So I believe I've mad a terrible mistake.

Ok guys and gals I need your assistance.

First off I do a lot of automotive shots whether it's still or track events. I noticed that I was lacking on the big end, so I decided to sell my Canon 70-200MM f/4L and pick up the Canon 100-400MM L when I had the means.

Well now I'm starting to regret selling my 70-200 and I think I may want another and just use a TC, but I have a question.

First off I know I'd lose a stop with a 1.4X, but since I'll be gaining a longer focal range will my bokeh pretty much stay relative to what it was when the lens was 70-200 f/4? I search EVERY topic and I'm sure this has already been answered, so forgive me, but it's late here in VA.

Thanks in advance,
Joe

Buy the Canon 1.4x TC because its designed for these lenses exclusively and works flawless with it, with out losing much IQ.

The Bokeh stays consitant to the f4 lens I noticed when I used this combo. The loss of f4's bokeh os made up for the longer reach it seems.

Thank you cjm. I figured since the focal range became longer with the change in f/stop that it'd pretty much stay the same, but I wasn't sure. I honestly don't need 400MM, but I'd love to have it. Another 70-200 f/4 and 1.4x TC won't hurt my wallet as much either.

BUT..

Your AF will slow down quite a bit.

If your using it for fast action photography, or anything of the sort, then I'd suggest the 100-400 if thats what your set on shooting.

The 70-200 f/4 works well with a 1.4x TC but don't expect blazingly fast AF. And the 100-400 is f/5.6 at 400, so the extra reach could be useful.

Cheers,
Adrian

AdrianVall wrote in post #2673100
BUT..

Your AF will slow down quite a bit.

If your using it for fast action photography, or anything of the sort, then I'd suggest the 100-400 if thats what your set on shooting.

The 70-200 f/4 works well with a 1.4x TC but don't expect blazingly fast AF. And the 100-400 is f/5.6 at 400, so the extra reach could be useful.

Cheers,
Adrian

Another very good point. Right now I have the cash to buy the 100-400, but I'm trying to sell one of my vehicles and I need the money to put towards the loan. If I could sell that thing soon the 100-400 would be mine.

Here's hoping!

Thanks for all the help,
Joe

I tried a 1.4 TC on my 5D/70-200 f4 and also my 100-400L and found that I could simply crop the original picture [no TC] from the lens and get the same results as using the TC. I think TCs are fine for film cameras but not needed for digital cameras. If you add the cost of a 70-200 f4 and a Canon TC you are very near the cost of the 100-400L. The 100-400 will have IS which can be a big advantage with a telephoto lens.

I use the 100-400 for wildlife head shots and shore scenes where more reach is needed. The 70-200 is a good backyard lens [LIghter to handle] where relatively close pictures are taken.

Hope this helps.

I wouldnt fret too much. If you get a good copy like I did you wont regret it one bit. As I have stated before in other posts, my 100-400 is my favorite lens even over my 70-200 2.8/IS

Hmm, also take a look at the Sigma 100-300/4.0?

That lens normally gets rave reviews (among the best of the Sigma lineup) an has it both ... range and speed.

Best regards,
Andy

Andythaler wrote in post #2773019
Hmm, also take a look at the Sigma 100-300/4.0?

That lens normally gets rave reviews (among the best of the Sigma lineup) an has it both ... range and speed.

Best regards,
Andy

I've been SERIOUSLY contemplating that one. I'm in love with my 10-20