Reviews and Problems with Kenko 2x Teleplus Pro 300 DG Teleconverter
Showing 1-10 of 31
Not worth it
R. O'HARA, Amazon
2 August 2013
Summary: I got this 2x converter in hopes of turning a 70-200 f2.8 into a suitable replacement for having to take that lens plus a 400mm lens for various events, but it quickly proved to not be the case. First off, it can't focus well in any kind of light. Even bright midday sun it causes the camera to miss by a lot. The image as a thumbnail or on the lcd screen might look ok, but it quickly becomes apparent it can be a lot better as you zoom into the image.
A good alternative if you want to use f/4 lenses with a 2X teleconvertor on Canon cameras
Michael C, Amazon
21 June 2013
Summary: After reading many of the reviews here I bought this item and tried it out. Here is what I found. Autofocus is a little slower but it is accurate on my 7D with the Canon EF 70-200mm f/2.8L IS II USM Telephoto Zoom Lens for Canon SLR Cameras . AF is still fast enough to use for sports, but you do have to anticipate your shots a little more.
Summary: Works great on all of my Canon EF and EF-S lenses, very little loss of image quality. Doesn't work as well with Sigma lens (becomes f/11) and needs very good light conditions for AF to work but if you get the manual focus right you still get sharp results. On Canon EF 70-200 f/4 L auto-focus still works with Kenko 2.0X PRO 300 Teleconverter DGX for Canon EOS Digital SLRs and a Canon EF 1.4 TC II in tandem with good light and still retain decent image quality.
Summary: Combining any TC with any lens will reduce sharpness and incoming light. The Kenko produced great results when combined with 5D MKIII and EF 70-200mm f2.8 L II IS USM, the results were very acceptable. Kenko uses sister company Hoya for the glass (producing glass for many lens manufacturers.) Kenko tops Canon extender in price- half the cost and compatibility.
Summary: I ordered this instead of shelling out big bucks for a big lens. It was shipped along with a tv wall mount in a box with maybe 5 of those plastic air bubbles for padding. This item was actually outside of the box that it was supposed to be in and rolling around inside the larger box. It does appear undamaged but ... when I attached it to the camera and then attached my Tamron 70-300 zoom lens the trouble started.
Very little loss of sharpness, even at wide apertures
Cool Hand Luke, Amazon
3 April 2013
Summary: I bought this extender to use with a 200mm f2.8 L USM lens and I have been very impressed with the image quality. Even wide open at f5.6 sharpness is great, although there is a slight but barely noticeable loss as compared to without the extender. Stopping down does help increase sharpness but I believe that this is only because it makes the depth of field larger.
Summary: It fits well, actually allows focus with the Canon 100-400 L lens and takes reasonable images, and reports the correct mm. But a word of caution...at 800mm, unless you have a very, very stable tripod, holding the thing still is very difficult. Due to the higher minimum f stop, one is somewhat forced to use slower shutter speeds. We have a nice carbon fiber one, and here, light weight is not your friend.
Summary: I purchased this unit after seeing other's reviews for both this model and Canon's. The Canon version which costs approximately $200 more, only works with select "L" lenses. The kenko version I purchased works with my "L" lenses, 100-400L IS and 24-105L IS as well as with my 100mm f2.8 macro. (Canon's does not work with the last two lenses judging from the reviews that I have read.) I am more than satisfied with the quality of glass. (I am an amateur photographer.