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Thread started 13 Dec 2013 (Friday) 23:44
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Tamron SP 150-600mm Di VC USD

 
pknight
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Feb 20, 2014 15:51 |  #1951

archer1960 wrote in post #16704213 (external link)
I have seen this exact same thing with other long 3rd-party lenses; the Sigma 50-500 (which I have rented multiple times) does it occasionally too, as does my Tamron 18-270.

Is your 18-270 the newer model with the PZD motor? I have the earlier version, and have never had this happen to me.


Digital EOS 7D Mark II Canon: EF 50mm f/1.8 II, EF 50mm f/2.5 Compact Macro, Life-Size Converter EF Tamron: SP 17-50mm f/2.8 DiII, 18-400mm f/3.5-6.3 DiII VC HLD, SP 150-600 f/5-6.3 Di VC USD G2, SP 70-200 f/2.8 Di VC USD, 10-24mm f/3.5-4.5 DiII VC HLD Sigma: 30mm f/1.4 DC Art Rokinon: 8mm f/3.5 AS IF UMC

  
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archer1960
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Feb 20, 2014 16:02 |  #1952

pknight wrote in post #16704740 (external link)
Is your 18-270 the newer model with the PZD motor? I have the earlier version, and have never had this happen to me.

No, it's the older version. It doesn't happen often, but when I heard that it was also happening with the 150-600, I just figured it was something in the way Tamron reverse engineered the Canon AF system. Just moving the camera to a different subject and back, or changing the zoom level will bring it back to life.


Gripped 7D, gripped, full-spectrum modfied T1i (500D), SX50HS, A2E film body, Tamzooka (150-600), Tamron 90mm/2.8 VC (ver 2), Tamron 18-270 VC, Canon FD 100 f/4.0 macro, Canon 24-105 f/4L,Canon EF 200 f/2.8LII, Canon 85 f/1.8, Tamron Adaptall 2 90mmf/2.5 Macro, Tokina 11-16, Canon EX-430 flash, Vivitar DF-383 flash, Astro-Tech AT6RC and Celestron NexStar 102 GT telescopes, various other semi-crappy manual lenses and stuff.

  
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Talley
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Feb 20, 2014 16:07 |  #1953

palmor wrote in post #16696985 (external link)
Canon EOS 5D Mark III
1/3200s f/8.0 at 600.0mm iso640
QUOTED IMAGE

Nice... I wish the BG was blue sky. Would make for a great print.


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My Gear Archive

  
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Snydremark
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Feb 20, 2014 16:23 |  #1954

archer1960 wrote in post #16704767 (external link)
No, it's the older version. It doesn't happen often, but when I heard that it was also happening with the 150-600, I just figured it was something in the way Tamron reverse engineered the Canon AF system. Just moving the camera to a different subject and back, or changing the zoom level will bring it back to life.

The difference is, at least for those of us with a lens exhibiting this behavior, it isn't "occasionally". It's 100% reproducible; and it's quite odd behavior.

My 18-270 won't do the same thing no matter how hard I try.

That said, when my camera guy gets back from his trip, I'm gonna have him send it to Tamron for a looksee; and see what they say.

EDIT: To be clear, it's when moving suddenly between a near or far target that's in focus, to a target in the opposite direction that is not. This is not failure to acquire and track something like a BiF nor AF failing period.


- Eric S.: My Birds/Wildlife (external link) (7D MkII/5D IV, Canon 10-22 f/3.5-4.5, Canon 24-105L f/4 IS, Canon 70-200L f/2.8 IS MkII, Canon 100-400L f/4.5-5.6 IS I/II)
"The easiest way to improve your photos is to adjust the loose nut between the shutter release and the ground."

  
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archer1960
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Feb 20, 2014 17:15 |  #1955

Snydremark wrote in post #16704822 (external link)
The difference is, at least for those of us with a lens exhibiting this behavior, it isn't "occasionally". It's 100% reproducible; and it's quite odd behavior.

My 18-270 won't do the same thing no matter how hard I try.

That said, when my camera guy gets back from his trip, I'm gonna have him send it to Tamron for a looksee; and see what they say.

EDIT: To be clear, it's when moving suddenly between a near or far target that's in focus, to a target in the opposite direction that is not. This is not failure to acquire and track something like a BiF nor AF failing period.

Ok. I can't reproduce it reliably on my 18-270, but it's always at max zoom when it does happen. I've got a tamzooka on the way, hopefully in the next two weeks or so, and I'll play with it when it gets here.


Gripped 7D, gripped, full-spectrum modfied T1i (500D), SX50HS, A2E film body, Tamzooka (150-600), Tamron 90mm/2.8 VC (ver 2), Tamron 18-270 VC, Canon FD 100 f/4.0 macro, Canon 24-105 f/4L,Canon EF 200 f/2.8LII, Canon 85 f/1.8, Tamron Adaptall 2 90mmf/2.5 Macro, Tokina 11-16, Canon EX-430 flash, Vivitar DF-383 flash, Astro-Tech AT6RC and Celestron NexStar 102 GT telescopes, various other semi-crappy manual lenses and stuff.

  
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Scrumhalf
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Feb 20, 2014 17:17 as a reply to  @ post 16610726 |  #1956

Doesn't seem to happen to this guy, whatever the reason is. And he is using a 7D.

http://www.youtube.com​/watch?v=I6BXbjSywY4 (external link)


Sam
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If I don't get the shots I want with the gear I have, the only optics I need to examine is the mirror on the bathroom wall. The root cause will be there.

  
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Snydremark
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Feb 20, 2014 17:30 |  #1957

Scrumhalf wrote in post #16704937 (external link)
Doesn't seem to happen to this guy, whatever the reason is. And he is using a 7D.

http://www.youtube.com​/watch?v=I6BXbjSywY4 (external link)

He's not using AI Servo. He's using One Shot and moving the focus point in between shots; totally different scenario. I've never seen One Shot fail to go grab focus yet.


- Eric S.: My Birds/Wildlife (external link) (7D MkII/5D IV, Canon 10-22 f/3.5-4.5, Canon 24-105L f/4 IS, Canon 70-200L f/2.8 IS MkII, Canon 100-400L f/4.5-5.6 IS I/II)
"The easiest way to improve your photos is to adjust the loose nut between the shutter release and the ground."

  
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Scrumhalf
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Feb 20, 2014 17:32 as a reply to  @ post 16610726 |  #1958

Ah, I missed that. Thanks for clarifying, Eric!


Sam
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If I don't get the shots I want with the gear I have, the only optics I need to examine is the mirror on the bathroom wall. The root cause will be there.

  
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Mike55
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Feb 20, 2014 17:34 |  #1959

Grizz wrote in post #16704733 (external link)
Hawk with dinner.

QUOTED IMAGE
IMAGE LINK: http://flic.kr/p/ki1jJ​x  (external link)


Wow!


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Peter2516
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Feb 20, 2014 19:06 as a reply to  @ post 16610726 |  #1960

Great shot of the RTH with dinner Craig.


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BamPhoto
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Feb 20, 2014 19:28 as a reply to  @ post 16610726 |  #1961

Considering the shots I've seen here, the price, no resale on the forum and the fact they are backordered, I think they have done well.


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JasonMK
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Feb 20, 2014 20:08 |  #1962

Wow, just when I was content with my lens collection a 600mm pops up @ this price...


-JasonMK on Flickr (external link)
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Kickflipkid687
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Feb 20, 2014 20:11 as a reply to  @ post 16610726 |  #1963

Yeah, cool shot!


My Flickr page - https://www.flickr.com​/photos/86957042@N07/ (external link)

  
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Snydremark
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Feb 20, 2014 20:16 as a reply to  @ post 16610726 |  #1964

Absolutely agree there, Randy. Just to further the discussion: (be sure to click through to see better quality)

7D + 100-400; 400mm @ f/8:

IMAGE: https://farm6.staticflickr.com/5487/12666332714_caa9a3a864_b.jpg
IMAGE LINK: http://www.flickr.com …s/snydremark/12​666332714/  (external link)
Reifel Sandhills_400-0673 (external link) by Guideon72 (external link), on Flickr

7D + Tamron 150-600; 400mm @ f/6.3:
IMAGE: https://farm4.staticflickr.com/3669/12665877265_e622fee5e3_b.jpg
IMAGE LINK: http://www.flickr.com …s/snydremark/12​665877265/  (external link)
Reifel SHCrane-0395 (external link) by Guideon72 (external link), on Flickr

Plus a whole post on my recent trip to a local reserve (where the cranes were taken):
https://photography-on-the.net …/showthread.php​?t=1361905

This lens performs remarkably well, especially for the price range and reach.

- Eric S.: My Birds/Wildlife (external link) (7D MkII/5D IV, Canon 10-22 f/3.5-4.5, Canon 24-105L f/4 IS, Canon 70-200L f/2.8 IS MkII, Canon 100-400L f/4.5-5.6 IS I/II)
"The easiest way to improve your photos is to adjust the loose nut between the shutter release and the ground."

  
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Snydremark
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Feb 20, 2014 20:18 |  #1965

A group from this last weekend with the 7D + Tamron:
https://photography-on-the.net …/showthread.php​?t=1361905


- Eric S.: My Birds/Wildlife (external link) (7D MkII/5D IV, Canon 10-22 f/3.5-4.5, Canon 24-105L f/4 IS, Canon 70-200L f/2.8 IS MkII, Canon 100-400L f/4.5-5.6 IS I/II)
"The easiest way to improve your photos is to adjust the loose nut between the shutter release and the ground."

  
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Tamron SP 150-600mm Di VC USD
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