Kiron 105mm f/2.8

Macro 1:1

by Kino Precision Industries, Ltd.
 Tokyo, Japan
 

              Specifications

       Aperture range: f2.8-f32

       Angle of Acceptance: 23.3 degrees

       Optical construction: 6 elements, 6 groups

       Maximum reproduction ratio: 1:1

       Minimum focusing distance
       (from film pIane): 0.347 m (1.14 ft.)

       Overall length: 102.5 mm (4.04 in.)

       Maximum barrel diameter: 72 mm (2.8 in.)

       Accessory size: 52mm

       Weight: 650 g (22.75 oz.)



 

Mounting the Lens
Nikon, Pentax, Minolta, Olympus, Konica, Yashica/Contax mounts - Use the standard procedure for mounting your camera brand lenses.
Canon mount - Canon mount Kiron lenses have a black mounting ring. Mount the lens with all index marks aligned. Turn the mounting ring clockwise to lock the lens onto your camera.


Exposure Settings
All mounts - Use the same metering procedures you would use with your camera brand lenses.
Note to Nikon owners - The Kiron 1O5mm f2.8 is fully compatible with all Nikon Al and A1-S mounts. Since there is no external meter coupling device on this lens, however, it is not compatible with earlier Nikon F mounts.


Focusing
The Kiron 1O5mm f2.8 focuses continuously from infinity to 0.35 meters (13.8 inches), where the reproduction ratio is 1:1 (life-size). To focus, look through the viewfinder of your camera, and turn the focusing ring until the subject appears sharp and clear.
The distance scale is marked in both meters (white) and feet (blue). These figures indicate the distance from the subject to the film piane of the camera.


Reproduction Ratios
The reproduction ratio is the relationship between the size of the image on the film and the actual size of the subject. For example, if the image on the film is one-half the size of the actual subject, then it is said to have been reproduced at 1:2, or 1/2 life-size.
The reproduction ratios from 1:10 to 1:1 are indicated on the lens barrel in gold. To photograph an object at a predetermined reproduction ratio of, for example, 1:2, turn the focusing ring untii it lines up with the mark opposite 1:2 on the lens barrel. Then move the lens closer to, or farther from the subject, until it appears sharp and clear in the camera's viewfinder. Or, if the reproduction ratiois not known in advance, focus until you have the desired image in the viewfinder. Then look at the Iens barrel to see what reproduction ratio will be achieved.
Since there are no click-stops involved, reproduction ratios between those marked on the barrel, e.g. 1:6, 1:4, are easily achieved.
Greater than 1:1 reproduction ratios can be achieved with the addition of a Kiron 2X MC7 teleconverter. This is a seven-element, multicoated teleconverter that doubles the focal length of the lens, as well as doubles the reproduction capabilities.


Depth of field
Depth of field refers to the area of acceptable focus in front of, and behind the piane of sharpest focus. There is a depth-of-field scale marked in white on the lens barrel. However, since depth of field is so small at high reproduction ratios, a lens opening of no larger than f/16 is recommended. If your camera has the capability, it is desirable to preview the depth of field prior to taking the photograph, so you can see the area which will be in focus. For the sharpest photographs, precise depth-of-field information is essential.


Camera and Lens Steadiness
Again, because of the small depth of field during dose up work, even slight movement can cause your subject to be out of focus. A steady camera and lens are required for the best resufts. The use of a tripod, as well as a cable release to activate the camera's shutter, are recommended for all close up work.


Other Features
Non-rotating Front Barrel. The Kiron 1O5mm f2.8 lens is equipped with a non-rotating front barrel, which means that the front barrel of the lens does not rotate as the lens is focused. Position-sensitive filters, such as polarizers, and special effects filters, or filter masks retain their orientation as the lens is focused. Built-in Lens Hood. The Kiron 1O5mm f2.8 has a built-in, retractable lens hood which, when extended, will help to control stray light. All Kiron lenses feature full multicoating, with lens element edges that are hand-blackened to prevent lens flare, and assure high contrast and excellent color rendition.


General Information
Choose optical accessories, such as filters, with the same regard to quality you used when buying this lens. Low-quality accessories will compromise the high-quality results you expect from your Kiron lens.
Take normal care to protect your lens from fingerprints, dirt, sand, and water. Remove dust with a soft lens brush, or gentle puff of compressed air. Remove fingerprints or other marks with photographic lens tissue moistened with photographic lens cleaner. Never rub the lens with dry tissue or any other material, since this can scratch the coatings.
When your lens is being stored, keep it in a cool, dry place with front and rear caps attached.


NOTE: lf you live in a humid climate, it is important that your lens be stored with a small package of silica gel (such as the one supplied) at all times. This will help to prevent fungus, a result of high humidity, from forming in the lens.