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Auto Lens Retract feature on 750D

This feature doesn't seem to work on my 750D. The lens attached to the camera while trying this feature is 18-55 IS STM. Please help me with this.

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banehawi Plus
14 1.8k 3890 Canada
11 Oct 2017 7:29PM
The camera doesnt have an auto lens retract feature. Can you provide more info, - maybe I misunderstand? The leans attached to the camera, and you zoom it in and out manually with the zoom ring.
Fma7 3 823 United Kingdom
11 Oct 2017 7:44PM
Looks like it does


11 Oct 2017 7:55PM
I don't have a 750D but I do have the EF 40/2.8 lens mentioned in the quoted manual.

Note the manual says gear-driven STM lens - the 40/2.8 is gear driven, I don't know about the 18-55mm. Not all STM lenses are gear driven, therefore it may be not all STM lenses can use this feature.
banehawi Plus
14 1.8k 3890 Canada
11 Oct 2017 9:16PM
The lens doesnt support it, thanks for the updated information.

The EF 40mm STM, - does have a stepper motor but is not gear driven as far as I can tell, looking at the one I own. As far as I can see on the Canon site, - the M lenses have this feature?
11 Oct 2017 9:31PM
There are two variants of STM - the "main" one uses a motor-driven leadscrew to directly move a group of lens elements. The frame to hold the group and the leadscrew takes up a lot of space, though, and on some lenses there just isn't the room, so a much more compact geared mechanism drives the assembly instead. In such case, the lens is "gear-driven STM" whereas plain STM is really "leadscrew STM". The 40/2.8 is tiny and does not have the room for the leadscrew setup, so it is a gear-driven variant. The 50/1.8 STM is the same, as is the EF-S 24mm.

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