I'm a bit late to this and no help I'm afraid Graham but thought I'd mention that the first one I bought had this problem.Is anyone else’s 150-600 sometimes a little reluctant to AF? Sometimes I have to give the manual focus ring a nudge before much happens and then it seems fine.
It seemed to be an issue with my camera. Tried it on another and it worked fine. Stuck it back on mine and it’s been fine ever since. WeirdI'm a bit late to this and no help I'm afraid Graham but thought I'd mention that the first one I bought had this problem.
Fortunately it was under a month old, had it replaced and had no issues since
Have you managed to get the problem sorted?
Doubtful that the tc would be at fault here. There’s no moving parts. I’d expect it to be camera related.Come to this thread looking for any users that are using the lens with the teleconverter TC1401. Here is my issue I have two canon 80D bodies and when I use the teleconverter on either body is lowish light the lens just hunts and never locks focus. I am aware that light plays an important part with trying to use a lens at F8 in low light but my fellow togger and I were out yesterday he with same lens combo and TC but with a Nikon D300 and his lens body combo performed so much better than my lens combo constantly locking on focus on the same subjects (Avalon Marshes bird photography)
Focus without the TC fitted was exactly the same, focus on bird lens locked focus take the shot and no issue
Is it possible the TC could be faulty?
Last year I sent the lens back under warranty as the lens had severe back focus the Focal software could not correct
Since I have had the lens back Focal set the adjust at -4 and +4 at wide and tele ends I am at a loss for how poor the lens performs with the TC attached
Any thoughts would be appreciated
Doubtful that the tc would be at fault here. There’s no moving parts. I’d expect it to be camera related.
Had this combo on my D500, still hunted when the light levels fell a bit.
Stopped using the tc altogether.
I've not had all that much use yet, if you look through the last couple of pages of this thread anything I have posted has been with that combo. It locked onto the young dear jumping through the long/busy grass just fine. I've took plenty of practice shots of seagulls flying etc, but I'm new to bird in flight photography so I'm no expert. It hunts a while trying to go from near to far and vice-versa but all these long lenses do that, it's better to focus on something roughly the same distance and then lock onto subject. Low light? Well it's not really a good option for low light with it's aperture range but that's nothing to do with adapting it. For the money I am very happy with it's performance and really enjoying using it.Hi NewBeetle,
what is the AF speed lock on like ! ?
dos it hunt at all in low light ?