Tips on Using the Image Stabilizer The Image Stabilizer also operates when the lens is used with extension tube EF12 II or EF 25 II or the extender EF 1.4x III or EF 2x III . Depending on the camera there may be image shake, such as after releasing the shutter. However, this does not affect shooting.
The Variable Aperture AE control will not operate, but you can manually adjust the aperture ring of the lens. A basic exposure guide to follow for bright sunlight (with distinct shadows) is to make a fraction representing the shutter speed needed at f / 16 by putting a "one" over the film's ASA rating. With a film of ASA 100, use 1/100 sec.
