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I'm worried about something, my 24-70 L of the first version is already 12 years old, everything is fine with it. But what can you expect from him? And most importantly, how to solve such problems?

Hi. Use the 184 page instructions.

You need a Canon Tripod Mount Ring B (W)

If we talk about automatic focus, then the Sigma Art fix line is worthy of attention. The rest is very far behind Canon on EF (tamrons, sigma).

You can use adapters for EF-1,2,3 bayonets, but everywhere it will be manual optics.:1) M42 - a huge amount of inexpensive manual optics (easy to find).2) Pentacon Six - medium format lenses (easy enough to find)3) Early Hasselblad mount - - medium f...