Read this http://www.flickr.com/groups/canon100mm/discuss/72157604285706304/

http://www.amazon.com/Kenko-Extension-Tubes-Digital-Cameras/dp/B000U8Y88M/ref=pd_vtp_p_18

Hi

For what it's worth I thought I'd share this, I bought these from Amazon and they seem to do the same thing at a fraction of the cost.  I know they probably don't do it in exactly the same way but may be worth a purchase to see how you get on before committing to the full cost of those?

Any way here's the link.

http://www.amazon.co.uk/gp/product/B003Y60DZO

Good luck

Dave

Is there a reason to purchase both extension tubes?  Or do most people just purchase one of these if they want them?

I would get both, matter of fact I did.  Sometimes the 12mm will give you what you want, other times the 25mm.  I do use them with prime lenses though.  They will work with most zooms but I much prefer using prime lenses with extension tubes.

Are they capable of stacking together?

Yes, they do and I've used them that way.

Quote from: dave on January 25, 2012, 04:36:03 PM

Hi

For what it's worth I thought I'd share this, I bought these from Amazon and they seem to do the same thing at a fraction of the cost.  I know they probably don't do it in exactly the same way but may be worth a purchase to see how you get on before committing to the full cost of those?

Any way here's the link.

http://www.amazon.co.uk/gp/product/B003Y60DZO

Good luck

Dave

Thanks Dave, I really do appreciate the info.  I've been reading a lot about some off brand type of tubes and trying to see what would be the best bet.  Thanks again!

I originally purchased Kenko tubes but when I received them I found out they don't have the contacts to allow the lens to communicate with the camera.  B&H gave me an RMA and I ordered the Canon 12 and 25mm tubes.  While you can work without the electronics it makes things so much simpler staying "within the system".

Here's a pic I took of my 5 week old Daughters eye with the tubes I got.

I agree no Camera Data is recorded but it still works.  You need a very sturdy tripod to get a good pic.
It did work in movie mode too but you have to start in a manual mode first then switch over to movie.  Otherwise it asks you to attach the lens.



Thought I'd share.

Thanks

Dave

Thanks BBalzCO

Took me ages to get this shot, every time I got her in focus she moved, lol, 

Guess you can't tell a 5 week old to hold still whilst Daddy holds a camera 2" from your face to take a picture, lol.

Dave