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  1. #1
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    Extension Tubes - Full Disclosure

    Ok, I've been talking about tubes ever since joining PR and have posted some real-world examples in this forum.

    So here are some test examples which I hope you find helpful. I thought pencils would be a good universally recognizable (and stationary ) subject.

    Since there are so many variables, the following will remain unchanged throughout:

    Lens: 70-200 f/2.8L IS
    Aperture: f/8
    ISO: 200
    Focus: manual (rack focusing) at minimum lens setting
    Metering: AV
    Mirror Lockup: enabled
    Shutter Release: remote
    File Capture: RAW
    Post Processing: None except resize and convert to JPEG (no cropping)

    The setup:
    Attached Thumbnails Attached Thumbnails Extension Tubes - Full Disclosure-set-up.jpg  
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  2. #2
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    1st Example

    Images with NO extension tubes.

    Left to Right:
    70mm @ 112cm working distance (subject to front of lens)
    135mm @ 112cm working distance
    200mm @ 112cm working distance
    Attached Thumbnails Attached Thumbnails Extension Tubes - Full Disclosure-extension-%3D-0-mm.jpg  
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  3. #3
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    2nd Example

    Images with 12mm extension.

    Left to Right:
    70mm @ 29cm working distance (subject to front of lens)
    135mm @ 62cm working distance
    200mm @ 81cm working distance
    Attached Thumbnails Attached Thumbnails Extension Tubes - Full Disclosure-extension-%3D-12-mm.jpg  
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  4. #4
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    3rd Example

    Images with 20mm extension.

    Left to Right:
    70mm @ 18cm working distance (subject to front of lens)
    135mm @ 48cm working distance
    200mm @ 70cm working distance
    Attached Thumbnails Attached Thumbnails Extension Tubes - Full Disclosure-extension-%3D-20-mm.jpg  
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  5. #5
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    4th Example

    Images with 36mm extension.

    Left to Right:
    70mm @ 8cm working distance (subject to front of lens)
    135mm @ 33cm working distance
    200mm @ 56cm working distance
    Attached Thumbnails Attached Thumbnails Extension Tubes - Full Disclosure-extension-%3D-36-mm.jpg  
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  6. #6
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    5th Example

    Images with 48mm extension.

    Left to Right:
    70mm @ 5cm working distance (subject to front of lens)
    135mm @ 27cm working distance
    200mm @ 48cm working distance
    Attached Thumbnails Attached Thumbnails Extension Tubes - Full Disclosure-extension-%3D-48-mm.jpg  
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  7. #7
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    6th Example

    Images with 56mm extension.

    Left to Right:
    70mm @ 4cm working distance (subject to front of lens)
    135mm @ 23cm working distance
    200mm @ 45cm working distance
    Attached Thumbnails Attached Thumbnails Extension Tubes - Full Disclosure-extension-%3D-56-mm.jpg  
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  8. #8
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    7th Example

    Images with 68mm extension.

    Left to Right:
    70mm @ 2cm working distance (subject to front of lens)
    135mm @ 20cm working distance
    200mm @ 40cm working distance

    Remember, changing the focus on the lens at any time will also affect the working distance and magnification. The bottom image is still with the 68mm extension at 200mm, except now the focus on the lens is set to infinity. Working distance has now increased from 40cm to 62cm. The magnification is now about the same as it was when only the 36mm tube was used with the lens set at the mininum setting.
    Attached Thumbnails Attached Thumbnails Extension Tubes - Full Disclosure-extension-%3D-68-mm.jpg  
    Attached Images Attached Images  
    Last edited by Loupey; 06-10-2006 at 01:34 PM.
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  9. #9
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    Final Version

    200mm with 48mm extension.

    Slightly off perpendicular (sharpened pencil is out of DOF), angled, and post processed with PS.

    This is the final example. Hope this helps demonstrate the flexibily that these things offer and why I love 'em so much :thumbsup:
    Attached Thumbnails Attached Thumbnails Extension Tubes - Full Disclosure-final-product.jpg  
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  10. #10
    Learning more with every "click" mjs1973's Avatar
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    Re: Extension Tubes - Full Disclosure

    Thanks for the demenstration Loupey! That must have taken some time to do all that and it's much appreciated!

    What focusing rail are you using?
    Mike

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    "I thought that because fewer wolves meant more deer, that no wolves would mean hunters' paradise. But after seeing the green fire die, I sensed that neither the wolf nor the mountain agreed with such a view."
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  11. #11
    Senior Member Knight's Avatar
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    Re: Extension Tubes - Full Disclosure

    Thanks for clearing things up Loupey , now all i want is to C what they look like How about electrical contacts or do you have to go all manual with these ?
    Nikon Samurai # 24

    ( The hiker's creed. )

    Take only pictures, Leave only footprints, Kill only time.


  12. #12
    Ex-Modster Old Timer's Avatar
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    Re: Final Version

    Very nice demonstration. Thanks for the time and trouble.
    Don't forget about the Gallery. Are your photos there??


    Nikon Samurai #13

    "A photographer is known by what he shows not by what he throws. The best photographers have the biggest trash cans." Quote from Nikon School sometime in the early 1970's.

  13. #13
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    Re: Extension Tubes - Full Disclosure

    Quote Originally Posted by mjs1973
    Thanks for the demenstration Loupey! That must have taken some time to do all that and it's much appreciated!

    What focusing rail are you using?
    No problem, Michael! At first, I was going to show the corresponding magnifications/working distances with the focus at infinity for all extensions, but that was just too many combinations

    I thought you were going to ask me to do the same set of examples with my 2x TC. One set with the TC in front of the tubes and another set with the TC behind the tubes!

    I have a Contax focusing rail that I bought at a second-hand dealer in Canada a few years back. It was actually part of a bellows kit. I negotiated a lower price just for the rail as I didn't need/want the bellows. I don't know how the dealer was going to sell just the bellows to someone else I don't use it in the field but it works great in a controlled setting.
    Attached Thumbnails Attached Thumbnails Extension Tubes - Full Disclosure-focusing-rail.jpg  
    Last edited by Loupey; 06-10-2006 at 09:37 PM.
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  14. #14
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    Re: Extension Tubes - Full Disclosure

    Quote Originally Posted by Knight
    Thanks for clearing things up Loupey , now all i want is to C what they look like How about electrical contacts or do you have to go all manual with these ?
    The electrical contacts allow full communication (even through all 3 tubes) between the body and the main lens. Even internal stabilization capability is preserved. Still, I shoot manual focus anyway.
    Attached Thumbnails Attached Thumbnails Extension Tubes - Full Disclosure-tubes-1.jpg   Extension Tubes - Full Disclosure-tubes-2.jpg  
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  15. #15
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    Re: Final Version

    Quote Originally Posted by Old Timer
    Very nice demonstration. Thanks for the time and trouble.
    Your welcome! Just here to give (hopefully) wanted advice, demonstrations, and examples. I know you already shoot fantastic macro work, but I wanted to show that there are different ways to skin a cat. I'm all for using existing equipment to its full capabilities and knowing just how far they can be pushed :thumbsup:
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  16. #16
    Senior Member Knight's Avatar
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    Re: Final Version

    Thanks for all the info Loupey
    Nikon Samurai # 24

    ( The hiker's creed. )

    Take only pictures, Leave only footprints, Kill only time.


  17. #17
    K9er Bevb's Avatar
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    Re: Extension Tubes - Full Disclosure

    Yes thanks greatly for this Loupey, your time and effort on this is appreciated, its really shown these tubes full potential, and its good to actually see one. Iv looked around here for these but only come across very limited sizes in Canon, any suggestions on manufacturers/suppliers. regards.

    www.bevbarkerphotos.com
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    "Live Life to the full, theres no rehersals"
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  18. #18
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    Re: Extension Tubes - Full Disclosure

    Quote Originally Posted by Bevb
    Yes thanks greatly for this Loupey, your time and effort on this is appreciated, its really shown these tubes full potential, and its good to actually see one. Iv looked around here for these but only come across very limited sizes in Canon, any suggestions on manufacturers/suppliers. regards.

    www.bevbarkerphotos.com
    www.k9imageworld.com
    Yeah, not the subject you were expecting, eh ?! Canon only makes 12mm and 25m tubes and each costs about $180US/each. Must have gold in them.

    I paid $180 for the set of 3. It is labled for the camera dealer network in my region but I think it is manufactured by Tokina. The Kenko tubes seem highly recognizable in these forums.
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  19. #19
    K9er Bevb's Avatar
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    Re: Extension Tubes - Full Disclosure

    Yes thanks Loupey have found info on this now. regards.
    "Live Life to the full, theres no rehersals"
    www.bevbarkerphotos.com
    www.k9imageworld.com

  20. #20
    Member SpeedingSphere's Avatar
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    Re: Extension Tubes - Full Disclosure

    These are fantastic tubes, and you've showed a wonderful demonstration of their ability.

    Should be a sticky in the Camera Equipment section. or a review on the home page. Good Job!
    -Mike
    -------------------------------------------------------
    | Canon EOS 40D | Canon EOS 350D
    | Canon EF 70-200mm F/2.8L IS | Canon EF-S 10-22mm F/3.5-4.5
    | Canon EF 28-135mm F/3.5-5.6 IS | Sigma 8mm EX DG Circular Fisheye
    | Sigma 30mm F/1.4 EX DC HSM

  21. #21
    Nature/Wildlife Forum Co-Moderator Loupey's Avatar
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    Re: Extension Tubes - Full Disclosure

    Quote Originally Posted by SpeedingSphere
    These are fantastic tubes, and you've showed a wonderful demonstration of their ability.

    Should be a sticky in the Camera Equipment section. or a review on the home page. Good Job!
    Thanks, SS. Knowing that you recently purchased your Kenko tubes, I was hoping that you would chime in with your thoughts on them

    I recall only seeing a few shots that you took with the tubes on your beloved 400mm. Do you have any more that you can post in this forum? Love to see what you've got.
    Please do not edit or repost my images.

    See my website HERE.


    What's a Loupe for anyway?

  22. #22
    Member SpeedingSphere's Avatar
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    Re: Extension Tubes - Full Disclosure

    I havnt used them much yet, but look out, youre going to get plagued once I come back from bermuda. studying for school finals this next week, so you wont hear much from me, and then the week after, bermuda, so figure a wait of about 2 weeks.

    I cant wait for this trip. The trip is why i bought a monopod, L glass, extention tubes, camcorder, and some other stuff. I'm sooooo excited!

    :-)
    -Mike
    -------------------------------------------------------
    | Canon EOS 40D | Canon EOS 350D
    | Canon EF 70-200mm F/2.8L IS | Canon EF-S 10-22mm F/3.5-4.5
    | Canon EF 28-135mm F/3.5-5.6 IS | Sigma 8mm EX DG Circular Fisheye
    | Sigma 30mm F/1.4 EX DC HSM

  23. #23
    K9er Bevb's Avatar
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    Re: Extension Tubes - Full Disclosure

    I have now ordered my set of Kenko tubes and cant wait to have a play with them, and they were so reasonably priced to! (47) thanks Loupey for bringing these to my attention and for a fantastic thread on them.

    Speeding Sphere, Woe sounds like a trip of a lifetime! have a brill time and look foward to some pictures on your return.

    www.bevbarkerphotos.com
    www.k9imageworld.com
    "Live Life to the full, theres no rehersals"
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  24. #24
    nature/wildlife co-moderator paulnj's Avatar
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    Re: Extension Tubes - Full Disclosure

    Now this is a STICKY without a doubt!

    You've done great !
    CAMERA BIRD NERD #1




    BIRD NERD O'CANON

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  25. #25
    Captain of the Ship Photo-John's Avatar
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    Excellent!

    Loupey-
    This is an excellent, excellent post! Thanks a lot for making it. I'm sure it's very useful to lots of people. And it reminds me that we need a place for this kind of thing so that it can be easily found. I'm not sure how to go about doing that yet, although there has been talk of a photo tips forum.

    In the meantime, I checked the reviews and although the Kenko tubes are listed, I could find no review from you! So please post one for us. Here's a link to that review page: http://www.photographyreview.com/cat...3_3132crx.aspx

    Thanks - this is awesome. I love it when people take the time to make something really useful like this post. :thumbsup:
    Photo-John

    Your reviews are the foundation of this site - Write A Review!

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