That III will auto-focus over 5.6.

I called Canon before about That same problem. Those extenders will not focus higher then f/5.6 which wouldn't be a problem anyhow because you will be on a Tri-Pod anyhow. I'm going to purchase a 1/4 too.

I have a Canon 5d Mk II and I love mine too. I have two L Series Lens lived in Texas for two years and I am single

This might be the problem with focusing problem. I can't pass the eye test for driving. My eyes play tricks on me. I wear contacts. I would get your eyes checked. I'm almost positive that is your problem. Being far sighted is a problem. You can not see close-up. If you wear glass' I will bet that is it.

The is does a good job when shooting fast and when using multiple focus points. It will leave non in the dust. I have two of them. 100-400 mm. 24-105mm. You always get what you pay for. Plus you can use non or is.

I knew the Canon Tech s would point u in the right direction. Good

Very good decision. We all learned from this

Were here to learn and help. That's what everyone should be doin on this site p

It could be a older lens. I have the 100-400 mm 1:4.5-6 L IS. Sells for $1,600. I have a 24-105mm 1:4 IS USM. $1,000. Both are Canon. Love both these Lens. I read your comment and went to my bag. Put everything together. Listened to both Lens could hardy hear any noise. Put my ear to both Lens. Could hardy hear any noise @ all. I would call Canon Techs they are very good. They will tell you one way or the other. Tell the they are used and from E-Bay. They are very informative and know what they are talking about. 1-800-652-2666 I myself would send it back. If that noise is not suppose to be there it will not last very long @ all it's not worth it. Lots of luck and keep take in pictures

That's right. The Can or the Nik. There's no difference. Its the person behind the Camera. You are only kidding yourselves.

Nice Perch.

Your right Jen. You have to start somewhere. Don't let people get you down. Do little ones where people don't have a lot of money to spend. Let them know your just startng out. Show them some pictures you have taken. That's why you are cheaper then the others. You will get. Better. Keep asking guestions. That's how you learn. There are a lot of people thAt know what they are doing And have very good ideas. Oh Jen make sure you have a card in the camera. Mine has a setting you have to have one in to shoot. Good Luck. Don't be nervous. You will do find. Correct the mistakes and you will get better.

I was asking myself the same thing on weddings. I have this lens do you use a flash with it ? Did mean to take over the main topic.

I just found your e-mail on the Canon Grip. The site you sent really helped thanks. Mine is a canon grip a real one. Thanks again for the help. p

I am looking for a Camera Bag that will hold two body's & three lens. This bag needs to be water proof. Where can I find one. If boat turns over.