Another 300f4 IS or 400f5.6 question...

[gschaps]

Am I the only person who thinks the Sigma 100-300 F/4 deserves a look?


Advantages : fixed f/4, zoom, fixed length, portability, price


Disadvantages: No IS (could happenin the future- Sigma's recently announced OS for several of their popular lenses)

[neuroanatomist]

Disadvantages: No IS (could happenin the future- Sigma's recently announced OS for several of their popular lenses)

How about AF issues? I will admit I've never used a Sigma lens - but I am somewhat concerned that many (most?) of Bryan's reviews of Sigma lenses, and many of the other reviews on the 'net using Sigma lenses with Canon bodies, mention issues with AF performance (and Sigma's notorious QC issues). Is this lens an exception? The photozone.de review is quite favorable, and it's specs look quite nice...

[gschaps]

I've read elsewhere AF with this lens requires "technique" -essentially pre-focusingfrequently even when not actually capturing images.


I plan to rent for ten days starting March 12th. I'll let you know around then.

[neuroanatomist]

I've read elsewhere AF with this lens requires "technique" -essentially pre-focusingfrequently even when not actually capturing images.

Pseudo-manual-sort-of-automatic focus?If autofocus isn't really<span>autofocus, what good is it?For myself, I'll pass...but let us know how it works out for you! Or how it will have already previously worked out for you in the future that has already passed into the past...

I plan to rent for ten days starting March 12th.

Where'd you get a Way-Back machine? Do you mean March 12th, 2011? That's planning pretty far in advance! []

[gschaps]

...what good is it?

We'll see. For me it's about the image. The rest is chit-chat.

I plan to rent for ten days starting March 12th.

Yes, of course. I meant April 12.

Where'd you get a Way-Back machine? Do you mean March 12th, 2011? That's planning pretty far in advance! [img]/emoticons/emotion-5.gif[/img]
<p style="CLEAR: both"]

<p style="CLEAR: both"]That's clever. I've got one for you: When's a doctor a real doctor? Answer: When he's practicing medicine. Cheers!

[neuroanatomist]

Yes, of course. I meant April 12.

Yes, I assumed so. []

I've got one for you: When's a doctor a real doctor? Answer: When he's practicing medicine.

LOL! In fact, I'm not a real doctor - I'm the fake kind, PhD, not MD. I am guilty of the occasional self-diagnosis, though... [:P]

[Brendan7]

Jayson, just for clarification, are you buying the 400 f/5.6 for sports? For birds it's a nice lens but for other uses it just tends to be a little slow. It's not that big of a deal but sometimes that f4 aperture can save you. Rent the lenses and find out


-brendan