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UPDATE
The forum will be moving to a new domain in the near future (canonrumorsforum.com). I have turned off "read-only", but I will only leave the two forum nodes you see active for the time being. I don't know at this time how quickly the change will happen, but that will move at a good pace I am sure. ------------------------------------------------------------
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I'll be shipping my EF 100-400mm f/4.0-5.6L IS USM off for repair work this week. It's not been under warranty for several years now.
When I hit my AF (rear button focus), I can see the center point being pulled down as I look thru the viewfinder, it seems to click and keeps trying to capture focus but fails. Then I'll push the front shutter button half way for metering or sometimes just click it and take an image and try to focus again and then it will catch again and focus. When it does focus, it's spot on. Trouble is, it is only focusing about 1 in 5 images now...
Additionally, I can see part of the inside of the barrel moving when I look in it from the 77mm end. It will sway back and forth, whatever direction I move the barrel!
So it's going in, I can't stand it but I need it fixed. Is it wise to join CPS before I send it in or not? If so, what level does anyone recommend joining at?
All the best,
Ken
When I hit my AF (rear button focus), I can see the center point being pulled down as I look thru the viewfinder, it seems to click and keeps trying to capture focus but fails. Then I'll push the front shutter button half way for metering or sometimes just click it and take an image and try to focus again and then it will catch again and focus. When it does focus, it's spot on. Trouble is, it is only focusing about 1 in 5 images now...
Additionally, I can see part of the inside of the barrel moving when I look in it from the 77mm end. It will sway back and forth, whatever direction I move the barrel!
So it's going in, I can't stand it but I need it fixed. Is it wise to join CPS before I send it in or not? If so, what level does anyone recommend joining at?
All the best,
Ken