Post your best bird shots!

here is 1 i took the other night .....rod
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A social heron I recently came across.


100-400 @ near 400, no crop.





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I've found that the 2x TC does do more "damage" to the image than is inherent in the lens being multiplied, but I've also found that (to my eye) it's worse for far-off objects than close ones; e.g. it is better for increasing magnification of close things than for increasing reach. Its negative impact can be lessened (and sometimes removed) at diffraction-inducing apertures, at which point you're fighting other sharpness loss than the lens system anyway. And at least the contrast and saturation loss from it are easily remediable on the computer.

Hey all... been working on applying to residency. Not had much time to shoot. From a trip to the waterfowl park last week.


http://farm5.static.flickr.com/4116/...df8c6780_b.jpg


Canon 50D+70-200 f4 L @ 200mm f4.5 1/1000 ISO-100


Cheerios,


Dave.

Quote:

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Originally Posted by JJphoto

.... just want to show how the 2X TC work with the 300mm 2.8, I think the IQ is still not too bad, but the AF is pretty slower, I couldn't track the turns in flight with it. Maybe it will fairly catch the bigger slower moving birds like egrets, but havn't tried it yet. thinking the version II super telephoto+TCs III will do the better job, but how better can it go?


7D ,600mm ,f5.6,1/800,-2/3 expo. comp., ISO 200

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JJ,


Both, Version II and Version III extenders will reduce AF Drive Speed in order to improve AF Performance. The 1.4X extenders reduce AF Drive Speed by 50% and the 2X extenders reduce AF Drive Speed by 75%. That's a pretty big hit for the 2x. I had no idea that it was that much myself.


Source (towards the bottom of the page): http://www.usa.canon.com/dlc/controller?act=GetArticleAct&amp;articleID=3508





Here is a comparison of Image Sharpness: 300mm f/2.8L IS with 2X converter @600mm f/5.6 vs. 600mm f/4L IS @ f/5.6


http://www.The-Digital-Picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=249&amp;Camera=453&amp;Sample=0&am p;FLI=2&amp;API=2&amp;LensComp=336&amp;CameraComp= 453&amp;SampleComp=0&amp;FLIComp=0&amp;APIComp=2





Rich

Quote:

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Originally Posted by czeano

Its negative impact can be lessened (and
sometimes removed) at diffraction-inducing apertures, at which point
you're fighting other sharpness loss than the lens system anyway

---

thank you czeano for pointing that out, never think about that before.

Quote:

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Originally Posted by Richard Lane

and the 2X extenders reduce AF Drive Speed by 75%

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thanks Rich for the information. 75% sounds really bad, but Canon claims that the performance of the TC III in real world won't be that bad if using with their version II lenses and 1D or 1Ds body, so we will see soon.

Quote:

---

Originally Posted by JJphoto

Quote:

---

Originally Posted by Richard Lane

and the 2X extenders reduce AF Drive Speed by 75%

---

thanks Rich for the information. 75% sounds really bad, but Canon claims that the performance of the TC III in real world won't be that bad if using with their version II lenses and 1D or 1Ds body, so we will see soon.

---

I think Canon is not being very clear on this. It seems their saying, that AF Tracking and AF Precision will be better with the New Super-Telephoto Lenses and New Version III Extenders, therefore AF Performance will be better, however it still sounds like the AF Drive Speed will be just as slow as it was before with the Version II Extenders. It sounds like the increased performance, is accomplished at the expense of speed. But, maybe your interpretation is better. Anyone else have a different interpretation?


Here is the link (bottom of page) : http://www.usa.canon.com/dlc/controller?act=GetArticleAct&amp;articleID=3508


Rich

Tricolred Heron


EOS 1D MKIII + 500mm f/4 + 1.4 TC , hand held, from my recent excursion to Florida





[img]/cfs-file.ashx/__key/CommunityServer.Components.UserFiles/00.00.00.32.28/343V0197.jpg[/img]

California Least Tern


40D and 400 f/5.6L, f/7.1, 1/1250, 250, manual exposure and handheldhttp://www.pscvn.org/members/308/9-7...9-52-24_AM.jpg


Thanks for viewing and commenting


Nate,

hi nate,


nice pict i see you have a lot of very good bird picts ......... rod