![]() The effect of this is that a point image is rendered as a disc, rather than a point. Out-of-focus effects are caused by the image plane being behind or in front of the plane of focus of a lens. The high price is because of the fact that this lens is designed to give a very characteristic bokeh that is prized by many users. This optic was the subject of a successful Kickstarter campaign, and is a simple three-element Cooke triplet that sells for US $1,700. ![]() The lengths and expense some people are willing to go to in order to achieve a particular bokeh effect is illustrated by the recent launch of the Meyer Optik Trioplan100mm f/2.8 lens. It refers to the quality of the out-of-focus parts of an image, so its meaning is restricted to images that have been shot using narrow depth of field to make use of accentuated differential-focus effects. Note how even the left eye which is only 1.5cm away is starting to go out of focus and almost completely blurred background.Bokeh, or boke, is a Japanese term that has become popular over the past 20 years or so. Camera to subject distance is approximately 50cm. Distance from the doll to the window is about 220cm (2.2m). Distance between two eyes is about 1.5cm. What you see as background is a window with partially open Venetian blinds. This time I have moved Dora to a different location to separate the background and moved the camera in while keeping the focal length and aperture unchanged. ![]() Subject to camera distance is about 100cm (1m) – Focal length 50mm, Aperture f/6.3 – Note how the background it staring to go blurry from just behind the toy. The distance between the toy and the wall of the playhouse, which is the background, is about 45cm. ![]() Please note that ‘Princes Dora’ is only about 14cm tall. Here are two quick examples shots illustrating what Olympus OM-D E-M5 quipped with a 12-50 mm f/3.5-6.3 kit lens can achieve depth of field wise. Open up your lens as much as possible – you don’t always have to have f/1.2 lensesĭepth of field of any camera & lens combo at a given focal length and aperture can be calculated by using lens formulae, or more easily by using any decent DOF calculator, but nothing beats a real life example.Zoom in – use the longest possible focal length.If you want a detailed description on DOF control please read this to have better understanding With that out of the way let’s see how we can overcome the smaller sensor size and the slower apertures to create a ‘narrow’ DOF image with a pleasing bokeh by concentrating on other determinants of DOF. This is why lenses with 9 blade diaphragms create better bokeh than the lenses with 7 frame diaphragms. Rounder the aperture more pleasing the bokeh is. ![]() While the depth of field directly influences the bokeh, it is actually generated by the shape of the area passing light on to the sensor, which is the aperture. In other words, bokeh is the quality of an out of focus point on the sensor as rendered by the lens. Word about bokehīokeh is defined as the way a LENS renders an out of focus point of light on the sensor. While I agree most of those concerns are valid, I think most new photographers keep on forgetting the other methods available to control depth of field.įor those who are interested here’s one of my lengthy posts from the past about depth of field determinants. One concern people expressed when considering a micro four thirds cameras was their smaller sensor size and most of the relatively slower lenses creating a comparatively larger depth of fields and less than pleasing out of focus points (bokeh). I have received few questions about depth of field control with micro four thirds cameras after uploading the post about Olympus OM-D EM-5. ![]()
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