-The image circles of Di-II lenses are designed to match the digital SLR camera using the
image sensors equivalent to APS-C (approx. 15.5 x 23.2mm). 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.
-(B001) 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.
-The use of teleconverters is not recommended due to the optical performance of the lens.
-When using the lens in the telephoto focal range, please be careful with the camera
shake. Effective way to avoid the camera shake is using an ISO setting of higher numbers.
Using a tripod is also effective.
-When set on AF mode, interfering with the focusing ting may cause serious damage to
the lens mechanism.
-Certain camera models may indicate the maximum and minimum aperture values of the
lens appropriate numbers. This is inherent to the design of the camera and not an
indication of error.
-When using a special filter such as a PL filter, use low profile filters. The thick rim of a
normal filter may cause vignetting.
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.
