Читать книгу Canyoning in the Alps. Graded routes in Northern Italy and Ticino, Austria, Slovenia and the Valais Alps онлайн

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The problem with low light

In low light, a camera set to auto may do one or more of the following.

 Increase the aperture This reduces the depth of field, which could result in unwanted blur or ‘bokeh’ (more likely with telephoto lenses).

 Decrease the shutter speed This could result in blurred subjects or scenes.

 Increase the ISO This makes the sensor more sensitive to light, but images tend to be grainier and less detailed. The large sensors in DSLRs cope far better with high ISOs than the tiny sensors of compact cameras. At ISO 800 (frequently required when canyoning), shots taken with a compact camera often look terrible.

 Fire the flash. In-built flashes are not usually powerful enough and often create a snowstorm scene as their light reflects off airborne water droplets. Better to turn the flash off.

Tips to improve photos in low light

 Take control over aperture, ISO or shutter speed. This is usually easy with DSLRs, impossible with compacts and long-winded (via fiddly on-screen menus) with mirrorless interchangeable-lens cameras.