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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

 
jantzer
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Aug 17, 2010 15:12 |  #16

If it's a 7d maybe it just needs some usm to sharpen up.


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johnny_boy
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Aug 17, 2010 16:13 |  #17

minkynuts wrote in post #10739138 (external link)
The canon with microadjustment, I think I can see a difference , but that may be wishful thinking

Rob

I see the difference. Slightly sharper than before, but the size of the bottle changed, so it might be further away than before.




  
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minkynuts
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Aug 17, 2010 16:47 as a reply to  @ johnny_boy's post |  #18

Now I am disappointed,I have waited a long time for a canon 300 2.8 only to find that the image quality
is not that much better at all,in fact I can earn more with the flexibility of the zoom than with the quality of the Canon.

Rob




  
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KayakPhotos
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Aug 17, 2010 16:52 |  #19

minkynuts wrote in post #10739907 (external link)
Now I am disappointed,I have waited a long time for a canon 300 2.8 only to find that the image quality
is not that much better at all,in fact I can earn more with the flexibility of the zoom than with the quality of the Canon.

Rob

I guess my question would be: Why buy the 300 if you have a 120-300 that is an excellent performer and you need the versatility? If you need the IS, I understand.


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tkbslc
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Aug 17, 2010 16:59 |  #20

Lens focal lengths are measured at infinity and can vary widely near MFD, especially with zooms. I would suspect if you did an outdoor test at 300 feet, the FOV would be near identical. This looks like it is near MFD.


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minkynuts
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Aug 17, 2010 17:07 as a reply to  @ tkbslc's post |  #21

In the next couple of days, I am going to test the focus speed of the two lenses, if I do not notice any difference then the canon lens will be back on the market, I have to be able to justify the large price difference.

Rob




  
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KennyG
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Aug 17, 2010 17:11 |  #22

The 300 2.8IS is the fastest focussing Canon lens and of course has weather sealing. But you seem to have a touch of buyer remorse, that sinking feeling in the wallet.


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minkynuts
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Aug 17, 2010 17:17 as a reply to  @ KennyG's post |  #23

The strange thing Kenny is that I bought it from near you , Wetherby in fact , last week
Rob




  
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bobbyz
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Aug 17, 2010 18:33 |  #24

If canon is not sharper and isn't much better AF wise in (AI servo mode in particular) then you got a bad canon 300mm f2.8, period.


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jft158
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Aug 17, 2010 19:03 |  #25

try using it real world where bottles move and you will see a difference

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70d, 1Ds Mark II, Canon 300m 2.8L ,Canon 50 1.8, Canon 70-200 2.8L non-IS, Canon 100-400L, Canon 17-4 ,Canon 135L, Canon 85 1.8,Rokina 14mm fisheye, Canon 24-105L, Pancake 40mm smugmug site (external link)

  
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20DNewbie
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Aug 17, 2010 19:13 |  #26

jft158 wrote in post #10740574 (external link)
try using it real world where bottles move and you will see a difference

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mitsu13gman
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Aug 18, 2010 06:12 as a reply to  @ 20DNewbie's post |  #27

Just to confirm, you are referring to the Canon EF 300 2.8L IS, correct? Not the older non-IS variant or an older lens?

The reason I ask is that my 300 2.8 is by far the sharpest lens I've used, and is generally regarded as one of the sharpest lenses available for the EF mount.

I really can't explain the images you are getting from this lens - with mine, the only sharpening I do is creative - even wide-open it's critically sharp on my 1D3 straight out of Bridge/Camera Raw.

If it's not completely blowing the Sigma away, either return it for another copy or get it to Canon for repair - it should NOT look like the images you are getting so far.


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CyberDyneSystems
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Aug 18, 2010 09:48 |  #28

minkynuts wrote in post #10739907 (external link)
Now I am disappointed,I have waited a long time for a canon 300 2.8 only to find that the image quality
is not that much better at all,in fact I can earn more with the flexibility of the zoom than with the quality of the Canon.

Rob

I wouldn't be, there are many that have felt the Sigma zoom you have is just as good, prime like in it's image quality, however many others seem to end up shooting copies that just aren't that good. IMHO, it really looks like you have one of the winning copies,. and I would be stoked to have a zoom that good!!!


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CyberDyneSystems
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Aug 18, 2010 09:50 |  #29

mitsu13gman wrote in post #10742938 (external link)
Just to confirm, you are referring to the Canon EF 300 2.8L IS, correct? Not the older non-IS variant or an older lens?...

For some reason we can't get the OP to tell us this :lol:

I'm running on the notion that it's the Non IS, but Kenny and others are assuming the IS.
IMHO, this makes a huge difference,. if it's the older lens,. to me this just means the SIGMA he has rocks,. AF speeds would be much closer,. etc..

...if it's the newer IS lens, I agree, there could be a problem with the lens, and or maybe he just needs to shoot it more.


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minkynuts
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Aug 18, 2010 13:05 as a reply to  @ CyberDyneSystems's post |  #30

Why would I withhold the fact it a non IS lens. In outside sport the IS to me is a hindrance, due to the slight delay. And as more than one person will tell you, there is not much difference between the IS and non IS quality in daylight. My friend who works for one of the national papers has the IS version, I will get him to lend it to me, I will take 7 photos with my Non IS lens and one with the IS lens using the same camera, focal length, aperture and on a tripod, if you can pick out the IS lens photo 3 times out of ten I will give you $100
if you do not you give me $100, if what you say about the IS lens it should be a cakewalk for you.
Rob




  
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300mm 2.8
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