Kenko 1.4 TC vs. Tamron

OK, I have read the sticky and did a lot of searches. I plan on getting a 1.4TC for my 70-200 2.8is to be used on my 40D. I read that the Kenko pro 300 DG is very much liked . How would the Kenko compare to the Tamron SP AF pro. I like the idea that the Tamron is white and $10 cheaper at B&H.Anybody try both and find any difference? I think I read that the Tamron is non-reporting? What does that mean? I have never used a TC so I want to make the right choice the first time. The Canon TC is out because I don't want to spend that much for something that would not get much use. Thanks in advance.

Kenko and Tamron SP - same thing, just different colors.

gasrocks wrote in post #7892582
Kenko and Tamron SP - same thing, just different colors.

Then I guess I'll go with the Tamron ,10 bucks cheaper and the same color as the lens . Thanks!

Non-reporting means the camera doesn't know its there. It simply passes the f-stop from the lens as it is. A reporting TC will report an f-stop that has been "affected" by the TC, 1-stop increase for 1.4x, 2-stop increase for 2x... so your 70-200 f/2.8 would show maximum aperature as f/4 on a 1.4x TC that is reporting, while showing it as a f/2.8 on a non-reporting. For the f/2.8 you might as well get a reporting TC, because even if you use a 2x, the 40D can AF with a f/5.6 (which f/2.8 + 2x TC make) lens.

Non-reporting TC's are probably more useful for f/4 lens owners who otherwize would have to use the "tape trick" in order to not report the aperature and be able to use AF.

nureality wrote in post #7892806
Non-reporting means the camera doesn't know its there. It simply passes the f-stop from the lens as it is. A reporting TC will report an f-stop that has been "affected" by the TC, 1-stop increase for 1.4x, 2-stop increase for 2x... so your 70-200 f/2.8 would show maximum aperature as f/4 on a 1.4x TC that is reporting, while showing it as a f/2.8 on a non-reporting. For the f/2.8 you might as well get a reporting TC, because even if you use a 2x, the 40D can AF with a f/5.6 (which f/2.8 + 2x TC make) lens.

Non-reporting TC's are probably more useful for f/4 lens owners who otherwize would have to use the "tape trick" in order to not report the aperature and be able to use AF.

Thanks for the information !

claybuster wrote in post #7892261
OK, I have read the sticky and did a lot of searches. I plan on getting a 1.4TC for my 70-200 2.8is to be used on my 40D. I read that the Kenko pro 300 DG is very much liked . How would the Kenko compare to the Tamron SP AF pro. I like the idea that the Tamron is white and $10 cheaper at B&H.Anybody try both and find any difference? I think I read that the Tamron is non-reporting? What does that mean? I have never used a TC so I want to make the right choice the first time. The Canon TC is out because I don't want to spend that much for something that would not get much use. Thanks in advance.

There are two Tamron 1.4X converters apparently, namely a black, cheaper one which looks identical to a Canon extension tube except for the lettering and obviously the glass it holds inside, and the white one, which apparently is a rebadged Kenko?. The latter, the white one, is a reporting converter, the former, the black one, is a non reporting converter (and cheaper still).

Kind regards, Wim

The Kenko Teleplus Pro 300DG is a reporting converter. On my 135mm f/2 L the camera reports f/2.8 and the quality is outstanding.

claybuster wrote in post #7892261
Kenko pro 300 DG...
compare to the Tamron SP AF pro

Same thing. I have the Kenko Pro 300 DG. Works great. Reports perfectly.

The Kenko model comes in white as well. Tristate camera $180

Shame that Canon is out. Canon body and one of the best Canon lenses in the lineup.

halitime wrote in post #7896093
The Kenko model comes in white as well. Tristate camera $180

Thanks! Tristate has them cheaper than B&H

claybuster wrote in post #7901046
Thanks! Tristate has them cheaper than B&H

And terrible customer service. I know from experience:

http://www.resellerrat​ings.com …amera_Video_and​_Computers

BenJohnson wrote in post #7901057
And terrible customer service. I know from experience:

http://www.resellerrat​ings.com …amera_Video_and​_Computers

There are only 6 vendors I do business with.

Abe's of Maine
Adorama
B&H
Beach Camera
KEH
The Imaging World

The color of the Kenko depends upon vintage of the convertor. The year before I bought my Pro 300 DG years ago, they were white; when I bought mine, they were black. Same model, same optics, different cosmetics. I verified with Kenko about color not related to optical design. Since I have a Canon in white and a Kenko in black, I can match the lens that I wish to use it with! The Kenko also has the advantage of not having optics that stick out in front of the mount, so it fits my 100mm (which the Canon 1.4x would not).

BenJohnson wrote in post #7901057
And terrible customer service. I know from experience:

http://www.resellerrat​ings.com …amera_Video_and​_Computers

Thanks, I was going to check the seller ratings after dinner tonight. Guess I'll pass on tristate.