Tamron 70 200 F2,8

legendfoto79 · 03-29-2015, 04:39 AM

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

You Tube

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

Adam · 03-29-2015, 04:58 AM

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!

agsy · 03-29-2015, 05:06 AM

Could you post a video of your lens? That might be helpful so others can see and compare.

JinDesu · 03-29-2015, 07:27 AM

Are you saying you can't get your focus to rack back and forth continuously like in the video?

legendfoto79 · 03-29-2015, 09:42 AM

Originally posted by agsy

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

You Tube

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

Originally posted by JinDesu

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

JinDesu · 03-29-2015, 10:13 AM

your video is set as private, and you check the settings?

legendfoto79 · 03-29-2015, 10:17 AM

Originally posted by JinDesu

your video is set as private, and you check the settings?

try it now,sorry for that

You Tube

JinDesu · 03-29-2015, 10:22 AM

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....

legendfoto79 · 03-29-2015, 11:19 AM

Originally posted by JinDesu

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

Bengan · 04-07-2015, 10:19 PM

Originally posted by legendfoto79

try it now,sorry for that

www.youtube.com/watch?v=kUwpLvZm3hw&feature=youtu.be

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?

legendfoto79 · 04-09-2015, 02:50 AM

Originally posted by Bengan

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

Bengan · 04-09-2015, 04:50 AM

Originally posted by legendfoto79

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.

03-29-2015, 04:58 AM	#2
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,595	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! Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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03-29-2015, 05:06 AM	#3
agsy Veteran Member Join Date: Aug 2010 Location: Florida Photos: Gallery \| Albums Posts: 551	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
JinDesu Veteran Member Join Date: Jun 2011 Location: New York City Photos: Gallery Posts: 5,638	Are you saying you can't get your focus to rack back and forth continuously like in the video?

03-29-2015, 10:13 AM	#6
JinDesu Veteran Member Join Date: Jun 2011 Location: New York City Photos: Gallery Posts: 5,638	your video is set as private, and you check the settings?

03-29-2015, 10:22 AM	#8
JinDesu Veteran Member Join Date: Jun 2011 Location: New York City Photos: Gallery Posts: 5,638	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
legendfoto79 New Member Join Date: Sep 2014 Posts: 9 Original Poster	Originally posted by JinDesu 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
Bengan Pentaxian Join Date: Nov 2012 Location: Stockholm Photos: Gallery \| Albums Posts: 1,756	Originally posted by legendfoto79 try it now,sorry for that www.youtube.com/watch?v=kUwpLvZm3hw&feature=youtu.be 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
legendfoto79 New Member Join Date: Sep 2014 Posts: 9 Original Poster	Originally posted by Bengan 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
Bengan Pentaxian Join Date: Nov 2012 Location: Stockholm Photos: Gallery \| Albums Posts: 1,756	Originally posted by legendfoto79 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.