jimdavis

<p>I had mine serviced last year. They replaced I think the fluorite glass and got the focus ring working like new. It cost half the price of a new one. I haven't used it that much since I got the 75-300L IS. In a side by side comparison the new lens snaps to focus, while the 100-400 is much slower to focus. This comparison on some trees in full sunlight.<br> I shot a lot of birds in the old days with the 100-400 and was very happy, it was able to follow a bird in flight nicely. But the 75-300 is just superb. I shot some dogs playing and it kept focus at all times easily.<br> The zoom on the 100-400 is far inferior to the ring focus on the 75-300. It's slow and not precise. You need to move your left hand way out there.<br> I shoot the 75-300 with a 1.4x extender when I need the extra reach. Or I just crop a bit.<br> I'd love to have an updated 100-400.</p>

<p>Wow, some people think a crop camera is only a temp solution until they can get a FF camera. I beg to differ. I love my 70d, with the 10-22 wide zoom no more need of a FF camera. Meanwhile I get more length in my lenses, always a good thing.<br> <br />The movie ability of the 70d is no small thing. I've shot hand held action pics of dogs running and the focus was always perfect even zooming with the 75-300. And who doesn't want to take movies sometimes.<br> I would say for portraits though that a single focal length is too limiting. F2.8 is plenty, suggest a medium zoom 2.8 lens with the 70d.</p>

<p>I have found with the 70-300L IS and my 70d, using IS makes a clicking noise during the video. It works great to stabilize hand held video and it's very sharp, focuses great, but I don't know if the clicking sound can be removed.<br> This lens with IS off would certainly be much better than the lens that you're using now and I highly recommend this lens.</p>

<p>I got an EFS 10-22 and love the zoom range, wide angle etc. But I'm disappointed with sharpness. It's ok in the center regions but outer third is just plain fuzzy no matter what fstop etc I use. Maybe I got a bad copy? Or I'm expecting too much. Overall images with it look pretty good though, but for the price I was expecting better.<br> <br />For all purpose lens I have an EFS 17-85 IS and it's pretty sharp all over at all zooms and fstops. Can't complain for the price and it focuses pretty close too.<br> BTW I have a 70D and love it. I mostly use it with my 75-300L IS and a 1.4x for birds and animals. One day I'll get an L lens to fill the 16-75 range but would prefer a 10-22 that was really sharp all over.<br> I took some of my first real videos with the 75-300 hand held of a bunch of dogs running and playing. The auto focus worked amazingly well at all distances and speeds. I will turn the IS off next time though because you can hear it clicking.</p>