It’s great for macro-style nature shots, but is not much use for portraits. As we’re dealing with a phone, which has a very small lens and a small sensor, you’ll only notice this natural bokeh if you get very close to your subject. You can get a degree of background blur by using the natural depth of field of the camera’s actual lens. But what can you do if your phone doesn’t have one? So far, we have talked about phones with built-in bokeh modes. If you don’t have a bokeh mode, get as close as possible Shooting a scene with a background of these small light sources is one of the best ways to get a true DSLR look. They become distinct circles of light, not just blurred blobs. Shoot with some narrow-source lights in the background, perhaps some fairy lights, and these bloom out. The best bokeh modes also emulate some of the specific effects of wide aperture optical lens blur. It’s easy to think of bokeh modes as just simple blur filters, but there’s actually more to the blur process than simply finding which parts to blur. It’s called light field photography, seen in Lytro cameras. There is an area of photography that does exactly this, though. If the background has a slight blurred effect because of the camera lens’ natural depth of field, you can’t suddenly make it pin sharp post-shoot. Bokeh modes may use supplementary images, but do not usually combine a whole series of them taken through the phone’s focus range. This means you should still be careful about selecting your focus point when actually shooting, particularly if your subject is relatively close-up. There’s still a conventional flat photo at its center. When a phone re-blurs an image post-shoot it is simply applying a very clever software filter to an image with an associated depth map. Post-shoot customizable aperture also usually means you can re-pick your focal point after shooting. The Samsung Galaxy S9 has a lens with a variable aperture You still need to focus You can alter the virtual aperture as you shoot, or after doing so when looking at the image in the phone gallery. Some of Samsung’s phones have variable aperture with a physical iris that changes the size of the hole too. Huawei’s background blur modes let you go all the way from f/0.95, for very pronounced blur, to f/16, a setting that adds no additional blur. When you alter aperture in a conventional camera, the ‘hole’ that lets in light gets larger as the f/stop rating number decreases. Tweak the ‘aperture’ pre or post-shootĪ lot of bokeh phone modes let you simulate different camera lens apertures, measured by their f/stop rating. Given that’s what you’re trying to avoid, it makes sense to review your snaps after the shot to check nothing is awry. While the final image will still look good if the outline of the glasses’ frame is maintained, this is a giveaway that it was taken with software enhancements, not using a traditional optical effect. Phone bokeh modes tend not to add any blur to these elements. Shot with a large-sensor and wide aperture lens, the image seen through the glasses’ lens would also be blurred. Someone wearing glasses with their face angled away from the camera is the classic example. Transparent, translucent and reflective objects can also cause bokeh problems. Credit: Apple Avoid too many reflective and translucent objects Frizzy or messy hair, angled beard shots and other complicated textures like this make creating a clean delineation between in-focus and blurred parts very difficult.Ī bokeh photo shot on the iPhone XS. The kind of patterns you want of try to avoid are those that mix small parts of the background with the foreground. However, complex outlines will still outfox even the better sensors on modern smartphones. Keep object outlines simpleīokeh modes have improved significantly since they became somewhat popular on smartphones in 2014. If you can, get at least 2 meters between your subject and any surrounding objects. By shooting scenes where there’s a clear delineation between the two, you are far more likely to get clean-looking results closer to what a DSLR with a wide aperture lens would produce. Problems in blurring algorithms are often caused when there’s some question over where foreground becomes background. The most important tip of the lot is to make sure there’s a big gap between foreground and background. The gap between foreground and background The iPhone X and XS have bokeh mode on the front camera too.
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