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Canon zoom "70-200 2.8L is" focusing infinity problem

crwdns2934249:0crwdne2934249:0:

Hi, I have a Canon zoom "70-200 2.8L is"
It has a problem in focusing at infinity.
If the lens is set to 10m and the subject at 500m the focus (autofocus) stops at about 20-30 m
If the lens is set beyond infinity the focus (autofocus) works.
I tried to adjust the trimmers present in the lens (noting the prime references) but I was unable to solve the problem.
I suspect that a slot (the last one) of the autofocus encoder is dirty or something similar.
=== Aggiorna (01/13/25) ===
+
@zephosk Help Me :-D

crwdns2866306:0crwdne2866306:0:

Canon EF 70-200mm F2.8 L IS USM

crwdns2915684:0crwdne2915684:0:

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crwdns2934245:0crwdne2934245:0 Emanuele Meynet

crwdns2947189:0crwdne2947189:0:

Canon zoom "70-200 2.8L is" focusing infinity problem

crwdns2934249:0crwdne2934249:0:

Hi, I have a Canon zoom "70-200 2.8L is"
It has a problem in focusing at infinity.
If the lens is set to 10m and the subject at 500m the focus (autofocus) stops at about 20-30 m
If the lens is set beyond infinity the focus (autofocus) works.
I tried to adjust the trimmers present in the lens (noting the prime references) but I was unable to solve the problem.
I suspect that a slot (the last one) of the autofocus encoder is dirty or something similar.
+
+=== Aggiorna (01/13/25) ===
+@zephosk Help Me :-D

crwdns2866306:0crwdne2866306:0:

Canon EF 70-200mm F2.8 L IS USM

crwdns2915684:0crwdne2915684:0:

open

crwdns2934241:0crwdne2934241:0 Emanuele Meynet

crwdns2947189:0crwdne2947189:0:

Canon zoom "70-200 2.8L is" focusing infinity problem

crwdns2934249:0crwdne2934249:0:

Hi, I have a Canon zoom "70-200 2.8L is"

It has a problem in focusing at infinity.

If the lens is set to 10m and the subject at 500m the focus (autofocus) stops at about 20-30 m

If the lens is set beyond infinity the focus (autofocus) works.

I tried to adjust the trimmers present in the lens (noting the prime references) but I was unable to solve the problem.

I suspect that a slot (the last one) of the autofocus encoder is dirty or something similar.

crwdns2866306:0crwdne2866306:0:

Canon EF 70-200mm F2.8 L IS USM

crwdns2915684:0crwdne2915684:0:

open