Kiron 105mm f2.8 Macro Lens User manual

Your new Kiron 105mm f2.8 Macro lens is
the product of advanced optical
design and precision mechanical
engineering. It’s also easy to use.
Simply take a few minutes to
familiarize yourself with the features and
general instructions. With proper use and
care, your Kiron 105mm f2.8 will provide
you with years of
outstanding service.
Features
1. 52mm filter threads
2. Reproduction ratio marks
3. Aperture index mark
4. Non-rotating front barrel
5. Built-in retractable lens hood
6. Focusing ring
7. Distance scales
8. Depth-of-field scale
9. Aperture ring
105mm f2.8 Macro Lens Instructions
Exposure Settings
All mounts — Use the same metering procedures you would use with your camera brand
lenses.
Note to Nikon owners — The Kiron 105mm f2.8 is fully compatible with all Nikon A1 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.
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 as shown in the photo, with all index marks
aligned. Turn the mounting ring clockwise to lock the lens onto your
camera.

2
Focusing
The Kiron 105mm 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 plane 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 until 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 ratio is not known in advance, focus until you have the desired image in
the viewfinder. Then look at the lens 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 plane 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. Please use the
depth of field tables provided on page 4, rather than simply reading from lens
barrel.
Camera and Lens Steadiness
Again, because of the small depth of field during close up work, even slight movement can
cause your subject to be out of focus. A steady camera and lens are required for the best results.
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. Your Kiron 105mm 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 105mm 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: If 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.
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 plane): 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.)
Weight and length may vary according to lens mount.
Specifications subject to change without notice.

4
Depth of Field Tables
Imperial
Metric
Original printed in Japan 6/84 1000045
This US v1.1 version by boggy - May 2013