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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 17 Aug 2010 (Tuesday) 06:55
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300mm 2.8

 
cc10d
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Aug 24, 2010 19:36 |  #61

FWIW, I have a 300 2.8 L that I bought many years ago. Non IS of course. I liked the lens and found it to be very adequate. I was using film for years. I got a digital DSLR and found that I could detect a bit of softness, especially at 2.8. Still a good lens but my 100-400 L was as sharp in the f8 f11 range and much easier to carry around, but when the light was down out came the 300 2.8. Well I got a 7D a few months ago, and it was my first camera with microadjust. So I set it up, and carefully set the adjustment for the 300 and now I have A SUPER LENS in my 300 2.8. Same lens, it just wasn't set quite the same as my cameras were. (too bad I had not sent it in with my camera and got it adjusted years ago. OH Well) It was like buying a new lens when the microfucus of my camera was carefully done. I would suggest the set up should be done at at least 5 or more times the minimum focus distance.


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Joe300
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Aug 25, 2010 13:11 |  #62

OK, users of the 300 2.8..
what, when and where would you use this option...
"Autofocus stop buttons near the objective lens allow autofocus to be temporarily suspended".
the three black buttons around at the front of the lens..
Thanks,
Joe
btw, I have this lens and dont know how to use it....lmao...lol
and I am not sending it to anybody for testing....ha ha ha..


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minkynuts
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Aug 29, 2010 02:31 as a reply to  @ Joe300's post |  #63

Phew, after 4 days of using this 300 2.8 on a moto X event I can breath a sigh of relief, for although I could not detect any difference in image quality between that of my sigma 120-300mm 2.8 and this lens on static objects when it came to fast moving motorcycles coming towards me through the air the number of keepers
was far higher from the canon, even with a 1.4 converter the canon was better, so now the sigma will go

Rob




  
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Anders ­ Östberg
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Aug 29, 2010 03:37 |  #64

That's more or less my experience with several Sigma lenses ... great optical quality but not so great AF.


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hollis_f
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Aug 29, 2010 04:57 |  #65

Joe300 wrote in post #10786300 (external link)
OK, users of the 300 2.8..
what, when and where would you use this option...
"Autofocus stop buttons near the objective lens allow autofocus to be temporarily suspended".
the three black buttons around at the front of the lens..
Thanks,
Joe
btw, I have this lens and dont know how to use it....lmao...lol
and I am not sending it to anybody for testing....ha ha ha..

On some cameras these buttons are programmable. I have mine set to switch between AI Servo and One-Shot when pressed.


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Roy ­ C
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Aug 29, 2010 06:40 |  #66

hollis_f wrote in post #10809755 (external link)
On some cameras these buttons are programmable. I have mine set to switch between AI Servo and One-Shot when pressed.

Never knew this Frank - can you do it on the 7D? if so how?


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hollis_f
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Aug 29, 2010 12:46 |  #67

Roy C wrote in post #10809984 (external link)
Never knew this Frank - can you do it on the 7D? if so how?

Sure can. Page 218 in the manual. On the 7D you can set the AF-Stop buttons to half a dozen settings using C.Fn IV-1 and selecting the 'LENS' setting.


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Roy ­ C
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Aug 29, 2010 13:20 |  #68

hollis_f wrote in post #10811137 (external link)
Sure can. Page 218 in the manual. On the 7D you can set the AF-Stop buttons to half a dozen settings using C.Fn IV-1 and selecting the 'LENS' setting.

Thanks for that Frank - I thought I had explored all the C.Fn controls but obviously missed this one.


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Owl_79
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Mar 23, 2011 15:27 |  #69

Now I have made some studiotests for my 300 2.8 non-is compated to 200 2.8L II and 100-400L.
And I have to confirm that 300 2.8L is the softest one. 1
100-400L @ 330mm and f/5.6, 300 2.8L has same sharpness when stopped down to f/8.. At 5.6 100-400 is sharper (well, I've got super sharp copy of 100-400 anyway).
However, there seems to be very little difference in sharpness when using it wide open vs. f/5.6-f/8.
And my 200 2.8L II wins the IQ challenge here clearly.
I tested these lenses on 1D mk2, 40D and 5D classic.

I would like to see some full size samples using 300 2.8L non-is, just to see if my copy is bad or something...


Canon
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MGW172
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Mar 23, 2011 15:33 as a reply to  @ Owl_79's post |  #70

So are you saying you have to stop down the 300 to f/8 to get the same sharpness of the 100-400 @ 330mm and f/5.6?

If that is true, you either have the greatest 100-400 made or your 300 has some problems.


7D | 20D | Canon 10-22 | Canon 15-85 | Canon 70-300 L | Canon 100-400 L

  
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Owl_79
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Mar 23, 2011 16:04 |  #71

MGW172 wrote in post #12078157 (external link)
So are you saying you have to stop down the 300 to f/8 to get the same sharpness of the 100-400 @ 330mm and f/5.6?

If that is true, you either have the greatest 100-400 made or your 300 has some problems.

Yes, exactly.
Im wondering if my 300 has some problems... well yes it is very sharp lens indeed but my 100-400 is even sharper.

btw, here is full image (cropped a little bit and sharpened too).
1D mk2, ISO100 f/2.8, 1/2500s
http://tonskulus.kuvat​.fi …F300_28/MH6A948​3.JPG/full (external link)

Not the same bird but anyway, 100% crop from 100-400L @400mm f/5.6
http://tonskulus.kuvat​.fi …aiset/100400cro​p.jpg/full (external link)

So what do you think?


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Mk1Racer
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Mar 23, 2011 16:17 |  #72

With this talk of the older Sigma 120-300 f/2.8 being that good, I can only imagine that the new one will be even better. I passed on a 300 f/2.8 IS Mk I in anticipation of the new Sigma 120-300 f/2.8. I just wish Sigma would ship the damned thing already! :D


7D, BG-E7, BGE2x2 (both FS), 17-55 f/2.8 IS, 17-85 f/4-5.6 IS (FS), 50 f/1.8, 85 f/1.8, 70-200 f/2.8L IS Mk I, 70-300 f/4-5.6L, 550EX, Kenko Pro300 1.4xTC

  
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