2x AF Teleconverter - DPChallenge Forums

08/29/2005 03:32:03 AM · #1

Is this a good one? Does anyone have this in hand? Does it or will it work?

Canon EF 24-70mm f/2.8L USM

08/29/2005 08:38:00 AM · #2

bump

doctornick

Apple iPhone 13 Pro

08/29/2005 08:43:41 AM · #3

Kenko in general makes good products. Remember your image will be degraded by using a TC. If you start with a so so lens the TC will make it a lousy lens. You might also lose AF.

alanfreed

Nikon Z9

Nikon AF-S NIKKOR 24-70mm f/2.8G ED

08/29/2005 09:02:17 AM · #4

I don't know much about this brand, but I met a guy at a Steelers game recently who had a similarly-priced one, and he was deeply disappointed with it. His did very poorly with autofocus, and actually jiggled a little against the body because it wasn't a tight fit.

If you're serious about the capabilities of a TC, I'd spring for the extra $$ to get one that's better suited.

Chiqui

Olympus OM-D E-M1 Mark II

Olympus 12-40mm f/2.8 Pro

08/29/2005 09:21:59 AM · #5

I've heard that the 2x tele is quite soft and I know people that have the Canon 1.4x and swear by it. There are some lenses that the teleconverters wont work with, you'll loose IS and AF, I happen to own one of those lenses, the Canon 100-400 so a tele would really not be of any use to me. Hope that helps.

June

Message edited by author 2005-08-29 09:22:32.

kirbic

Canon EOS R5

Canon RF 24-70mm f/2.8 L IS

08/29/2005 10:08:10 AM · #6

The Kenko teleconverters are reasonably good, and will likely work withmore lenses than the Canon version. Also consider the Tamron TCs. On a 1.6-crop cam, they are not all that far off in performance from the Canon. A little more softness in the corners, a little less contrast.
Be aware that although the Canon converters are the highest quality available, they only work with some lenses. Of the lenses you list in your profile, only the Canon 70-200 is compatible with the 2.0X II (or 1.4x II) converters.
As previously posted, a 2x converter really will test a lens. You're magnifying the center of the image produced by the lens by a factor of 2x *linear* magnification, so you're using only one quarter of the area as without the converter. As you magnify the image, you magnify any softness, CA, etc. And you lost two stops, so your f/4 lens becomes an f/8 lens.
I'd recommend that you pick up the Tamron 1.4x converter (not the pro version). I think that one is available for about $80 USD. You'll lose less light than witha 2x, and keep more quality. You'll still want to use it with good glass, but it will be more forgiving than the 2x, and compatible with more lenses than the Canon. I have it and I feel it is a good performer.

Nikon AF-S DX Zoom-Nikkor 12-24mm f/4.0G IF-ED

10/17/2005 05:13:26 PM · #7

I know I asked this before but does anyone have thoughts about the Sigma teleconverters? I have a pretty decent glass with my 70-200L and was looking to "extend" it a bit more. I'm already looking at the Tamron 1.4x per Kirbic's suggestion.

Would it work with my other lenses (except the kit lens of course).

Additional thoughts from users would be great :)

Tamron 1.4x Pro
Tamron 1.4x Teleconverter
Sigma 1.4x Teleconverter

jbsmithana

Nikon D300

10/17/2005 05:18:22 PM · #8

For what it is worth I have the Tamron 1.4x Pro model (one extra piece of glass over the basic model) and it works well on both my Nikon 70-200 VR 2.8 and my cheaper Tamron 200-500 lenes.

Message edited by author 2005-10-17 17:19:39.