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Canon 300 2.8 stops focusing

smrooker
Apprentice

I have a used Canon 300 2.8 non is that I bought used. Tack sharp, great lens. But if you change from horizontal to vertical, it shuts off. in the repair shop now, they can't figure it out. any thoughts?

3 REPLIES 3

ebiggs1
Legend
Legend

Yes, send it to CPS.

EB
EOS 1DX and 1D Mk IV and less lenses then before!

trulandphoto
Enthusiast

Sounds like it might be a fault with the AF/MF switch or the wiring so that it is switching without you moving the tab. Canon service would be your best bet.

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TCampbell
Elite
Elite

Ouch... I happen to own one of these and can vouch for the fact that it is _not_ supposed to shut off AF when you rotate it.

 

If the shop can't figure it out... I'm wondering who you sent it to.  Is this at a Canon repair facility??

 

 

Tim Campbell
5D III, 5D IV, 60Da
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