You'll find that a larger sensor captures a wider field of view, has more surface area for light to hit and so will generally outperform a crop sensor for low light purposes. Low light is also where the Full frame vs. It's a number mostly for marketing purposes, as manufacturers can claim your mid range camera has an extended ISO of 102,400 (which is, in practice, useless.) This uses the software in the camera to brighten the image even further, this is the same as adding exposure in post processing. Basically, ISO numbers reflect how sensitive the sensor is to light before the noise makes it unusable.Ī note about extended ISO: Once you've pushed the physical sensitivity of the sensor to it's maximum, manufacturers will add 'extended ISO'. This allows you more flexibility to shoot in lower light without sacrificing aperture or shutter speed. The boundaries of high ISO performance are pushed further with every new camera body on the market. Those are some of the moments where you can capture the most brilliant shots, but only if you're equipped to do so. Low Light and ISOįYI: ISO was developed by the International Organization for Standardization and originally quantified the “speed” or sensitivity of camera film but now also applies to solid-state image sensors found in DSLRs.Įveryone expects low light in wedding photography or while photographing stage performances, but you'd be surprised how often you are shooting in shaded groves off a hiking trail or catching an animal out eating in the early morning, or after sunset. It's important to look at the AF system as a whole, including your lens pairing. Newer bodies often have faster processors and more refinements in the AF system, providing faster more accurate results. The number of points isn't the entire story, so don't be deterred if your camera choice happens to have a few less than another. More areas you can tell the sensor to pay attention to, more areas in which the processor can track your subject. Generally speaking, it's better to have more autofocus points than less. You’ll find lower end cameras, camera phones and micro four thirds cameras are forced to use significantly slower contrast-based systems. You'll find the more expensive professional DSLR cameras generally have more auto-focus sensor points, use phase detection and rely on faster processors and more refined algorithms to find focus quickly.ĭSLR technology as a whole wins hands down in the auto-focus realm as it uses a technology called phase detection. Nature moves, no matter how still it may seem you will miss some of the absolute best shots if you have a slow auto-focus. Auto-FocusĪuto-focus is an important feature. When shooting wildlife effectively you'll find you rely on fast, accurate auto-focus, good low light capability, quick burst rate, durability, weatherproofing and most importantly telephoto lenses.
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