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35 mm equivalent reproduction ratio: the photograph on the left was taken with a Micro Four Thirds (2× crop) sensor camera and a 50 mm macro lens at 1:2 magnification. The photograph on the right was taken with a full-frame (35 mm) sensor digital SLR camera and a 100 mm macro lens at 1:1 magnification.
Stepwise magnification by 6% per frame into a 39-megapixel image. In the final frame, at about 170x, an image of a bystander is seen reflected in the man's cornea. Magnification is the process of enlarging the apparent size, not physical size, of something. This enlargement is quantified by a size ratio called optical magnification.
For example, a 28 mm lens delivers a moderately wide-angle FOV on a 35 mm format full-frame camera, but on a camera with a 1.6 crop factor, an image made with the same lens will have the same field of view that a full-frame camera would make with a ~45 mm lens (28 × 1.6 = 44.8). This narrowing of the FOV is a disadvantage to photographers when ...
That distance is sometimes given on the filter in millimeters. A +3 close-up lens has a maximal working distance of 0.333 m or 333 mm. The magnification is the focal distance of the objective lens (f) divided by the focal distance of the close-up lens; i.e., the focal distance of the objective lens (in meters) multiplied by the diopter value (D) of the close-up lens:
Glass chart. A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.
Olympus 12-40mm F2.8 II 24mm 80mm f / 2.8 f / 2.8 No No 382g 84mm 2022 Current: Panasonic Leica 12-35mm F2.8: 24mm 70mm f / 2.8 f / 2.8 Yes No 306g 74mm 2022 Current: Panasonic Leica 12-60mm F2.8-4 24mm 120mm f / 2.8 f / 4.0 Yes No 320g 86mm 2017 Current: Yongnuo 12-35mm F2.8-4 24mm 70mm f / 2.8 f / 4.0 No No 318g 94mm 2023 Current: Olympus 12 ...
To focus an object 1 m away (s 1 = 1,000 mm), the lens must be moved 2.6 mm farther away from the film plane, to s 2 = 52.6 mm. The focal length of a lens determines the magnification at which it images distant objects. It is equal to the distance between the image plane and a pinhole that images distant objects the same size as the lens in ...
The result is expressed in inches and is usually (but not always) rounded to a convenient fraction. For instance, a 6.4x4.8 mm sensor has a diagonal of 8.0 mm and therefore an optical format of 8.0*3/2 = 12 mm, which is expressed as 1 ⁄ 2 inch in imperial units. The reason it is expressed in inches is historical, dating back to the early days ...