EOS T6- Focusing issues (not related to MF/AF button)

[aroryborealis]

Hi Everyone-  I have a t6 which is is not locking onto things in AF when I use my viewfinder.  it will zoom in and out past focus and then just not take the shot.  It will focus and take the shot in live view mode so I know the camera can focus, lock and take a shot.  I have no issues taking a pic in MF.  This happens when the camera is in any mode including auto mode, and lighting is not a factor (indoor, outdoor, bright or low light its still an issue).  I reset the camera settings already.  I am concerned that given that it focuses OK in live mode, could this mean that the mirror our AF points are dirty?   

[jrhoffman75]

If you put the original lens back on does the problem re-appear?

I am having trouble thinking of a lens related issue that would occur with one focusing mode and not another.

[aroryborealis]

Hi-  yes, the problem comes back with the original lens back on.  Its just AF.. sometimes it works fine and a minute later it wont focus in and take the shot (it does try to focus in and out but doesnt stop in focus and shoiot).  

[jrhoffman75]

Are using manual focus in LiveView or letting camera focus. 

[aroryborealis]

the issue is only in AF wwith viewfinder.  If I go to AF with LiveView it will focus fine.  

[aroryborealis]

OK Everyone-  Appreciate your help.  Ive found the issue... the lens is bad.  when looking down the lens I see a stuck/brocken  aperture diaphram .... they arent bouncing around inside but there are 3-4 that are stuck partially closed.  guess the lens is shot.  Its just a kit lens so not worth trying to fix.  what a shame. 

[aroryborealis]