The focusing range of this lens is 1.6 to 4 inches. The MP-E 65 macro lens uses triple extension to focus (9.5 inches long at 5X). As the magnification ratio and the length of the lens increases, so does the effective F stop number.
One of the many pioneering efforts from Nikon, system that provides superior picture quality at close focusing distances and increases the focusing range of a lens.
Focusing range - 0.3m (1 foot) to infinity
Exposure method - manual stop-down method
Lens mount - Nikon F bayonet mount
Shift direction - 360°, click stops every 30°
Maximum amount of shift - 11 millimeters ...
There are other options to bring the focusing range of some lenses closer-bellows, extension tubes, diopters-but for the best optical performance and the easiest compatibility with the latest autofocus and auto-exposure technology, ...
1957 LEICA SUMMICRON 50mm f/2 mit near-focusing range.
NEW: LEICA SUMMICRON 50mm Guide.
A summary of these 50mm f/2 lenses, 1953 - present.
The focus and aperture have been set so that everything within a certain distance is captured clearly. However, the drawback is that they do not have a very close focusing range and only a small aperture.
This lens is very expensive but delivers superior image quality over the entire focusing range from infinity to 18 inches.. also for greater magnification Elpro 1:2-1:1 is available at a reasonable price..... Sincerelly,Jan ...
Manual focus —83
Bracketing Focus —85
Checking the Focus and Peoples' Expressions in Playback Mode —85
Checking the Focus and Expressions in Review Mode —86
Focusing Ranges —86 ...
CRC (Close Range Correction) System The Close-Range Correction (CRC) system is one of Nikon's most important focusing innovations, for it provides superior picture quality at close focusing distances and increases the focusing range.
A greater frustration - at least to anyone with a collection of older Nikon lenses - is that AF is unavailable with non AF-S optics. Fortunately, the D3000 does offer an effective (and very accurate) manual focusing rangefinder indicator in the ...
specially designed for close distance photography. Lense designers adopted a system where mechanism moves certain lense components as a unit automatically correcting for aberrations. This assures high lense performance throughout the focusing range.
A certain drawback is the need to "pre-focus" long tele lenses (300mm & up) off infinity because the shifting distance of the film back does not reach out to provide focusing over the whole "normal" focusing range.
 See also: Lens, Focus, Focusing, Camera, Lenses
  
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