Canon 25mm Extension Tube II Worth the $$$'s?

Discussion in 'Photography Beginners' Forum' started by smackitsakic, Apr 13, 2010.

  1. smackitsakic

    smackitsakic TPF Noob!

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    I am still new to this photography business.

    That being said, I'm really wanting something that will let me get some nice close flower shots this summer.

    I have done some small research on extension tubes and have concluded that cheap extension tubes off of ebay aren't for me.

    That being said, can somebody with a Canon 25mm Extension Tube II explain to me its benefits? Can you explain to me exactly what this extention tube provides (don't know much about it)? Can you also speak to whether the $$$'s are worth or, or is it better to get a Kenko set of three extension tubes?

    All of my gear is Canon and I love it, but am stuck on what to do with extenstion tubes.

    Any help would be great:)
     
  2. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    I honestly don't know the difference between a Canon and a Kenko (for example) extension tube. I guess there might be a quality difference, but an extension tube is a very simple device, with no optical elements....so there isn't a lot to consider about the quality.

    I would think that Kenko tubes would work just as well as Canon tubes.
     
  3. c.cloudwalker

    c.cloudwalker TPF Noob!

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    I got one of the cheap ones off ebay and it works just fine. Got just the one tube to get me to 1:1 and it cost only $25.

    Of course, with mine, everything is manual but that's what I use anyway so it's no big deal to me.
     
  4. ghache

    ghache TPF Noob!

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    I just ordered some off ebay for 7 bucks.

    there have no lens contact.
    manual focus and manual ap.

    i am still waiting for the package. if there are **** then 7 bucks is not that bad of a lost to give it a try.
     
  5. dyyylan

    dyyylan TPF Noob!

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    I'm actually still waiting on mine as well, China must be a looooong way away :/
     
  6. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

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    There are generally three levels of extension tube on the market:
    Cheap ebay tubes; these are very cheap and often made of lighter materials. They are overall not too bad provided you don't put them under too much strain, however they lack metal contacts and that makes all the difference. Without the metal conctacts you lose auto focus, auto metering and also (most importantly) the ability to control your lenses aperture settings. That means you have to shoot wide open for every single shot.

    Kenko tubes; about the most cost effective tubes, you get 3 in a set (like the above) but you also get the metal contacts so that you retain full control over the lens and most importantly the aperture blade controls.

    Canon/nikon tubes; Most consider these highly overpriced for what you get. They are generally more sturdy in construction than the others, but unless you are mounting 400mm f5.6 or heavier leneses and coupling that with poor holding technique chances are you won't notice any difference at all.

    for all since they are just adding distance between the lens and the camera body the optical quality of each is identical for the same length of tube used.
     
  7. ghache

    ghache TPF Noob!

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    if the lens have a max aperture ring? you can use it to control your aperture right? am i wrong?
     
  8. dyyylan

    dyyylan TPF Noob!

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    You're right :thumbup:
     
  9. ghache

    ghache TPF Noob!

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    nice, cheap tube wont be a problem then,
    for 7 $ and manual focus, thats not bad at all
     
  10. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

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    You can use the ring to select the aperture you want however you might still have problems since you still have to open/close the blades to that aperture that is set on the barrel. If you have a manual blade control on the lens then yes you have no problems save for a moment or two before you shoot where you have to move the blades.
     
  11. Ron Evers

    Ron Evers Been spending a lot of time on here!

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    I use the cheap ebay tubes with legacy lenses & set the aperature & focus on the lens. I have a set for Minolta mounts & a set for Pentax mounts & the camera meters & sets the shutter speed.
     
  12. gryphonslair99

    gryphonslair99 Been spending a lot of time on here!

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    :thumbup: The Kenko tubes work just as well, cost less and have full electrical communication between lens and camera body. For AF not a real issue since I find it easier to manually focus for macro. But for metering/exposure it is nice having full aperture control.
     

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