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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

 
Bave
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Aug 19, 2010 14:52 |  #46
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Is there any known difference between older 300 2.8 (non-IS) and more recently built ones (non-IS)? I have recently come across some that are 20 years old but still holding value.


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Neilyb
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Aug 19, 2010 15:07 |  #47

Bave wrote in post #10751742 (external link)
Is there any known difference between older 300 2.8 (non-IS) and more recently built ones (non-IS)? I have recently come across some that are 20 years old but still holding value.

Weight and lack of spare parts, which on a 20 year old lens could be an issue pretty quickly.


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minkynuts
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Aug 19, 2010 16:18 as a reply to  @ Neilyb's post |  #48

Sorry , I am so tetchy, but the thought of dream going up in smoke is killing me

Rob




  
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LightRules
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Aug 19, 2010 16:19 |  #49

minkynuts wrote in post #10736538 (external link)
At the moment I have a Sigma 120-300 2.8 I have just bought a canon 300 2.8 and have just tested them side by side and to me it seems the Canon image is larger than the sigma at 300mm but the sigma seems sharper.

Rob

Hi Rob, must be nice to have both the L prime and EX zoom in-hand :D Looks like you have a real nice 120-300 copy. But all things being equal, the L will outresolve the EX zoom. I mean in perfect conditions, with both lenses being in tip-top shape, the L is a sharper lens. I've shot many copies of both. This is not to say the EX zoom can't "wow", it can! But the L can really kick-ar$e :lol:

As for the focal length issue, the zoom is actually closer to 290mm at infinity focus while the prime (I think) is right around 300mm. But every lens will have this discrepancy, especially as you move toward MFD (min. focus distance, and even more so with zooms, and even more so with superzooms!). Always test at infinity focus, but even so, you'll still notice a difference (see for example the Sigma 50 and Canon 50, both at infinity, but just like you found, the Canon fills the frame a little more http://www.pbase.com …/image/10127747​8/original (external link) ).

Bottom line is if you shoot both at infinity focus, you'll see they are pretty close with the L still filling the frame a bit more because it's actually closer to 300mm than the Sigma zoom is.

BTW, you can check out my comparison of the Canon 300 f2.8 L IS USM versus the Sigma 300 f2.8 EX DG HSM here http://www.pbase.com/l​ightrules/300speed (external link) . Both were stellar copies.




  
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BenJohnson
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Aug 19, 2010 19:55 |  #50

I have the Sigma. Mine's real sharp! You are correct that it's not quite 300mm, even focused at infinity. At near MFD (like your test shots), it's even less.


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CyberDyneSystems
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Aug 19, 2010 20:44 |  #51

minkynuts wrote in post #10752333 (external link)
Sorry , I am so tetchy, but the thought of dream going up in smoke is killing me

Rob

Don;t let it bug you, go out and shoot with it in your element and see what happens then. Maybe it just doesn't like indoor lighting and floor cleaner!


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Camera ­ Nerd
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Aug 21, 2010 18:48 |  #52

eh i was also about to buy a used canon 300 2.8 non IS soon, but the sigma looks better, and i hate microadjusting, and find that lenses should work fine no matter what, especially when they cost 4300 dollars?? That said i have found on a camera like the 50d/7d where the sensor is smaller (1.6x crop) and has high mega pixels, it magnifies the imperfections with any lens


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amorrison
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Aug 21, 2010 23:11 |  #53

Could any of you canon 300 2.8 owners tell me the diameter of the lens hood? Thanks!!


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johnny_boy
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Aug 21, 2010 23:35 |  #54

Diameter at where? Lenshood size were 118mm (non-IS) and 120mm (IS), but I am not sure where that was measured at.




  
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amorrison
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Aug 21, 2010 23:43 |  #55

Thanks!! The rough outside diameter of the lens hood actually. Need it for packing considerations and planning. Couldn't find it anywhere on the web.


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FJ ­ LOVE
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Aug 21, 2010 23:48 |  #56

hood diameter for the IS version is 5 3/8" or 14 cm which ever you prefer :)


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amorrison
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Aug 22, 2010 20:06 as a reply to  @ FJ LOVE's post |  #57

Thanks - exactly what I needed!!


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johnny_boy
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Aug 23, 2010 17:23 |  #58

I measured it and the hood diameter (outside) for the Non-IS version is 5-5/16", which make sense considering the IS version noted above was 5 3/8". They are fractions a part.




  
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Jericobot
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Aug 23, 2010 18:50 |  #59

How is it that almost any lens I consider there's a thread enticing me even more to get it. Maybe it's a sign


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Anders ­ Östberg
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Aug 24, 2010 04:02 |  #60

Jericobot wrote in post #10774594 (external link)
How is it that almost any lens I consider there's a thread enticing me even more to get it. Maybe it's a sign

Just get one of each so you don't have to worry about it anymore. :)


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300mm 2.8
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