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* When the built-in flash on the camera is used, adverse photographic phenom-
ena such as corner illumination fall-off or vignetting at the bottom part of the
image may be observed.This is due to the inherent illumination 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 image. It is strongly recommended to use
a suitable separate flash unit provided by the camera manufacturer for all flash
photography.
* to attach a lens where the maximum aperture is F3.5 or slower, (ex. High
power zoom lenses) is not recommended.
* When a teleconverter is attached, the focal length of the lens becomes longer
but the depth of field becomes shallower and it may be too difficult to shoot in
AF mode.Therefore, focusing in MF mode is recommended when a teleconvert-
er is used.
* Teleconverters are efficient tools to add focal length to the photographer's
telephoto lenses including zoom lenses, but cannot be recommended for use
with wide angle lenses or zoom lenses that cover wide-angle range focal
lengths.
* When using the lens in a telephoto focal range, it may be necessary to use a
tripod to avoid camera shake. Using high speed film (ISO 400 or faster) with a
fast shutter speed is also helpful to reduce the influence of camera shake.
* Do not forcibly turn the focusing ring when the lens in set in AF mode. Doing
so could damage the lens and/or camera.
* Certain camera models may indicate the maximum and minimum aperture
values of the lens as approximate numbers.This is inherent to the design if the
camera and not an indication of error.
* Please be aware that there is no infrared index line on any models listed in this
owner's manual. Therefore practically no black and white infrared film can be
used on this lens.
TO ENSURE LONG-TERM SATISFACTION
* 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.
* Clean the lens barrel with a silicon cloth. Do not use benzene or paint thinner
or other organic cleansers.