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Macro extension tubes

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Old Saturday 17th December 2016, 11:49   #1
John In Ireland
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Macro extension tubes

I have been dabbling with some cheap extension tubes I had for ages. I recently tried them with my Canon 100-400 and was quite happy with some results. I see now that some of these extension tubes come with electrical contacts that allow auto focus and aperture etc. Has anyone tried them and are they any good. They come at quite a reasonable price which makes me wonder.
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Old Saturday 17th December 2016, 18:17   #2
Vernon Barker
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Yes John, I have used a very basic set (made in Poland) on my Canon 100-400 zoom for getting close ups of dragonflies and they work perfectly. They are made of plastic so they will probably wear out quicker than aluminium ones but for occasional use they are OK.
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Old Saturday 17th December 2016, 19:06   #3
John In Ireland
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Do yours have the electrical contacts Vernon to enable AF etc.?
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Old Monday 19th December 2016, 18:38   #4
Vernon Barker
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Yes they did.
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Old Monday 19th December 2016, 19:21   #5
Graham Osborne
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I Have a set of Kenko tubes for Canon which work fine.
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Old Tuesday 20th December 2016, 10:35   #6
John In Ireland
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Ah that's good, thanks for that Vernon. Hi Graham, do the Kenko ones have a metal or plastic body? I read somewhere that the little screws holding on the connection plates to the body screw into plastic and some folk have experienced the whole lens pulling away. Don't know if this is a common problem though.
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Old Tuesday 20th December 2016, 17:55   #7
Graham Osborne
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The bodies are indeed plastic but the mounting rings at either end are metal. I suspect that there is a risk of the fixing screws coming loose but this would only seem to be likely if you were to let a heavy lens hang off the end (which I am sure is not recommended!) With proper care I don't think you should have a problem with them.
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Old Wednesday 21st December 2016, 19:39   #8
Vernon Barker
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The only advantage of the plastic rings is that if you drop the lens and camera (as I did once) then the cheap plastic breaks rather than the expensive metal on the lens and camera.
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Old Monday 20th February 2017, 17:39   #9
outnabout
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Used the Kenko tubes for years great set, no issues whatsoever.
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