Lens suggestion

rjg5 wrote in post #6957348
Question on the Sigma - is there any conflict between the Canon camera "reading and managing" the Sigma lens? Would IQ and AF be better than a 70-200 w/1.4x? (I shoot my girls soccer games)

No conflict that I have experienced. AF was extremely quick with the 1-3 EX I used. TBH, it is probably the fastest AF'ing Sigma lens I've used to date. It's at least as quick as the 300 f4 IS, if not quicker.

As for IQ, it is better than the 7-2 f2.8 IS + 1.4x. Both in sharpness and especially contrast. If you stop the L lens down a bit, then it catches up, but not with both at f4 (280 and 300). You can shoot the Sigma 100-300 at 300mm f4 all day and get superb clarity and contrast.

rjg5 wrote in post #6957348
Question on the Sigma - is there any conflict between the Canon camera "reading and managing" the Sigma lens? Would IQ and AF be better than a 70-200 w/1.4x? (I shoot my girls soccer games)

No conflict and the answer is yes, the Sigma will have better IQ than a 70-200 w1.4x TC.

jr_senator wrote in post #6953908
Joke, right?

+1 agree totally!

To be clear about the IQ of these two lenses, the 300 f/4 IS's IQ is better, but not by much. I consider the 300 f/4 IS to be the more versatile lens which is why I own it. It's lighter, a little sharper and has IS which comes in very handy. But for field sports, I'll take the 100-300 f/4. Dynamite lens.

LightRules wrote in post #6957400
No conflict that I have experienced. AF was extremely quick with the 1-3 EX I used. TBH, it is probably the fastest AF'ing Sigma lens I've used to date. It's at least as quick as the 300 f4 IS, if not quicker.

As for IQ, it is better than the 7-2 f2.8 IS + 1.4x. Both in sharpness and especially contrast. If you stop the L lens down a bit, then it catches up, but not with both at f4 (280 and 300). You can shoot the Sigma 100-300 at 300mm f4 all day and get superb clarity and contrast.

I agree, It's a gem of a lens !

twoshadows wrote in post #6956436
....but the Sigma is a zoom and doesn't need as much cropping, therefore negating any sharpness advantage the Canon may have.

twoshadows wrote in post #6957397
With the prime things are often too close or are further away than optimum and need to be cropped.

OK, the discussion is about the Sigma 100-300mm and Canon 300mm, correct? Now, going back to your first post, you say the Sigma doesn't need the cropping the Canon does. As I see it, if the Canon needs cropping (the shot being taken at 300mm), how in heavens name would the Sigma, same shot not also need cropping?

jr_senator wrote in post #6958239
OK, the discussion is about the Sigma 100-300mm and Canon 300mm, correct? Now, going back to your first post, you say the Sigma doesn't need the cropping the Canon does. As I see it, if the Canon needs cropping (the shot being taken at 300mm), how in heavens name would the Sigma, same shot not also need cropping?

Maybe you should go back and reread what he wrote.

It's no joke about the IQ of the Sigma 100-300mm. It's one reason I bought it over the prime.

You should try some of these lens you comment about.

jr_senator wrote in post #6958239
OK, the discussion is about the Sigma 100-300mm and Canon 300mm, correct? Now, going back to your first post, you say the Sigma doesn't need the cropping the Canon does. As I see it, if the Canon needs cropping (the shot being taken at 300mm), how in heavens name would the Sigma, same shot not also need cropping?

You're being purposefully obtuse.

I'm done with you.

CountryBoy wrote in post #6959195
Maybe you should go back and reread what he wrote.

I took your advice and reread what was said. It says just what I thought it did. Let me ask you ...now, first lets keep in mind that the lenses in question are the 100-300mm Sigma and the 300mm Canon. Now lets take a look at what was said, "...the Sigma is a zoom and doesn't need as much cropping, therefore negating any sharpness advantage the Canon may have.". Now, we set each lens the same distance from the subject and frame the same subject. Since one lens is a fixed 300mm, and using the same format and distance, the 100-300mm will have to be set at 300mm, correct? Same format, distance, framed subject and focal length, OK? Now, explain to me, please, just how one picture can need more or less cropping (if any) than the other. Surely, if the Sigma is set at a different focal length it would have to be a shorter length given that it's already set at it's maximum length, correct? Now, would the picture taken with the Sigma need less cropping than the one taken with the Canon? Not hardly. And being a 100-300mm zoom it can not be set at a longer FL than the Canon, correct? So the added sharpness of the Canon can't be negated because that picture will not require cropping, in this case, to be like the Sigma's picture, leaving nothing to negate, correct?

Allow me to address the "You should try some of these lens you comment about." thing. I have had several third party lenses. Some I really liked and some I didn't. The couple of lenses that I really liked (3rd party) were not zooms, but primes. Among them were Vivitar,Tokina, Tamron and, yes, Sigma. I read where there are problems using one of the third party makers with the 50D. Now finally, as Forest Gump would say. "That's all I have to say about Vietnam".

have the 70-200 f4l canon and the 100-300f4 sigma, use the canon wqhen weight matters, sigma when need reach and it does take the 1.4sigma tc better than the canon

ymmv

jr_senator wrote in post #6959586
I took your advice and reread what was said. It says just what I thought it did. Let me ask you ...now, first lets keep in mind that the lenses in question are the 100-300mm Sigma and the 300mm Canon. Now lets take a look at what was said, "...the Sigma is a zoom and doesn't need as much cropping, therefore negating any sharpness advantage the Canon may have.". Now, we set each lens the same distance from the subject and frame the same subject. Since one lens is a fixed 300mm, and using the same format and distance, the 100-300mm will have to be set at 300mm, correct? Same format, distance, framed subject and focal length, OK? Now, explain to me, please, just how one picture can need more or less cropping (if any) than the other. Surely, if the Sigma is set at a different focal length it would have to be a shorter length given that it's already set at it's maximum length, correct? Now, would the picture taken with the Sigma need less cropping than the one taken with the Canon? Not hardly. And being a 100-300mm zoom it can not be set at a longer FL than the Canon, correct? So the added sharpness of the Canon can't be negated because that picture will not require cropping, in this case, to be like the Sigma's picture, leaving nothing to negate, correct?

Allow me to address the "You should try some of these lens you comment about." thing. I have had several third party lenses. Some I really liked and some I didn't. The couple of lenses that I really liked (3rd party) were not zooms, but primes. Among them were Vivitar,Tokina, Tamron and, yes, Sigma. I read where there are problems using one of the third party makers with the 50D. Now finally, as Forest Gump would say. "That's all I have to say about Vietnam".

J think you need to try rereading it one more time, the whole thing.

So you have never used the Sigma 100-300mm f/. So your comments on it are baseless .

CountryBoy wrote in post #6959987
J think you need to try rereading it one more time, the whole thing.

OK, I have re-reread it, in fact, I have it memorized. I still do not see anything that will cause the Canon 300mm's photo to need cropping or more cropping than the photo taken with the Sigma. I have, at your request, reread and re-reread the post. It appears I just don't understand why the Canon 300mm's photo needs cropping or more cropping than the photo taken with the Sigma. Ifr you can explain how this can be, please do. If you can't, I understand, I really do.

jr_senator wrote in post #6960293
OK, I have re-reread it, in fact, I have it memorized. I still do not see anything that will cause the Canon 300mm's photo to need cropping or more cropping than the photo taken with the Sigma. I have, at your request, reread and re-reread the post. It appears I just don't understand why the Canon 300mm's photo needs cropping or more cropping than the photo taken with the Sigma. Ifr you can explain how this can be, please do. If you can't, I understand, I really do.

It's really so simple, i can't believe you can't get it . If you haven't figured it out by tomorrow night, i'll explain it to you then. Maybe