Hi Jaako,
My EF 28-135 IS USM and EF 100-400 IS USM make two sets of noises when power
is first applied to the lens. I presume this is the result of the internal
lens microprocessor resetting itself, and self-testing the image stabilizer
mechanism and resetting the aperture blades.
Cheers
Julian
That's odd! I just tried that with my 1n and BP-E1. Used the 28-135, took
the battery rack out of the BP, put it back in, got the same noise you
describe. It didn't matter that the IS was off, or even if the camera was
off. This last is really strange. Put on a 50mm f1.8, nothing. 100 f2,
no
I handled my 1V and 28-135 IS lately due lack of battery power, the indicator said 1/2
power was left in the body. I decided to check which kind of batteries I had in my
PB-E2. The camera was switched off. When I took BM-E2 out of PB-E2, the LCD display on
top of the body went clear as I suppos
