Align the index mark on the hood with the corresponding index mark (O or the top of the index line of the distance scale) on the lens. Press the hood lightly onto the hood attaching bayonet ring (Fig. 9, No. 1) and then rotate it clockwise to secure (Fig. 9, No. 2). The lens hood will be securely held as the mark “TAMRON O” comes to the top (Fig. 10, No. 3). When attaching the lens hood, hold the focusing and zoom control rings so that they are not rotated unintentionally.
*Pay particular attention to align the hood attaching indices when using zoom lenses including wise-angle (i.e. 35mm or wider) settings. Improper attachment of a hood for wide-angle zoom lens may cause large shadowed areas in your pictures.
•Stowing Lens Hood
a.Detach and reverse lens hood then, align alignment mark of lens hood (TAMRON O) with alignment mark of lens. (Fig. 11,a).
b.Press lens hood evenly onto bayonet ring and turn hood clockwise until stop. When stopped, alignment mark of hood will be placed at top.
DEPTH OF FIELD
•With a camera equipped with a depth-of-field-preview button or a aperture-stop-
down mechanism, the depth-of-field can be directly observed on the viewfinder screen of your camera. For the operational details, read the instruction manual of your camera.
*In case you need a depth-of-field table of your lens, please ask for it at a Tamron distributor or a service station.
*You can also download a depth-of-field table of your interest from our website. Tamron URL: http://www.tamron.co.jp
INFRARED PHOTOGRAPHY
Please be aware that there is no infrared index line on any models listed on this owner’s manual, and therefore, practically no black-and-white infrared film can be used with these lenses.
PRECAUTIONS IN SHOOTING
•The Tamron lenses, AP AF28-75mm (Model A09) employ an internal focusing (IF) system to achieve a remarkable minimum photographing distances of 0.33 meter (1.08 feet). 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 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.
