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Canon 50mm 1.8 STM stays extended

magyi98
Apprentice

Hi !

 

I bought a canon EF 50mm f/1.8 STM lens for my DSLR Camera.

I saw today that the internal house is out, It stays extended when powered off.

 

I pushed It back manually (with my hand). I know, I can push back It with the focus ring but I did iI with hands. Does it do any damage in the mechanism or the AF ? 

 

Thanks!

1 ACCEPTED SOLUTION

MikeSowsun
Authority

I have pushed the front element in by hand on my EF-S 24mm, EF 40mm, and EF 50mm STM lenses many times, and it does no damage.

 

Which camera do you have? Not all cameras have the "Retract lens on power off" function. I believe this function was added to all Canon cameras starting around 2015. ( M3, M5, M6, M50, T6i/750D, T7i/800D, T6s/760D, 77D, 5Ds, 5D Mk IV, 7D Mk II, 80D, 90D, etc)

 

If you have one of the newer cameras, you probably just need to enable the Custom Function. It is normally enabled by default, but you may have disabled it. 

 

This ONLY works with "STM" lenses (EF-S 24mm STM, EF 40mm STM , EF 50mm STM, etc.) that have "focus by wire", and a front element that extends during focus.

 

[video]

 

_001.jpg

Mike Sowsun
80D, 5D Mk III

View solution in original post

4 REPLIES 4

MikeSowsun
Authority

I have pushed the front element in by hand on my EF-S 24mm, EF 40mm, and EF 50mm STM lenses many times, and it does no damage.

 

Which camera do you have? Not all cameras have the "Retract lens on power off" function. I believe this function was added to all Canon cameras starting around 2015. ( M3, M5, M6, M50, T6i/750D, T7i/800D, T6s/760D, 77D, 5Ds, 5D Mk IV, 7D Mk II, 80D, 90D, etc)

 

If you have one of the newer cameras, you probably just need to enable the Custom Function. It is normally enabled by default, but you may have disabled it. 

 

This ONLY works with "STM" lenses (EF-S 24mm STM, EF 40mm STM , EF 50mm STM, etc.) that have "focus by wire", and a front element that extends during focus.

 

[video]

 

_001.jpg

Mike Sowsun
80D, 5D Mk III

magyi98
Apprentice
Dear @MikeSowsun !
Thanks your feedback. I use D2000 camera.
So this "hand push action" did not cause damage to the lens? I did it 3 times and accidentally pushing it back by hand. I'm glad I didn't ruin it. 🙂

3 times is no problem at all. 

Mike Sowsun
80D, 5D Mk III

Mike,

Excellent info!

~Rick
Bay Area - CA
~6D2(v1.1.1) ~Many Lenses ~DxO PhotoLab Elite ~Windows10 Pro ~EVGA RTX 3080Ti FTW3 Ultra ~ImageClass MF644Cdw ~Pixel6 ~R5C On Order
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