor Marine line of cameras, the market was dominated by a division of Nikon called Nikonos, and by one camera in particular, the Nikonos V.
Dedicated Underwater Cameras
The Nikonos V is a strange candidate to be the world’s premier underwater camera. It’s a manual camera – a seriously manual camera. It’s not a single lens reflex (SLR) camera or a rangefinder camera, it’s more like a point-and-shoot camera where the scene through the viewfinder only corresponds roughly with what will appear in the final shot. Furthermore, this is a point-and-shoot camera which must be focussed manually without any mechanical, electronic or optical aids! The lens has two knobs on its side, one of which selects the aperture, and one of which selects the distance between the camera and the subject. Before taking a shot you must mentally estimate the distance between yourself and the subject of your photo, and then dial this into the lens before pressing the shutter release. After taking a shot the film must then be advanced manually! Read the rest of this page »
The Equipment
Most insects are small, so you’ll need equipment to magnify them. You can use a long lens with close focus of less than 10 feet, fit a diopter lens to the front of a regular lens, fit macro extension tubes between a lens and the camera body, or use a dedicated macro lens. Long lenses with focal length of at least 300mm have the advantage that you can take a photo while still at a distance from the insect, which makes approach much easier. Extension tubes are simply hollow tubes with no glass in them which are mounted between a regular lens and the body of the camera. The effect is to reduce the minimum focus distance of the lens – if the lens previously could focus no closer than 10 feet, then with extension tubes it might now focus as close as 5 feet. They come in different sizes and can be stacked on each other; since there’s no glass involved, there’s also theoretically no degradation of the image. I’ve never used diopter lenses so I can’t comment on them.
However none of these approaches to increasing magnification can compete with a dedicated macro lens. These lenses are typically the sharpest and clearest lenses in any manufacturer’s inventory – other lenses will be longer, more expensive or faster, but because of the obviousness of any optical aberrations in a macro photo, the macro lens will have the best optical characteristics of sharpness and clarity – something which makes them fairly unsuitable for portrait photos, since they’ll show up every fault of the subject! When pointed at an insect, such a lens can show up the very fine details like the hairs on the body, facets of the lens of the eyes and scales on the wings. Read the rest of this page »