Extender help

[terry manier]

MY QUESTION. I want an extender to shoot marsh birds (can't

walk in the marsh). I want to use it on my 70-200 1:2.8 L IS USM

Should I get the 1.4X or the 2X? Will I loose any picture quality

with either?

 

 

Thanks Terry

[marshall]

Is 1.4 x 200 long enough? If not, get the 2x. But yes, you sacrifice something for the amount of magnification. Mostly, you sacrifice speed (1 stop for the 1.4 and 2 stops for the 2x), and you do lose a little quality with each step. Good luck.

[barefoot]

Hi Terry,

<p>

Bob Atkins wrote a very good article for PN on Tele-Converters. Click <a href="http://www.photo.net/learn/optics/tc2/index.html" >here.</a>

<p>

Hope this helps

<p>

Stuart

[jim_doty]

Terry:

 

You will lose a little quality with the 1.4X and a little more with the 2X. The 70-200 f/2.8

is so good that even with a slight quality loss, I think the 1.4X is still quite good and

useable on the 70-200. The 2X is a bit of a disappointment to me, but some folks find it

quite useable. I think the 1.4X is well worth the money on the 70-200 and the 2X is

questionable. I would recommend you get the 1.4X.

 

I should add that I use the 2X on the 100 macro for more magnification, and I like it for

that.

 

Happy Shooting!

 

Jim

[frank uhlig]

The main question here is: how large do you want the birds to be on the film/print? Or, the other way around: how far are you from them?

 

If you can fill your frame with them at 1.4x extension, use that one; if not, use 2x extension ... or stack. {Ultimately you will need those extenders on a 600 mm lens anyway, so save a few thousands for that 600/f4 lens now!}

 

As the extender article says: you need to get the largest image first, then you can crop and enlarge. not the other way around, however nice the 1.4x extended image is.

[yakim_peled1]

<p>I think <a href="http://photonotes.org/articles/beginner-faq/lenses.html#tc">this</a> is a good summary. I'd personally try to stay away from 2X.<p>

 

 

<p>Happy shooting,<br>

Yakim.</p>