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forward or behind the optimum point when shooting with auto focus under some
conditions.
-The image circle of Di-II lenses are designed to match the digital SLR cameras using the
image sensors equivalent to APS-C (approx. 15.5x23.2mm). Do not use Di-II lenses with
cameras using image sensors larger than APS-C. Using Di-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 the focusing ring may cause serious damage to
the lens mechanism.
-Certain 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 file can be used with these
lenses.
TO ENSURE LONG-TERM SATISFACTION
-Avoid touching the glass element surface. Use photographic lens cloths or blowers 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 silicone 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, dry place. When storing the lens in a lens
case, store it with commercially available drying agents 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 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.