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c18913
Aug-31-2006, 10:47 AM
I just got a new Canon 70-300/F4-5.6 IS USM for my 20d and the instruction booklet doesn't do a very good job of explaining the two IS modes.

Can anyone give me a quick explanation of which shooting situations are appropriate for Mode 1 & Mode 2?

Thanks in advance & have a great day.
--Christy
Jeffro
Aug-31-2006, 01:21 PM
I just got a new Canon 70-300/F4-5.6 IS USM for my 20d and the instruction booklet doesn't do a very good job of explaining the two IS modes.

Can anyone give me a quick explanation of which shooting situations are appropriate for Mode 1 & Mode 2?

Thanks in advance & have a great day.
--Christy

I have a 70-200L f2.8 IS, and I'm sure your modes are the same.

Mode 1 is for up and down and side to side movement.

Mode 2 is for up and down movement.

Mode 1 is for handholding at slower shutter speeds, when you want to reduce shake in all directions.

Mode 2 is for handholding, or even on a monopod, when you are panning with a subject at slower shutter speeds, and want to reduce the up and down shake only.

Does that help ya any? :dunno :D
Tee Why
Aug-31-2006, 06:22 PM
Mode 1 is for handholding.
Mode 2 is for Panning.
ian408
Sep-02-2006, 07:17 AM
Mode 1 is for handholding.
Mode 2 is for Panning.

To add to this, turn the IS off when using a tripod.
ultravox
Sep-03-2006, 11:05 PM
To add to this, turn the IS off when using a tripod.
Sorry Sir but in the manual it states that it will power down by itself (on tripod).
Jeffro
Sep-04-2006, 07:23 AM
Sorry Sir but in the manual it states that it will power down by itself (on tripod).

The original version of IS didn't turn itself off when on a tripod, now it does.
ian408
Sep-04-2006, 07:42 AM
Sorry Sir but in the manual it states that it will power down by itself (on tripod).

Whether the IS system powers it down or not is irrelevant. When using any lens
with IS, you need to turn it off when using it on a tripod.
Jeffro
Sep-04-2006, 09:45 AM
Whether the IS system powers it down or not is irrelevant. When using any lens
with IS, you need to turn it off when using it on a tripod.

You may want to add your reasoning, such as the lens will still use power if the IS mode is on, while on a tripod, even though it will deactivate and not hinder your shot. Battery life is said to be reduced by 20% when using IS.

Need to, have to, want to, it's your choice really.
ian408
Sep-04-2006, 01:00 PM
You may want to add your reasoning, such as the lens will still use power if the IS mode is on, while on a tripod, even though it will deactivate and not hinder your shot. Battery life is said to be reduced by 20% when using IS.

Need to, have to, want to, it's your choice really.

Power consumpition is one factor. But the other more significant factor is
that the IS system doesn't work well unless the lens is moving.

While the 70-300EF may shut the IS off, most other lenses do not.
Tee Why
Sep-05-2006, 08:35 PM
the first generation of IS like on the 28-135IS has to be turned off when on a tripod. I believe all the other lenses are second and third generation IS systems that do not require turning off on a tripod.
ultravox
Sep-05-2006, 09:36 PM
I have the last version (3 stops - the faulty one :rofl,you hnow, the one with portrait issue) and even with tripod and IS on I can't see any degradation in pics.