Luminous Landscape Forum

Equipment & Techniques => Cameras, Lenses and Shooting gear => Topic started by: Gregory on June 24, 2006, 06:51:16 am

Title: Canon IS Mode 2. 'at right angles' means?
Post by: Gregory on June 24, 2006, 06:51:16 am
the manual for my new Canon EF 70-300 DO IS says:

MODE 2 corrects vibrations and shaking only in the direction at right angles to the camera's panning movement.

my immediate interpretation was in simple terms of vertical or horizontal movement but...
does it actually mean that the image will be stabilised at right angles to the panning movement regardless of the angle? eg, if I'm panning slightly downward from left to right at an angle of say 110°, will the lense stabilise movement in the 20°/200° plane?

(I photograph a lot of birds, some of them in flight.)

btw, the IS is remarkable.
Title: Canon IS Mode 2. 'at right angles' means?
Post by: michael on June 24, 2006, 08:57:39 am
Your assumption is essenaitally correct. There are two stabilization mechanisms, each working at right angles to the other. In mode two one of them is turned off.

The lens senses in which direction the movement is taking place. That's why it's a god idea to "lead" the subecjt a bit before shooting, such as a bird in flight. This gives the lens a moment to detect direction and lock on.

Michael
Title: Canon IS Mode 2. 'at right angles' means?
Post by: Phuong on June 25, 2006, 12:57:59 pm
what do you mean by "lead the subject" michael?
Title: Canon IS Mode 2. 'at right angles' means?
Post by: michael on June 25, 2006, 02:04:09 pm
Partially press the shutter release for a few moments so that the lens has the opportunity to sense the direction of motion and to stabilize on the proper axis prior to exposure.

Michael
Title: Canon IS Mode 2. 'at right angles' means?
Post by: Phuong on June 26, 2006, 12:21:49 am
thanks Michael.
i use the