Canon 70 200 manual focus problem

 · f AF problem. PM. Have a canon f non IS lens that is having AF issues. My other zoom lens ( f) is not having any issues paired with my 5D Mk III body, so pretty sure it is an issue with the The problem is with the AF on closer subjects (approx. within 25 ft) - on more distant subjects, the AF is tack sharp, but when I try to focus on a Estimated Reading Time: 4 mins.  · I just pulled out my /4 IS and / IS and checked them. My f4 has pretty close to 1/4 turn (90 degrees of rotation) to go from closest focus to infinity. The f has a little more, maybe 1/3 turn ( degrees) rotation for the same.  · The canon f4 IS lens is an excellent lens. However, recenlty there is a known problem with the quality of the focus module. The problem exists even for new purchased copy. The lens has no problem to focus when the lens is in horizontal position. However, if your try to focus in the vertical position, there may be a problem.

The Canon EFmm f/4L IS USM lens is a lightweight, compact, high-performance telephoto Manual focusing is available after the subject comes into focus in autofocus mode (ONE SHOT AF). 5. A truly round aperture hole results in a nicer mount, but this will not cause any problems. If the rubber ring becomes worn, it is replaceable by a. Re: EF L USM manual focus failure. AM. It is worth repair but the fL version is sure tempting and now you have a reason. Call Canon 1 () and ask about service. EOS 1DX and 1D Mk IV and several lenses! In this video you can see how to repair Canon lens EF mm f/4 L USM - AF not working - Click (Show More) Thanks for the support and thanks for watchi.

Canon f/4 Manual focus not working. Help! Had this lens for years. Recently the focus ring stopped working. It spins very easily. If I tug back on. There appears to be a common issue with the mm f/4 L IS and focus slip. The most common report seems to be slipping when not in the horizontal position, although there could be other issues. Please google " f/4l focus slip" to find more information. Focus is jammed up on my lens, any ideas?.