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03-29-2015, 04:39 AM   #1
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Tamron 70 200 F2,8

Hello

Help me out here guys I have an K-3 L Prestige Edition and i have bought an used Tamron 70-200 F2,8 in mint condition,but i have an problem if you take an look to this link


I cannot do this on my camera with this tamron is there any setting I have to do on my camera,our do the lens maybe need some kind of service it seems that the lens are jamming and not run smooth like the the same lens in the link

So if you have any tips about this please share them with me

03-29-2015, 04:58 AM   #2
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If the lens isn't focusing smoothly, then it obviously wasn't in mint condition

I've had the screwdrive AF mechanism fail on one of my FA Limiteds due to a manufacturing defect in the driveshaft. The lens could not be focused manually beyond a certain point, and the AF would often spin freely, make a grinding noise, or fail to engage for a while. Perhaps your lens is suffering from something similar. Hopefully you can still return it!

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03-29-2015, 05:06 AM   #3
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Could you post a video of your lens? That might be helpful so others can see and compare.
03-29-2015, 07:27 AM   #4
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Are you saying you can't get your focus to rack back and forth continuously like in the video?

03-29-2015, 09:42 AM   #5
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Video

QuoteOriginally posted by agsy Quote
Could you post a video of your lens? That might be helpful so others can see and compare.
Here is the link I upload it on youtube,It don't matter if you have auto focus install or manual focus,you got the same effect



---------- Post added 03-29-15 at 09:42 AM ----------

QuoteOriginally posted by JinDesu Quote
Are you saying you can't get your focus to rack back and forth continuously like in the video?
Yes that is what Im saying
03-29-2015, 10:13 AM   #6
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your video is set as private, and you check the settings?
03-29-2015, 10:17 AM   #7
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QuoteOriginally posted by JinDesu Quote
your video is set as private, and you check the settings?
try it now,sorry for that

03-29-2015, 10:22 AM   #8
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Yeah that's definitely not normal. Mine doesn't do that. With the focus ring in M mode, it focuses slower but it doesn't stop like that. Definitely need to get the lens returned or something....

03-29-2015, 11:19 AM   #9
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QuoteOriginally posted by JinDesu Quote
Yeah that's definitely not normal. Mine doesn't do that. With the focus ring in M mode, it focuses slower but it doesn't stop like that. Definitely need to get the lens returned or something....
I will send it to Tamron service to geting this fix
04-07-2015, 10:19 PM   #10
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QuoteOriginally posted by legendfoto79 Quote
In the You Tube clip you move the focus ring towards the camera wich will set it to manual focus and then you try to use autofocus. Why?
04-09-2015, 02:50 AM   #11
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QuoteOriginally posted by Bengan Quote
In the You Tube clip you move the focus ring towards the camera wich will set it to manual focus and then you try to use autofocus. Why?
I have the same effect on both MF and AF,

If you put the focus ring to MF then the only way is to adjusted it by hand,but in this case it doesn't matter if you have MF or AF because I get the same result on both but

Also if you target something and using AF,and then change the direction in the same area as you point to first time nothing happen the leans will no refocus
04-09-2015, 04:50 AM   #12
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QuoteOriginally posted by legendfoto79 Quote
I have the same effect on both MF and AF,

If you put the focus ring to MF then the only way is to adjusted it by hand,but in this case it doesn't matter if you have MF or AF because I get the same result on both but

Also if you target something and using AF,and then change the direction in the same area as you point to first time nothing happen the leans will no refocus
I suppose you know that you will have to set both the lens and the camera to manual i order for it to work properly. Same thing, if you are holding the trigger half way down and want the focus to follow you should use AF.C, right.
I read somewhere that it is possible to damage the screw drive if you focus manualy without setting the camera to manual.
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