10. Circular aperture for producing beautiful softfocus images. 11. Can be used with EF 1.4 x III / EF 2 x III extenders . 12. Attachment slot provided for wire-type security lock, located under the cover for the orientation locking knob.
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 1.4 x III or EF 2 x III . Depending on the camera there may be image shake, such as after releasing the shutter. However, this does not affect shooting.
When shooting with EOS A2/A2E/5 fitted with either the EF300mm f/2.8L IS II USM or EF400mm f/2.8L IS II USM, use -0.5 step exposure compensation when using extender EF1.4 x II, and use -1 step exposure when using extender EF 2 x AF is possible with extender EF1.4 x II/ III or EF 2 x II/ III .
Extension Tubes (sold separately) Camera-to-Subject Distance (mm) Magnification Near Far Near Far EF 12 II 1380 3397 0.19 x 0.06 x EF 25 II 1092 1716 0.26 x 0.14 x
If the batteries do fail, the EF can still be used manually from 1/ 2 - 1/1000 sec. 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.
