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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 13 Jun 2010 (Sunday) 15:59
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50D + Tamron 17-50mm > blurry results

 
mdw
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Jun 13, 2010 15:59 |  #1

At f/2.8 I'm getting hazy or blurred results... I thought this lens was sharp wide open...!? :confused:

f/2.8

IMAGE: http://img231.imageshack.us/img231/1223/calc1.jpg

f/2.8 100% crop
IMAGE: http://img822.imageshack.us/img822/5697/calc2.jpg

f/5.6
IMAGE: http://img252.imageshack.us/img252/3995/calc3.jpg

f/5.6 100% crop
IMAGE: http://img252.imageshack.us/img252/6135/calc4.jpg

Roger
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Canon 50D l Canon 70-200mm f/4L l 50mm f/1.8 l Canon 100mm f/2.8 l Tamron 17-50mm f/2.8 XR DI II LD

  
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St1ll
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Jun 13, 2010 16:24 |  #2

Something's wrong. My copy was tack sharp wide open!
Try to manual focus..


Flickr (external link) Canon 5D - Canon EF 17-40 f/4L - Canon EF 135 f/2 L - Σ 50 f/1.4 EX

  
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Erik_L
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Jun 13, 2010 16:37 |  #3

correct, try manually focusing - it may be front/back focusing and the DoF is too shallow to get the buttons in focus. use live view and see what you come up with. If that's the issue, adjust the MFA.

Mine is inconsistent, it's sharp wide open for somethings, but not others.


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MGiddings ­ Photography
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Jun 13, 2010 16:41 |  #4

My 17-50 2.8 is also sharp at 2.8 but I do micro adjust it. How did you take that shot. Was the camera on the surface or were you holding it, if you were what was the shutter speed?


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mdw
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Jun 13, 2010 16:43 |  #5

Manual focus seems to do the job. But still...

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Roger
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Canon 50D l Canon 70-200mm f/4L l 50mm f/1.8 l Canon 100mm f/2.8 l Tamron 17-50mm f/2.8 XR DI II LD

  
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mdw
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Jun 13, 2010 16:44 |  #6

I'm sorry, thought the exif data was in the photo.
Shutterspeed's 1/200sec. / ISO 100


Roger
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Canon 50D l Canon 70-200mm f/4L l 50mm f/1.8 l Canon 100mm f/2.8 l Tamron 17-50mm f/2.8 XR DI II LD

  
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Yaamon
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Jun 13, 2010 17:21 as a reply to  @ mdw's post |  #7

I had to send my tamron for focus calibration and on the first service they said realign lens to specs and recalibrate.

Had to send it in 2 more times so that the lens would focus at all focal length and distance properly.

Here is a example at 50mm and F2.8.

IMAGE: http://farm5.static.flickr.com/4055/4693881158_de052e0b6c_b.jpg

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Bobster
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Jun 13, 2010 18:18 |  #8

micro adjust the lens? i had to micro adjust my 70-200 and 28-75 (waiting for my 17-50 to be fixed)


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HoosierJoe
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Jun 14, 2010 07:12 |  #9

I had to remove my $50 B+W filter to get sharp results from that lens. Not knocking filters but that one was definitely a problem for me.



Ain't nothin but a thing.

  
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St1ll
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Jun 14, 2010 07:33 |  #10

HoosierJoe wrote in post #10358205 (external link)
I had to remove my $50 B+W filter to get sharp results from that lens. Not knocking filters but that one was definitely a problem for me.

that's a good point.
Are you using a filter, mdw? If so, remove it and try again...i got some very bad results too with a cheap uv filter!


Flickr (external link) Canon 5D - Canon EF 17-40 f/4L - Canon EF 135 f/2 L - Σ 50 f/1.4 EX

  
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HoosierJoe
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Jun 14, 2010 16:10 |  #11

St1ll wrote in post #10358273 (external link)
that's a good point.
Are you using a filter, mdw? If so, remove it and try again...i got some very bad results too with a cheap uv filter!

I didn't think $50 for a filter was cheap! But this one definitely had an issue.



Ain't nothin but a thing.

  
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St1ll
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Jun 15, 2010 11:56 |  #12

HoosierJoe wrote in post #10361245 (external link)
I didn't think $50 for a filter was cheap! But this one definitely had an issue.

Indeed mine was not a 50 bucks filter :) I was talking about mine!


Flickr (external link) Canon 5D - Canon EF 17-40 f/4L - Canon EF 135 f/2 L - Σ 50 f/1.4 EX

  
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garycoleman
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Jun 15, 2010 13:21 |  #13

Tamaron 17-50 is not that sharp when wide open. My Canon 17-55 is tack sharp wide open and my Tamaron 17-50 is sort of fuzzy wide open


Canon 5D MKIII | Canon 60D | 24-70mm f/2.8L II | 17-55mm f/2.8 IS | 70-200mm f/2.8L IS | 580EX II

  
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watt100
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Jun 15, 2010 14:02 |  #14

garycoleman wrote in post #10366904 (external link)
Tamaron 17-50 is not that sharp when wide open. My Canon 17-55 is tack sharp wide open and my Tamaron 17-50 is sort of fuzzy wide open


my Tamron 17-50 2.8 (non-vc) is extremely sharp wide open,
perhaps it's sharper than Canon !

http://www.the-digital-picture.com …&FLI=0&API=0&Le​nsComp=398 (external link)




  
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St1ll
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Jun 16, 2010 10:18 |  #15

garycoleman wrote in post #10366904 (external link)
Tamaron 17-50 is not that sharp when wide open. My Canon 17-55 is tack sharp wide open and my Tamaron 17-50 is sort of fuzzy wide open

my copy was crazy sharp also wide open, actually :rolleyes:


Flickr (external link) Canon 5D - Canon EF 17-40 f/4L - Canon EF 135 f/2 L - Σ 50 f/1.4 EX

  
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50D + Tamron 17-50mm > blurry results
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