One more time: DA* 16-50mm vs. Tamron 17-50mm F2.8 (AF adjustment)

Unregistered User 8 · 12-26-2018, 10:30 PM

Originally posted by akptc

PJV, not at all, I am kind of glad to have suffered through it, I think I can now fine tune any healthy zoom quickly, with my eyes (almost) closed

Really good to hear that you found " a silver lining around that dark cloud."

**akptc** · 12-28-2018, 06:30 PM

Shipped off the 16-50 to Precision-Camera today, fingers crossed.

Trickortreat · 12-29-2018, 08:50 AM

Originally posted by akptc

Shipped off the 16-50 to Precision-Camera today, fingers crossed.

Hmm... why just the lens? A lens should be calibrated for your body. If they calibrate it for another it might be way off for your camera...

**akptc** · 12-29-2018, 03:03 PM

I didn't include the camera following most of the advice out there.. which generally says that if other lenses are easily calibrated with the camera, it's probably not the camera but the one bad lens that's at fault.

Paulo · 12-29-2018, 03:31 PM

Don't want to break your good mood but unfortunately if you send lens for calibration you need to do it together with the body. Different lenses work in different way with different bodies. Example - my da20-40 - with my K3II I can't calibrate it from menu as when set to 20mm it manifests BF. On 40mm the AF is perfectly precised. The same lens works perfectly on my KP. I had exactly the same case with da*16-50 (eventually replaced by mentioned da20-40 as much lighter piece of glass).

My other lenses does not exhibit any AF problems with either body.

**akptc** · 12-29-2018, 08:28 PM

Paulo, you are seriously bumming me out. I appreciate the comment though

I emailed the repair tech to let me know if he wants to me send the camera as well.

**akptc** · 01-16-2019, 08:47 PM

The 16-50 came back all shiny and new-like, with the tech's comment "seal ring replaced; a complete repair and return all functions to factory specs; complete cleaning (internal - external) and optical system". So I can't tell what was actually wrong with it but luckily it looks like the lens is now usable. I've been able to correct the AF to where I can no longer complain, I guess it's a keeper after all. The repair was a flat fee of $212.50, shipping included.

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12-26-2018, 10:30 PM	#16
Unregistered User 8 Closed Account Join Date: Mar 2015 Photos: Gallery Posts: 8,694	Originally posted by akptc PJV, not at all, I am kind of glad to have suffered through it, I think I can now fine tune any healthy zoom quickly, with my eyes (almost) closed Really good to hear that you found " a silver lining around that dark cloud."

12-28-2018, 06:30 PM	#17
akptc Site Supporter Join Date: Feb 2008 Location: USA Photos: Gallery Posts: 771 Original Poster	Shipped off the 16-50 to Precision-Camera today, fingers crossed.

12-29-2018, 08:50 AM	#18
Trickortreat Veteran Member Join Date: Dec 2013 Posts: 561	Originally posted by akptc Shipped off the 16-50 to Precision-Camera today, fingers crossed. Hmm... why just the lens? A lens should be calibrated for your body. If they calibrate it for another it might be way off for your camera...

12-29-2018, 03:03 PM	#19
akptc Site Supporter Join Date: Feb 2008 Location: USA Photos: Gallery Posts: 771 Original Poster	I didn't include the camera following most of the advice out there.. which generally says that if other lenses are easily calibrated with the camera, it's probably not the camera but the one bad lens that's at fault.

12-29-2018, 03:31 PM	#20
Paulo Forum Member Join Date: Jan 2012 Posts: 74	Don't want to break your good mood but unfortunately if you send lens for calibration you need to do it together with the body. Different lenses work in different way with different bodies. Example - my da20-40 - with my K3II I can't calibrate it from menu as when set to 20mm it manifests BF. On 40mm the AF is perfectly precised. The same lens works perfectly on my KP. I had exactly the same case with da*16-50 (eventually replaced by mentioned da20-40 as much lighter piece of glass). My other lenses does not exhibit any AF problems with either body.

12-29-2018, 08:28 PM	#21
akptc Site Supporter Join Date: Feb 2008 Location: USA Photos: Gallery Posts: 771 Original Poster	Paulo, you are seriously bumming me out. I appreciate the comment though I emailed the repair tech to let me know if he wants to me send the camera as well.

01-16-2019, 08:47 PM	#22
akptc Site Supporter Join Date: Feb 2008 Location: USA Photos: Gallery Posts: 771 Original Poster	The 16-50 came back all shiny and new-like, with the tech's comment "seal ring replaced; a complete repair and return all functions to factory specs; complete cleaning (internal - external) and optical system". So I can't tell what was actually wrong with it but luckily it looks like the lens is now usable. I've been able to correct the AF to where I can no longer complain, I guess it's a keeper after all. The repair was a flat fee of $212.50, shipping included.