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ISO ON CAMERA MEANING ISO
The higher the ISO value, the less light the sensor needs to create a well-exposed image.įor photos that contain the least noise (that unsightly speckling you see in low-light shots) and the most detail, you want to keep the ISO as low as possible. It refers to the sensitivity of a camera's imaging sensor to light. Fortunately, it's also often the one you have to worry about the least when taking photos. ISO is perhaps the most alien-sounding of all the basic camera settings. So why, you may be wondering, is the Galaxy S9's lens described as 26mm? That's because its view of a scene is equivalent to that of a full-frame (or film) camera with a 26mm lens. Divide the focal length of the lens by the f-stop rating and you get the width in millimeters of the lens opening. As the actual focal length of the S9 camera is 4.3mm, we can calculate the width at f/1.5 as 2.86mm, and that drops to 1.79mm when using the f/2.4 mode.
ISO ON CAMERA MEANING PLUS
However, it doesn’t really come into play when you're taking photos with your phone, as all current phones bar some top Samsung models have fixed apertures, and the Galaxy S9, Galaxy S9 Plus and Galaxy Note 9 can only switch between two settings – f/1.5 and f/2.4.Ī value like the S9’s f/1.5 is the f-stop rating. The aperture value is the size of the opening that lets light into a camera lens, and onto the sensor, and it's one of the most important shooting settings when you use a DSLR or compact system camera. Have a play with shutter speed to see how long you can make an exposure without causing blur, then take the phone out at night, and use this slowed-down exposure to see how much it improves your shots.ĭon’t have OIS? Shutter speed control in your bare hands is much less useful, as slowing it down beyond 1/10 of a second will often cause blur. Using OIS you can take exposures of up to half a second and still get sharp photos, as long as your hands aren't overly shaky. This is optical image stabilization, with a tiny motor in the camera moving the lens to compensate for the 'shake' that can occur when you hand-hold your phone. No tripod? You can still get great results if your phone has OIS. Keep the phone still and you’ll be able to take very high-quality night images, or blur motion in a scene for creative effect – an exposure of several seconds turns cars into streaks of light, crowds into ghostly semi-transparent figures and moving water into a milky blur. Slow shutter speed or long exposure photography is one of the best reasons to buy a phone tripod like the Gorillapod.