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Ridiculous and totally crazy!
Posted By: Ouroboros, 07-18-2010, 01:49 AM

OK, I'm sure a couple of you out there may want to slap me for this but I wanted to find out how far I could extend macro tubes before the results were no longer usable.

I've asked on the forum before and many people were very helpful in providing me with the necessary equations to work out the magnification. I wanted to know what the real-world usable maximum was. So I got my scissors and tape, collected a bunch of toilet paper rolls and made the most stupid length tube I could, using my existing 50mm of tubes as mounts.

I know the construction sucks, they're not perfectly straight and there was light leaking in but screw it! I got the results I wanted and now I'll go buy the proper tubes for the length I want! The total length of my ridiculous construct is about 15 inches (mount to mount) and working distance from the lens was the same as usual at about 2 inches.


Here are the results!

In case you're wondering, those are my fingerprints! There is a slight blur because if you move even a micron, it shows.... You're heartbeat is enough to move you a micron.

The last shot is the mm of a ruler

Last edited by Ouroboros; 04-03-2011 at 08:36 PM.
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07-28-2010, 08:35 PM   #16
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I have used a full set of extension tubes, a fully extended bellows, and a macro focusing teleconverter fully extended and a 28mm lens reversed on one occasion. I had to light the subject with 2 Sunpak 522 flashes at full power to get an acceptable exposure of the head of a pin. You could see the pits in the metal.

07-28-2010, 09:22 PM   #17
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Brilliant! I love the DIY approach. Very inspiring. I may try something similar.
08-09-2010, 04:51 PM   #18
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OP! Sweet shots! I wonder if I could peek at my turntable styli with this method...


QuoteOriginally posted by sawtooth235 Quote
I have used a full set of extension tubes, a fully extended bellows, and a macro focusing teleconverter fully extended and a 28mm lens reversed on one occasion. I had to light the subject with 2 Sunpak 522 flashes at full power to get an acceptable exposure of the head of a pin. You could see the pits in the metal.
I kind of really want to see that--both the setup AND the results!
08-09-2010, 06:13 PM   #19
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Cool shots

I didn't know that was even possible. Awesome shots. Thanks for the ideas....

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