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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses
Thread started 07 Oct 2017 (Saturday) 13:22
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Mini-Review: YongNuo 2x III TC (Canon Knockoff)

 
TeamSpeed
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Oct 21, 2017 20:02 |  #31

And one of the local wildlife in our house.

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TeamSpeed
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Oct 26, 2017 12:37 |  #32

With the big Canon sale, I picked up a Canon III version, and will see if it has the same issues. If not, the YN will go back to Adorama. If so, then I will just sell the Canon. :)


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TeamSpeed
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Oct 30, 2017 16:40 |  #33

Okay, give me a few minutes to add several replies to cover the next 10 photos. I did a quick comparison to the Canon MKIII 2x so that everyone can see the differences. First I will give my thoughts on this, and then add all the photos.

AF Speed

The 2 are very close to each other to call this a draw. They are both quite fast on the 70-200 II for example, the AF just jumps to focus, no real lag.

Fit and Finish

There are noticeable design differences between these 2. They are both built well, but the Canon has a nice black seal ring where it mounts to other lenses, the YN has a red anodized recessed ring. This means the front of the TC is not sealed at all unless your lens has a seal. The rear seals are nearly identical. The machining on the Canon is more refined and it doesn't hang on some lenses I have tried where the YN might be a bit tighter of a fit.

The YN is shorter than the Canon, and the front element sticks out less than the Canon. This means that this TC can actually mount to more lenses depending on the rear element to flange distance of said lenses.

The inner elements seem to be more restrictive on the YN, and a bit more open on the Canon, so it is most certainly a different lens configuration inside.

IQ

Again, I call this a draw, they are both quite good, and nearly identical both in the center of the frame and the edge.

Operations

This is where the differences become more noticeable. The YN will over expose on newer bodies like the 7D2 and 5D4, and expose properly on cameras like the Rebel SL2 and most likely older offerings. It is an odd thing. The Canon has no issues. The YN causes camera lockup and errors on the 7D2 and 5D4 on the Sigma 150-600 (no errors on the SL2), but no errors occur with the Canon TC on the same cameras.

Conclusion

If you only really care about AF and IQ, or care about budget, and can live with setting a negative exposure compensation, should your camera model need it, then the YN is a good buy at 1/2 the price of the Canon. If you don't want to mess with such things, and just want the TC to work well as an overall package, then the Canon is the better tool. If you shoot in the elements, the Canon gets the nod there as well, with a better front seal Oring.

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Oct 30, 2017 16:41 |  #34

More comparisons, you can see where the machining is more refined on the Canon, and how the Canon (left sides) seems more open internaly in the lens group.

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Oct 30, 2017 16:42 |  #35

More pics showing the front of the TC

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Oct 30, 2017 16:42 |  #36

And finally the overexposure using the same exact settings and subject material, in AV mode. I had to dial in just over 2 stops under exposure with the YN to get the same exposure. YN on the left...

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Oct 30, 2017 16:44 |  #37

Comparison shots, Canon first, then the YN at 2 2/3 negative EC. I probably should have dialed in 3 stops actually to bring these more in step with each other.

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Oct 30, 2017 22:11 |  #38

TeamSpeed wrote in post #18484887 (external link)
More pics showing the front of the TC
thumbnailHosted photo: posted by TeamSpeed in
./showthread.php?p=184​84887&i=i149316795
forum: Canon EF and EF-S Lenses
thumbnailHosted photo: posted by TeamSpeed in
./showthread.php?p=184​84887&i=i247221313
forum: Canon EF and EF-S Lenses


YongNuo has to be better, it has a RED RING! :)


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russbecker
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Nov 09, 2017 09:11 |  #39

Sounds as if the YongNuo 2x III isn't worth it, unless you have but one camera body and one or two lenses you plan to pair it with and don't mind putting up with the bother.

I have experienced similar exposure compensation, as well as AF, issues with a Kenko 2x using a 7D and 7D2. In both cases -2 f-stops of EC is required, only the outer AF pts work, even though the center AF pt is supposed to work at f/8 (2x TC on f/4 lens). I suspect that the non-reporting TC doesn't tell the 7D2 to make use of its f/8 capability on the center PT. Outer AF pts are functional, as they are on the 7D.

Sometimes you get what you pay for....


7D2 | 7D | 40D | 300 f/4 L | 70-200 f/2.8 IIL | 70-200 f/4L | 135 f/2 L | 85 f/1.8 | 100 f/2 | 60 f/2.8 macro | nifty-fifty | 10-22 f/3.5-4.5 | Tamron 150-600 | Tamron 17-50 f/2.8 | Sigma 30 f/1.4 | Sigma 50-150 f/2.8 | Sigma 120-400

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Nov 09, 2017 10:33 |  #40

russbecker wrote in post #18492572 (external link)
Sounds as if the YongNuo 2x III isn't worth it, unless you have but one camera body and one or two lenses you plan to pair it with and don't mind putting up with the bother.

I have experienced similar exposure compensation, as well as AF, issues with a Kenko 2x using a 7D and 7D2. In both cases -2 f-stops of EC is required, only the outer AF pts work, even though the center AF pt is supposed to work at f/8 (2x TC on f/4 lens). I suspect that the non-reporting TC doesn't tell the 7D2 to make use of its f/8 capability on the center PT. Outer AF pts are functional, as they are on the 7D.

Sometimes you get what you pay for....

Just keep in mind that the Canon one is even more restricted in its use. Fewer lenses, cannot couple with any other MKIII TC, etc. The Kenko and YN are usable with more lenses, and each other. I have my Kenko 1.4x and 2x still, and they do work with the 7D2 with no issues on EC, but they are an older model.

$170 for the YN 2x III vs twice that for the Canon, and some may not be concerned with having to set EC to -2 or -3 whenever they use the TC, if they have saved $170 by doing so.


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Mini-Review: YongNuo 2x III TC (Canon Knockoff)
FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses


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