Photo Tip of the Week
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It's not difficult to maximize the success ratio of an autofocus (AF) system. However, certain circumstances pose a greater challenge.
Autofocus technology has been significantly improved since it was introduced 27 years ago. Even so, some photo enthusiasts insist that even the best systems in recent interchangeable-lens cameras are far from reliable.
The majority of digital cameras feature a 5x optical zoom lens, with a focal length range around 28-140mm (35mm equivalent). But there are many models with an 18x or 26x or 30x lens, and even one with a built-in 50x zoom, Canon's PowerShot SX50HS.
Now that prices for full-frame DSLRs have dropped to a relatively affordable level, it may make sense to add one to your system, retaining your faster small-sensor DSLR. That's what I did and owning two DSLRs, each with its own advantages, offers the best of both worlds.
Unlike the 35mm SLR cameras of the past, most digital SLRs use a sensor smaller than the 24x36mm film frame. However, you can also find a few "full-frame" DSLRs that capture images on a larger 24x36mm CMOS chip.
If you own a 16+ megapixel camera (especially an interchangeable-lens model), you may want to get a large-format photo printer. A 13x19-inch format machine is also ideal for scrapbookers.
In this week's Photo Tip, I'll outline the arguments in favour of zoom lenses, and explain why these days, I own only one "prime" lens, a 105mm f/2.8 Macro
Walk into any major camera store, or check a retailer's Website, and one fact will immediately become evident. Zoom lenses greatly outnumber the single-focal-length or "prime" lenses. Some serious photographers are still wary of zooms, but others have switched almost entirely to such lenses.
Now that many Canadians are planning trips south for the winter, it's worth checking out some of the cameras in the "tough" category. The current models are waterproof to a depth of 10 or more meters, so they're ideal for use in a pool or while snorkelling in the ocean.
Nearly all digital cameras today offer many high ISO options, with sensitivity levels up to ISO 1600, ISO 3200, or even higher. These are very useful, since they allow us to shoot at a faster shutter speed in a dark location.