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Old Sep 15, 2005, 12:12 PM   #1
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Got a nice used 120-300 recently and am extemely pleased with it's performance. Sharp and fast-focusing.

I've been wondering how it does with tele-extenders, so I set up my tripod and used the self timer. First shot at 300mm without a tele-extender. Second shot using my Canon 1.4X and Kinko 1.4X together. Third shot using a cheap Phoenix 2X extender.


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Old Sep 15, 2005, 12:13 PM   #2
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Here I cropped the 3 versions to the same smaller subject.


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Old Sep 15, 2005, 12:15 PM   #3
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Another comparison at full zoom


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Old Sep 15, 2005, 12:16 PM   #4
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Now a smaller section cropped from each.


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Old Sep 15, 2005, 12:17 PM   #5
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Here are couple of shots with the Sigma 120-300 and the 2 - 1.4 tele-extenders.


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Old Sep 15, 2005, 12:22 PM   #6
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It looks to me like I can get some pretty good 600mm shots at 5.6 with this lens. Certainly cheaper than a 600mm prime.

What do you think?




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Old Sep 15, 2005, 12:22 PM   #7
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I've found the Sigma 120-300 F2.8 lens to work very well with its matched 1.4x and 2x tc's as well.
I have the Sigma matched TC's, they are very similar to the Canon matched TC's.

I found trying it with a Tamron 2x sp TC the performance was mediocre.
Not quite sharp similar to your phonix results, but without the color shift.

Also seek out some of the samples NHL has posted using the 120-300 & 2x TC they are very impressive.

Peter
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Old Sep 15, 2005, 12:29 PM   #8
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Walter C wrote:
Quote:
It looks to me like I can get some pretty good 600mm shots at 5.6 with this lens. Certainly cheaper than a 600mm prime.

What do you think?
Me ??? - I use that combination all the time...

Handheld 1/750s @ f/8:


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Old Sep 15, 2005, 12:31 PM   #9
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Peter

After my experiment I'm wondering if I can get even better results at 2X compared with the "cheap" Phoenix 2X. It might well be worth the investment. I've heard that the Kinko Pro is pretty good, and less expensive than a Canon 2X II.

Any thoughts?

Walter
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Old Sep 15, 2005, 12:33 PM   #10
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NHL

Very nice bird in flight. What extender are you using? Any recommendations?

Walter
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