newbie question.

[DannyLewis]

thanks

 

[DannyLewis]

with the lense extended does the tube gather dust or say a drop of water and take it back into the lense when it is brought back in from zoom?

 

[SCraig]

All zoom lenses will get some dust inside over time due to the "Breathing" when the tube is zoomed. So far I've never had it cause a problem.

Water, I don't know. Mine don't get exposed to water.

 

[table1349]

I have the Sigma 150-500 and dollar for dollar it's going to be tough to beat.

I have been wondering about that one. My concern is night sports and that f/6.3... which lead me to the Canon options... I am torn between buying one or trying to use a converter. I think a converter coupled with my 70-200 would be better for me than the 6.3... but I just don't know. Could you move closer so I could try yours out, Please?.

The Sigma is far too slow. That's why I own a 300mm f2.8 and 400mm f2.8. I wouldn't waste my time with a TC either. The 2X is marginal in IQ and very slow for night sports. The 1.4 will give reasonably good IQ but still pretty slow for under the lights.

 

[MLeeK]

Our home field lights are really pretty good. I can get away with shooting at 4.5 to 5.6. Other fields? Not so much. My home field is my biggest concern. I think the 400 would be a great addition, but seeing how I have to shoot both near and far I'd then have to have 2 bodies. Which is fine-used to do that. EXCEPT... now I am working with a 5d2 as my second body. That thing is a nightmare in low light for focus add to that it's slow for sports... YACK!
I also think that if I buy the 1.4 I am only out a few hundred bucks and I'll probably use it a little here and there anyway. I shoot sports, but not high end. At my age? I REALLY doubt I'd go high end.

 

[ScubaDude]

Here's a comparison between the two. Go for the Canon. At the long end, the IQ is vastly superior. And it takes Canon's extenders well if you need more reach.

 

[DannyLewis]

thx ScubaDude now I know what I am getting and thank's to all the other's.....

 

[LShooter]

Rent a few. Try a few. THEN buy a few.

 

[joel28]

I shoot in the mountains of New Mexico and wouldn't use anything less than 400mm glass. Usually I am using 600mm or 800mm glass. It is never good to be too close to bears, mountain lions and such.

Can you share with us some of these images?

 

[TheBiles]

Remember, the 100-400 is a push-pull zoom. Personally, that drives me crazy compared to a standard zoom ring. I'm also very satisfied with my 2x TC + 70-200, which gives me a 140-400 f/5.6 IS, but that's quite a bit more expensive than either zoom mentioned.