Product Description

On most lenses,that manufacturers provides a focusing mechanism that extends only a few millimetres, partly to keep down cost and also to restrict the lens to extensions for which its optics are optimised. To provide additional extension,you can add one or more extension tubes between the camera and the lens, to make the lens focus at closer distances and it can produce higher magnification. When using the extension ring with a Canon body, the camera should be set in the M mode.The macro extension tubes is fit for the Canon EOS cameras including 1D,1Ds,5D,10D, 20D,30D,40D,300D, 350D,400D, 450D, or any canon SLR Use this set,it will not downgrade the optical quality of your lens. Sharpness and Saturation can be still maintained. But they are not meter-coupled. They do not preserve the automatic diaphragm. It should be used with manual lenses with their own aperture dial. There is no electronic connection between the body and the lens. Automatic lenses can be used with their widest open aperture only. Package Includes: One macro tube set.

Product Details

• Amazon Sales Rank: #1140 in Consumer Electronics
• Colour: black
• Brand: BV & Jo
• Dimensions: .44 pounds

Features

• This Macro Extension Tube Set for Canon EOS film & Digital SLR,
• it includes 3 extension tubes - 9mm, 16mm, 30mm adapters and a male & female adapter.
• You can mount the tubes between lens and camera body to get your choice of macro ranges.
• Totally it is 8 combinations. They fit directly to the body of the camera without the other adapter.
• just place it on the body of the camera as the lens and put the lens on tube.

Customer Reviews

Sceptical no more!
I must admit that I bought these very much on a 'at this price I'm prepared to take a chance' approach. The optical principle is sound - you push the lens away from the camera and it allows you to focus a lot closer.

I was highly dubious about what the actual result would be. Astonishingly enough, I needn't have been! It does exactly what it says on the tin, and using my bog-standard 18-55 Canon lens I've focussed about 20-30mm away from the face of the lens.

You lose the autofocus and some of the other automatic bells and whistles, but it's not really an issue with such close work. Just whack it into Av mode and you're away.

Couple of caveats, but it's nothing to do with this product - just macro stuff in general. You're working very close and dealing with not a lot of light - you really need to use a tripod. Also you're dealing with the world's shallowest depth of field - it has to be seen to be believed!

So yes, these things really do work and if you don't want to shell out on a 'proper' macro lens then this is a perfectly viable alternative for infrequent use. A worthy addition to anyone's kit bag.

Extension tubes depth of field
You can get a better depth of field with these tubes if you set the desired aperture on the lens before removing it from the camera and fitting the tubes. Press the DOF preview button on the camera and hold the button in whilst removing the lens from the camera. The aperture of the lens will be locked and will remain at that setting whilst shooting through the tubes.

...and you know what? It really works !
First off don't tell the wife how much you paid. Show the credit card statement or you'll get the prepared lecture titled "One small lie leads to another "and next thing you know you have the silent treatment and your shirt collars phorensically analysed. Speaking of which she could even use your new tubes and your bog-standard kit lens to do the job. Because horror of horror it all works beautifully.

So what's in the box? It starts with the male shoulder, machined to Swiss tolerance, whilst noting it was born in Beijing (or possibly Soeul). The unit fits the Canon female exactly and smoothly twists to rest.
Next we have three concentric barrels badged one, two but no three and each exactly twice the depth of the preceding one. Little squeaky on the twist action, but the lock with authority. Last is the outer collar replicating the female Canon dock into which you insert your (lens) shaft.
Important learning point ( as the packaged instructions are a feedback guide in finest ChineEnglish...) practice the locking of both ends carefully, it's not immediately obvious but if you force it, these lock firmly enough to threaten damage.
The shoulder is generic SLR and marked with a red-dot to make the exercise Childs play. The outer collar shows where the money was saved and releases by simply pulling back the spring-loaded pin - easy once you know.

And it works, you can scarcely believe it but it works. Because it's back to basic physics and not the proton variety. As "Comedynose" said, however you do it, the further you separate lens from sensor the more intimate you get with the subject. Your humble 18-55 quickly becomes a decent 300 or microscope, depending on how many of your new tubes you deploy. Photograph your favourite arachnid or surgically snip his future family tree. You have enough detail for either.
Machined from matt painted light alloy, it will eventually scuff if you don't take care but look at what you've saved. Buy another for a spare or get really clever by multiplying the magnification (and the time spent messing with the focus to the same degree) from your own combination of rings.

What's wrong apart from being brutally anonymous is only YOUR attitude.
We've all gone from Heath Robinson buffers bumbling about in darkened sheds, to hello Hokkaido wielding all manner of suddenly not-so-expensive digital delights. But if you are a "snapper" as opposed to a compact (with your head crazily angled a foot away from the preview screen) then the art of fumbling with your own shortcut creations is never lost and therein lies the essence of this set. You lose all your electrics, but so what. You didn't shell out for an SLR just to stick into auto........did you?

Buy, laugh and share a frothy Old Speckled Hen lauding over the results.