Tamron B008 - Cautions When Using Tamron Lenses

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• The optical design for Oi II takes into consideration the various features of digital single reflex cameras. However, due to the configuration of
the digital single reflex cameras, even when the autofocus accuracy is within specifications, the focal point may be a little forward or behind
the optimum point when shooting with auto focus under some conditions.
• The image circles of Oi II lenses are designed to match the digital SLR cameras using the image sensors equivalent to APS-C (approx.
15.5
x
23.2mm). Do not use Oi II lenses with cameras using image sensors larger than APS-C. Using Oi II lenses with such cameras may
cause vignetting on the image.
• The Tamron lenses described here employ an internal focusing (IF) system. Because of the characteristics of this optical design, the angles
of view at distances other than infinity are wider than that of the lenses applying an ordinary focusing system.
• When the built-in flash on the camera is used, adverse photographic phenomena such as corner illumination fall-off or vignetting at the
bottom part of the image may be observed, especially in wide angle ranges. This is due to the inherent limitation of the coverage of the
built-in flash, and/or the relative position of the flash to the edge of the lens barrel which causes shadows on the image. It is strongly
recommended to use a suitable separate flash unit provided by the camera manufacturer for all flash photography.
For further details, please read the "built-in flash" article on the instruction manual of your camera.
• When set on AF mode, interfering with focusing ring may cause serious damage to the lens mechanism.
• Certain camera models may indicate the maximum and minimum aperture values of the lens in approximate numbers. This is inherent to
the design of the camera and not an indication of an error.
• Please be aware that there is no infrared index line on any models listed in this owner's manual, and therefore, practically, no black-and-
white infrared film can be used with these lenses.
• When using a special filter such as a PL filter, use low profile filters. The thick rim of a normal filter may cause vignetting.
• Avoid touching the glass element surface. Use a photographic lens cloth or blower to remove dust from the lens element surface. When not
using the lens, always place a lens cap on it for protection.
• Use a lens cleaning tissue or lint cloth with a drop of cleaning solution to remove fingerprints or dirt on the glass lens surface with a rotary
motion from the center to the edge.
• Use a silicon cloth to clean your lens barrel only.
• Mildew is an enemy of your lens. Clean the lens after shooting near water or in any humid place. Store your lens in a clean, cool and dry
place. When storing the lens in an lens case, store it with commercially available drying agent such as silicagel, and change the agent
occasionally. If you find mildew on your lens, consult an authorized repair shop or nearby photographic store.
• Do not touch the lens-camera interface contacts since dust, dirt and/or stains may cause a contact failure between the lens and camera.
• When using your equipment [camera(s) and lens(es)] in an environment where the temperature changes from one extreme to the other,
make sure to put your equipment temporarily in a case or a plastic bag for a length of time in order for the equipment to go through a
gradual temperature shift. This will reduce potential equipment trouble.