1.4 & 2X Extenders

So lets talk about these extenders and how sharp they are along with how well they work with different lenses and body's.

I have a 70-200 IS 2.8 II and a F4 IS along with a 24-105.
A bunch of other lenses but I imagine that I would only want to use these with the longer stuff.
5D2 and a couple T2i's as well.

Please feel free to talk about the sharpness and compatibility with what you feel is good and bad.
When I think about buying an extender and being able to get that extra reach without losing too much in sharpness I think I need to add one of these.

But which one and why?

Thanks in advance.

Karl

The 24-104 does not take the Canon extenders and is not recommended for other extenders.

I have a little test of the 1.4x Mk II here. I like it.
https://photography-on-the.net …showthread.php?​p=12893895

When it comes to the 2x TC, I prefer the Kenko MC4 DGx 2x TC vs the Canon 2x II TC... mainly due to the weight and size. The Canon variant has a lot more glass inside and is twice as tall. In my Lowepro Slingshot 300 pack, I can barely fit in a 70-200, gripped body, with 2x Kenko attached. With the Canon TC, it's too long by nearly 2 inches.

As far as performance goes, more light lost in the canon variant. Contrast and sharpness are nearly identical. Huge difference in price ($100 vs $240). Go with what makes the most sense to you.

MOkoFOko wrote in post #10356758
Body
Canon 7D (gripped)
Canon 1D mark II
Canon EOS 5D classic (gripped)
Canon EOS 30D
Canon EOS T3i
Canon EOS 10D (720 IR)
Canon EOS Rebel II (I'm trying FILM!)

Lenses
Canon 70-200mm f/2.8 IS II L
Canon 24-70mm f/2.8 L
Canon 24-105mm f/2.8 L
Canon 16-35mm f/2.8 L
Canon 100mm f/2.8 L Macro
Canon 18-55mm IS (backup)
Sigma 50mm f/1.4
Canon 35-80mm Power Zoom

WOW where can I get one and how?

Lots of negative reviews on Amazon on the 2X.
Should I stay with the 1.4X on the 7-200 2.8 II ?

I like my 2xIII on my mkii, and the 1.4xII is great on it as well.

MadTony wrote in post #12948547
I like my 2xIII on my mkii, and the 1.4xII is great on it as well.

Second that, 2X III is very, very good on 70-200 MKII, and 1.4x II is close in performance to 1.4x III except III has better CA correction at edges, which is easily fixable in ACR.

I love the 2X III on the 70-200 MKII. I also like the portability of this combination.

Silverfox1 has done a lot of tests with different teleconverters and they are pretty good.

You can find them here: https://photography-on-the.net …p=11838240&post​count=2707

T1i + EF Extender 2X III + TS-E 90mm - didn't strike me as great, haven't tested it out in great depth though. Aperture reported wrongly to the camera (still shows as f/2.8 wide open, even though it's now f/5.6).
+ Sigma 120-300mm f/2.8 OS - introduces some AF problems and maybe exaggerates the metering problems of the camera. Image quality across the full frame is great though.

Recently I accidentally touched one of the elements on the extender very slightly, and it didn't leave a mark. My fingers were very clean and dry, but dang. Note to myself, I should have used the q-tip sitting there on the table to get that piece of dust out (or just left it, it wasn't bothering anything).

So the 2X III is the best bet for the 70-200 2.8 II. ?
Do any other lens makers have anything as good or better?

Thanks

How does the Kenco 300 2x compare to the Canon 2x Mk III?

I only use the 1.4x, and that's only if I have to use it to get the shot. I tried out a 2x and was not impressed by the reduction in quality, too soft, too much added distortion in my opinion. This is a product you really should try out first before buying. I had always planned on getting a 2x, but after I tried it out it changed my opinion completely. I carry my 1.4x in my bag everywhere, but like I said, I'll only use it if it absolutely have to, as there is still a reduction in image quality, and auto-focusing speed.

I use it on my 70-200 f2.8 non-IS.

Im looking at the Kendo MC4 DGx 2x at the minute for use with my 40D and 70-200 f4L at airshows, anyone tried the combo of this TC with the f4l?

DarklingSmilie wrote in post #12952536
Im looking at the Kendo MC4 DGx 2x at the minute for use with my 40D and 70-200 f4L at airshows, anyone tried the combo of this TC with the f4l?

That will probably leave you with no autofocus unless you tape up a couple pins.