So, without further ado, lets get down to the test and see which aperture performs the best on the DJI Phantom 4 Pro.Īll images were shot at ISO 100 with varying shutter speed to balance out exposure, the gimbal was locked so movement was not an issue. This flaw is called lens diffraction. Another point to consider is lenses widest aperture can often be pushing the optical limits to be as wide as possible and have a lot of distortion or lens discrepancies such as chromatic aberration (the blue or red halo edges around some subjects) which boils down to being unsharp.
An f/22 image when looked at closely will be very soft and flat detail. It's to do with the optics as less image detail is entering the lens as well as more refracting light inside the lens barrel from more aperture blade area. Between a few stops its quiet negligible, but a big difference can be seen at the limit of the lenses smallest aperture. As the aperture is made smaller, less light gets in, and the depth of field increases, but - the sharpness of the image is reduced. Now, here is the advanced part which is the crux of this article.
A large depth of field (f/22) will have a great amount of the overall scene in focus. A small or shallow depth of field has a very limited plane of focus, everything around that focus point will be blurry and more so the further away from that focal point. As the aperture gets wider the depth of field gets shallower. Depth of field is the amount of area in your image that is in focus. However, aperture also changes other elements to consider and this is where the amateurs get separated from the intermediates and intermediates from the advanced.ĭepth of field is changed dramatically by aperture. All lenses are different with aperture range, generally speaking the large more expensive lenses can go wider and let more light in. F/2.8 is a standard wide limit and f/22 is a standard smallest limit. The smaller the number the larger the aperture. By making the aperture smaller we reduce light entering and thus have more control over exposure.Īperture is measured in 'F-stops' and written as f/2.8, f/4.0, f/5.6 etc. Before reading on there is a few terms you need to know to understand the purpose of this test, check you know them all.Īperture is the physical diaphragm made of overlapping blades that light passes between when entering the lens, the wider open this is, the more light will pass through to the sensor.
0 kommentar(er)
