PRECAUTIONS IN SHOOTING
-The optical design for Di-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 auto focus 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.
-When photographing near the minimum focusing distance it is advisable to shoot at
higher f-numbers to obtain sharper image quality.
-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) emply 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.
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