I just tested it inside and it seems to work fine. What I noticed is I locked the focus with that switch at the back. It's normally only the focus points it locks so I wouldn't know if that had something to do with it or if it is like the focus freeze and will just happen for some reason.
D7100 and Tam 150-600 problem
- Thread starter mikew_RIP
- Start date
I just tested it inside and it seems to work fine. What I noticed is I locked the focus with that switch at the back. It's normally only the focus points it locks so I wouldn't know if that had something to do with it or if it is like the focus freeze and will just happen for some reason.
JohnFrench
Senior Member
Good to see Ram Island Ledge Light.
Today the Tam froze up on me twice.
I was shooting fast for about an hour and all was fine. Then I wanted to shoot some slow and switched VR on and focus died. The second time was about half an hour after that. This time VR was switched on.
I suspect the VR might have something to do with the focus freeze.
I was shooting fast for about an hour and all was fine. Then I wanted to shoot some slow and switched VR on and focus died. The second time was about half an hour after that. This time VR was switched on.
I suspect the VR might have something to do with the focus freeze.
I did wonder about that but have not heard anything yet.
Have you contacted Tamron about this? I seem to recall there was some update they have done to that specific lens concerning this problem. It would be worth a try because if it can just die on you like that, you won't want to carry it around...
I'm waiting until Mike's Tamron returned and I'm sure they didn't mess it up.
It's strange but now I am aware of the problem, it seems to occur more and more. Maybe it is weather related.I'm waiting until Mike's Tamron returned and I'm sure they didn't mess it up.
Thats not a problem,if they get it right its my lens,if they mess it up its there lens
I'm having more and more issues with the Tam. Today while birding it has a serious case of bad focus. When I tried clouds, it just would not focus on them. Too many of my shots turned out to be close but alas when it came to focusing.
I took my 35mm out to check if it wasn't the cam having problems but it focused perfectly on everything I pointed the lens at.
I'm going to have a chat about it in the shop on Thursday. I don't mind an occasional focus freeze but focusing wrong is something else entirely.
I took my 35mm out to check if it wasn't the cam having problems but it focused perfectly on everything I pointed the lens at.
I'm going to have a chat about it in the shop on Thursday. I don't mind an occasional focus freeze but focusing wrong is something else entirely.
I went through my shots to see if I could spot a theme. Alas I had already deleted the out of focus shots. But what I do noticed is that I have very, very few high shutter shots that have the focus indicator and that were shot with VR left enabled. I got plenty of slow shots that have VR on.
I try to remember to disable VR when shooting fast but quite often I forget. I'll have to test this to see if VR is the cause of my focus issues. If it starts correcting during high speed bursts, it could mess up my focus.
I try to remember to disable VR when shooting fast but quite often I forget. I'll have to test this to see if VR is the cause of my focus issues. If it starts correcting during high speed bursts, it could mess up my focus.
It's possible that's why it didn't focus on the clouds but the bad focus is something else I guess. I see the focus indicator in View but that area is blurred. That can happen when I shoot at slow shutters and move but at 1/1000s I need to be the Flash to cause motion blur.
Been through all the variations and with mine there is no pattern except VR on but this is with slow and fast shutter speeds.
Where you getting focus hunting or just no reaction when you press the shutter button,focus hunting in many situations i may have put up with but not nothing happening at all.
nikonpup
Senior Member
lens was focus hunting, focus arrows where switching back and forth.
I'm testing it when the weather clears up. I have days it does focus perfect and I got very sharp shots, other days I delete most afterwards. If it is because I forget to disable VR, it should reveal that quickly. If that's the case, I'll glue the button shut.
I did some testing and although I was suspicious the VR might be the problem, I am still amazed by the results.
First let me say that the slower than 1/400s shots have not been taken with care and with two pits attached to my belt. Most suffered motion blur because of that. All shots are also taken in bursts. The same as I shoot flight.
I've also been generous in what I considered in focus or in focus enough. I uploaded the shots, checked them at 1:1, marked the unsharp and then in View checked which are taken with VR and at what speeds.
VR OFF:
108 shots taken.
23 < 1/400s. Unsharp: 20.
85 = 1/1000s. Unsharp: 18.
VR ON:
109 shots taken.
13 < 1/400s. Unsharp: 12.
96 = 1/1000s. Unsharp: 53.
Those numbers show exactly where my problem is situated. If I forget to disable VR at fast shots, it ruins most during bursts.
Before I forget; within 10 minutes after enabling VR, I had a focus freeze.
First let me say that the slower than 1/400s shots have not been taken with care and with two pits attached to my belt. Most suffered motion blur because of that. All shots are also taken in bursts. The same as I shoot flight.
I've also been generous in what I considered in focus or in focus enough. I uploaded the shots, checked them at 1:1, marked the unsharp and then in View checked which are taken with VR and at what speeds.
VR OFF:
108 shots taken.
23 < 1/400s. Unsharp: 20.
85 = 1/1000s. Unsharp: 18.
VR ON:
109 shots taken.
13 < 1/400s. Unsharp: 12.
96 = 1/1000s. Unsharp: 53.
Those numbers show exactly where my problem is situated. If I forget to disable VR at fast shots, it ruins most during bursts.
Before I forget; within 10 minutes after enabling VR, I had a focus freeze.
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The slow shots I ignore since the dogs ruined most but the 1/1000th have less to do with my ability since that is identical with or without VR.
If VR was beneficial at high shutter, I should have more sharp shots than without. If it did nothing, the numbers should be fairly identical. I could be competent or completely incompetent with the long lens and that would still be true.
It has nothing to do with the freeze but it explains why I had that inconsistent focus. If I forget to disable VR, my shots suffer.
Freeze is related to VR too since, in my case, it only occurred when enabled.
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