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Thread: Tubes

  1. #1
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    Nov 2005
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    Tubes

    I've always wanted to pick up a set of extension tubes, but I've been put off by negative comments that I've read about them. Most people make it sound like their only for wedding photogs to take their ring shots!

    Not having a macro lens for the 5D yet finally pushed me over the edge and they arrived today. Its a set of Kenko tubes that I ordered off of Ebay from Hong Kong for about $120 shipped.

    I only used them for an hour or so tonight, but I must say I'm quite impressed and I wish I had picked up some of these along time ago.

    20mm of ext tubes with the 24-105 is like macro with IS!! I also used the 70-200 with a full set of tubes, which is trickier to use.

    I'll always keep the 20mm ring in my bag for use with the 24-105 when I don't want to carry a macro lens.

    Here's a few from tonight. They aren't great shots as I only had an hour or so to play with them, but I'll definitely be experimenting more with these....(all on the 5D)....








    24-105, 20mm tube, 105mm, f/7.1, ISO 200, 1/13, tripod....









    70-200, full set of tubes, 159mm, f/16, 1s, ISO 200, tripod...








    24-105, 20mm tube, 88mm, f/5, 1/30, ISO 400, hand-held, focus on center of leaf...








    24-105, 20mm tube, 102mm, f/5, 1/30, ISO 400, hand-held..(focus on pink bud)...








    24-105, 20mm tube, 85mm, f/4, 1/15, ISO 1600, hand-held....
    Michael B.
    Canon 5D2, 550D, Sony NEX 5N, Sigma 15mm fish, 24L mkI, 35L, 40mm f/2.8, 50 1.8 II, Sigma 50 1.4, Sigma 50mm f/2.8 macro, 60mm macro, 100mm f/2, 70-200 f/4, 200 f/2.8 mk I, Tamron 28-75 f/2.8, 430EX. Growing list of MF lenses!

  2. #2
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    I have to admit...

    I actually looked over my shoulder to make sure my wife wasn't in sight of the monitor before I clicked.

    Bummer.
    UPS drivers should wear red and white like Santa!!

  3. #3
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    i;d like to know who the negative comments are from. tubes rock.
    D800e l V1 l AW1 l 16-35 l 35 l 50 l 85 l 105 l EM1 l EP5 l 7.5 l 12-40 l 14 l 17 l 25 l 45 l 60 l 75
    flickr

  4. #4
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    Maybe one of you geniuses can help me understand this. I saw somewhere recently that the formula for calculating the magnification of a lens when paired with extension tubes was this:

    Magnification = Extension length / Focal length

    Is that right? This doesn't factor in the current magnification ratio of the lens being used. So if you put a 25mm extension tube on a 50mm 1:1 macro lens would it reduce the magnification to 1:2? So does it only make sense to use extension tubes with non-macro lenses?
    Lukas

    Camera: Anonymous
    I could tell you but I wouldn't want you to get all pissy if it's the wrong brand

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  5. #5
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    i dont know the formula but putting exten tubes on a macro lens gives you larger than life size results. a full set of tubes on a macro lens significantly increases your magnification. i just dont know how to work out the numbers.
    D800e l V1 l AW1 l 16-35 l 35 l 50 l 85 l 105 l EM1 l EP5 l 7.5 l 12-40 l 14 l 17 l 25 l 45 l 60 l 75
    flickr

  6. #6
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    The maths works out like this

    Each lens at a given focal length has a fixed magnication, to which you have to add the extension tube length / the focal length

    for a 50 mm lens with a magnification of say .5, if you add a extension tube the total magnification becomes .5 + (25/50) = 1
    flickr
    dcrp shooter's on flickr

    7D,Bge7,Canon 70 200 F4L IS,Canon 17 40 f4L,Canon 100 2.8 Macro,Canon 400 5.6L,580 EX II,Tamron1.4XTC SP AF

  7. #7
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    Thanks drama that makes much more sense.
    Lukas

    Camera: Anonymous
    I could tell you but I wouldn't want you to get all pissy if it's the wrong brand

    Flickr

  8. #8
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    Quote Originally Posted by Rooz View Post
    i;d like to know who the negative comments are from. tubes rock.
    I've always heard people say that tubes were a pain to use and focusing was very difficult with them, etc, etc.

    I had no problems with them however; I even used AF with most of these shots in order to obtain initial focus, without a problem. Once focus was achieved, I then switched to MF so the camera wouldn't keep trying to reacquire focus.

    The only thing that was a little tricky was using the full set of tubes on the 70-200, only because the set-up was so long that it was a little unsteady. I had to wait for it to stop shaking before I took the shot (using MLU as well).

    I would admit though that using this set-up to shoot moving subjects like bugs would probably be very difficult, but for the stationary objects that I like to shoot it works like a charm.


    Quote Originally Posted by JMWallace View Post
    I have to admit...

    I actually looked over my shoulder to make sure my wife wasn't in sight of the monitor before I clicked.

    Bummer.
    Now you sound like me.

    My wife was commenting last night about all the boxes that have been arriving lately.
    Last edited by michaelb; 05-06-2008 at 06:21 AM.
    Michael B.
    Canon 5D2, 550D, Sony NEX 5N, Sigma 15mm fish, 24L mkI, 35L, 40mm f/2.8, 50 1.8 II, Sigma 50 1.4, Sigma 50mm f/2.8 macro, 60mm macro, 100mm f/2, 70-200 f/4, 200 f/2.8 mk I, Tamron 28-75 f/2.8, 430EX. Growing list of MF lenses!

  9. #9
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    Dallas, Texas
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    weird. i was looking at extension tubes just the other day.

    don't really have a need for them...except for the occasion ring shot haha.
    40d | 5d mk II | 2.8/16 zenitar fisheye | 16-35L | 35L | sigma 1.4/50 | sigma 2.8/50 Macro | sigma 1.4/85 | 70-200L IS
    website
    disclaimer: posts are for personal entertainment only...not to be taken seriously...ever.

  10. #10
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    Quote Originally Posted by michaelb View Post
    My wife was commenting last night about all the boxes that have been arriving lately.
    I had my most recent lens purchase shipped here at work No boxes, not questions LOL

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