Canon VS Kenko Extension Tubes

I already have the Kenko Extension Tube DG Set (12mm, 20mm, 36mm) but am a little unhappy with how they feel when they go on a lens. They seem to grab a lot more and almost grind against the lens and against the body when they are being put on. So I am thinking of selling these and getting 2 Canon EF25 and one EF12 instead but I have two questions first:

1. Does anyone else who has the Kenko set experience the same thing with the "grippyness"?
   
2. Can anyone with the Canon EF12 or EF25 Mark I or II verify that the Canons go on as smoothly as any other Canon lens?

I thought the main complaint would be that they go on loose. Are you hurting the lenses or camera with your Kenkos? I doubt it. Why change? Yes, Canon are built better and work well, go on smoothly, etc.

gasrocks wrote in post #4527476
I thought the main complaint would be that they go on loose. Are you hurting the lenses or camera with your Kenkos? I doubt it. Why change? Yes, Canon are built better and work well, go on smoothly, etc.

I dont know, I guess Im just anal with my camera equipment and its bugging me every time I put those tubes on one of my lenses. I dont understand it. The surface is is brand new and PERFECTLY clean and clear but they still grab and grind. It must be just due to cheap materials or something.

Can you discern any wear/scrapes/scratches on your camera or lens mounting surfaces as a result?

Hmm.. I've been deciding on the two as well and understood that the Kenkos were looser. Grippy is good. Keeps the lens from falling off.

I've had two sets of Kenko's, one a little loose and one a little tight. They've both been replaced by EF12's and EF25's. The Canon ones feel good...just like the lens to camera connection.
I'm sure others will disagree but I'm much more confident in the Canon ones.

I'm not the only person to have concerns https://photography-on-the.net/forum/showthre​ad.php?t=186161

Bob

In the end, they are just tubes with no optics. You aren't going to be panning with extension tubes or anything that would cause the lens to hurtle off. If you feel like being pedantic, spend more of your money on Canon tubes, if not, stick with the Kenkos.

Not really worried about the lens falling off as these are definitely on there tight and not loose at all, I just dont like how they feel grinding against the lens and body...

runninmann wrote in post #4527591
Can you discern any wear/scrapes/scratches on your camera or lens mounting surfaces as a result?

No, nothing like that. Yet anyway.

ben_r_ wrote in post #4528040
Not really worried about the lens falling off as these are definitely on there tight and not loose at all, I just dont like how they feel grinding against the lens and body...

That's what is called friction. Sorry couldn't resist.

asylumxl wrote in post #4528101
That's what is called friction. Sorry couldn't resist.

Yea and I probably deserve that for being overly nit picky... I dont know if you own or have ever tried the Kenkos before but they are def WAY different feeling going on than a nice Canon lens is.

ben_r_ wrote in post #4528217
Yea and I probably deserve that for being overly nit picky... I dont know if you own or have ever tried the Kenkos before but they are def WAY different feeling going on than a nice Canon lens is.

I'm a bit of a functionalist, if it does the job I'm happy with it. Probably just the finish of the metal that does it.

i try both of them and end up with the kenko. just couldn't see spending more money on something that work the same and use the same air . granted the canon one feel nicer but it's just a spacer to me.

Bill

I have tried the thin Canon tube (sorry can't recall the size). I also bought the Kenko set. To me, even the Kenko tubes seem too expensive, but looking at them perhaps they are worth their price.

The lens fits perfectly and safely. I can even accept mounting the heavy 500/4 on a tube to reduce MFT.

The Canon tube felt heavier and heftier. It did exactly the same job but cost almost twice or more.

If it fits well and doesn't grind the lens mount or the camera mount, then I would say, they are the perfect fit.