-=FAQ=- Teleconverter/T-Con Tele extender Discussion

gcogger wrote in post #2343688
Yup - that would be a very good combination

Thank you for all your kind help. This cock up should lead me nicely into a far better quality lens kit, so all is not lost after all. I just hope the missus doesnt check the bank statement next month...

Just ordered the Canon EF 70-200 F4 L USM. £395 delivered. So all in all, this 280mm plan of mine has just cost me about £590.00

Still, from what i read on this forum its a pretty incredible lens for the money, so i look forward to trying it out this weekend.

Sorry for going off topic, but at least it may educate newbies that not all canon lenses will accept a canon teleconvertor, which in my nievity is what i assumed.

Good info on this thread. I'm thinking about getting a TCON for Christmas. I would use it mainly for my 70-200/4 until I can upgrade to a 2.8 IS. Longer term, I want to get something like a 400/5.6 for more reach.

I'm stuck between the Canon and the Kenko pro 1.4x. Seems that both are good, but is the Canon worth the extra $100?

I've read the excellent piece put together on teleconverters and through the long thread of discussion. But nothing seemed to hit on a question I posted on one of the other forums, so I'm hoping to find help here.

I have a Canon EF 2X II extender and have been happy with its performance w/ a friend's compatible Canon lenses. I am considering purchasing a Sigma APO 70-200mm f/2.8 EX DG HSM Lens to use on my Digital Rebel (alone and with the extender).

Any thoughts on how (if) this Sigma lens works with the Canon EF 2X II extender??
Any charts or other documentation that shows Sigma lenses compatibility with this Canon extender??
Looking forward to here what the experts out there have to say.

I would like to know which of the TCs (1.4 or 1.5) work best with the 70-300 f4-5.6 IS usm; seems like they work but there are no comparisons side by side.

photo newby wrote in post #2491097
I've read the excellent piece put together on teleconverters and through the long thread of discussion. But nothing seemed to hit on a question I posted on one of the other forums, so I'm hoping to find help here.

I have a Canon EF 2X II extender and have been happy with its performance w/ a friend's compatible Canon lenses. I am considering purchasing a Sigma APO 70-200mm f/2.8 EX DG HSM Lens to use on my Digital Rebel (alone and with the extender).

Any thoughts on how (if) this Sigma lens works with the Canon EF 2X II extender??
Any charts or other documentation that shows Sigma lenses compatibility with this Canon extender??
Looking forward to here what the experts out there have to say.

canon's TC won't fit the sigma 70-200

Hi

I am just beginning to look into getting a DSLR-budget is tight, but stretching for a 30D and CanonEF 70-300 IS USM (non-DO). Just wondering if the Kenko might work with that lens as well, since they are pretty similar. I take a lot of wildlife pictures...from a kayak, often. I think I read somewhere that this works, but can't find the post. Anyone know?

Thanks!

Newbie

C.crawford

Dante King wrote in post #568559
Kenko 1.4X Teleplus DG Pro 300 TC with Canon 70-300 DO IS USM:

I had read on this forum that this combo would work. It works beautifully with no AV problems at all. The lens and TC fit together nicely and there is no play btw the two parts.

Aperture communication works like the TC is not even on the lens. I have had no errors or problems with anything AV related with this combo.

Focus works well in every situation I have tested. The only time this combo has had problems focusing was at 300mm trying to lock on a soaring hawk. The DO alone would not have to hunt. Other than this one issue, which was worked around by zooming out a few mm, this combo has worked flawlessly.

Link with Samples

I have found no compromise in contrast or color rendition by using this set up. Only downside is that this combo is a bit soft at 300mm. This was a nice purchase to increase the range of this lens and others to come.

Somewhere in this lengthy discussion, I believe I posted, one of my few in years, that I have the Canon 70-300 USM IS, non DO and I have the Kenko 1.4 TC. No problems with it except you need good light. OC the TC cuts down an f stop, but with the IS there is some compensation there if you are hand holding the camera. Good Luck. BTW, I would have bought a Canon TC, but it won't work with this setup.

I have recently purchased a Kenko 1.4 pro 300 T con to use with my 20D and 75-300 4-5.6 USM mk3 lens. To my surprise i still get 4-5.6 and also auto focus. I am very pleased with the sharpness of this lens and would reccomend it .

Regards

Peter

PS Its nice to be called a junior member at 64 years of age.

I've just got the Kenko 2x MC4 to use on my 350D. It works fine with my Canon 75-300 (no USM though), gives me manual focus with my 17-70mm Sigma, but gives me error code 01 when I mate it with my 600mm Sigma Mirror lens. Is there any way to "con" them into playing with each other? I only really bought it to use with the mirror (although it gives me a light travel option to give longer telephoto rather than carrying the mirror), especially to take moon pics. The moon looks great (and full frame) with the Kenko on, but the camera just won't take a pic....any ideas?

Graham

This quote from the first page has me interested

"5. T-cons WILL degrade the final image quality f the lens in use."

Ok I have the canon 70-200 F4 L and i like to photograph birds. The 200 is just not enough reach. I was using a Ef 100-300 usm lens with good results but switched to the L lens for quality images in other areas. My question is how much do the TCs degrade the image? should I go with the 1x4 TC which would bring me up to almost the 300mm reach i had before. Or do I search Ebay for a reasonable quality 300mm reach lens for birds only?

Does the Canon 70-300 IS USM accept any kind of TC?

ClickClick wrote in post #2675929
Does the Canon 70-300 IS USM accept any kind of TC?

it will fit and work but I know for the 2x you can only use autofocus very limited, which is where it normally operates at 4.5, which is 70-100 I believe, after that its manual

I asked this question a while age. here are 2 answers:

My question:
Hi

I am just beginning to look into getting a DSLR-budget is tight, but stretching for a 30D and CanonEF 70-300 IS USM (non-DO). Just wondering if the Kenko might work with that lens as well, since they are pretty similar. I take a lot of wildlife pictures...from a kayak, often. I think I read somewhere that this works, but can't find the post. Anyone know?

Thanks!

Newbie

C.crawford

Answer:

Quote:
Originally Posted by Dante King

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ClickClick wrote in post #2675929
Does the Canon 70-300 IS USM accept any kind of TC?

ME:
Although this lens is a DO, I believe the results might be similar.

Here's the other quote:

Somewhere in this lengthy discussion, I believe I posted, one of my few in years, that I have the Canon 70-300 USM IS, non DO and I have the Kenko 1.4 TC. No problems with it except you need good light. OC the TC cuts down an f stop, but with the IS there is some compensation there if you are hand holding the camera. Good Luck. BTW, I would have bought a Canon TC, but it won't work with this setup.

END QUOTE

ME:

I'll probably get the Kenko 1.4 some day- just invested in a 30D, 17-85 and 70-300, so that's all i can afford for now! It's been absolutely freezing here since I got the camera, so not much in the way of results yet!

Good luck

Cindy

2x Tamron-F AF MC7 (looks suspiciously the same as the Kenko Teleplus MC7) works with Canon 75-300 (non-IS, non USM) except in low light, at the end range it hunts (mind you it does that without the TC!).

Tamron with 70-300 IS DO can only get MF.

Anyone know any 2x that will AF with the DO?