I'm not familiar with that particular lens setup.
I used to use this setup. I would remove the 1.25" adapter from the end (this adapter is just so handy for screwing into female T threads on a whole range of camera accessories and cameras, I'd be lost without it) drop a narrow barrel eyepiece (the old silver top celestrons are great. Just the right size and not bad for quality either) down the center of it and then secure it by using the bottom screw. The whole thing would then thread onto a T thread in your telescope and the other end onto the T Adapter of your camera. The other two screws on the barrel allow you to adjust the length of the adapter which varies the magnification, even using the same eyepiece.
It is fantastic for starting out DSLR imaging on the moon. You can get some seriously rediculous focal lengths using this technique. If you use a 10mm eyepiece and extend the adapter out to it's full length you might end up with somewhere around 125mm distance between lens and chip, this equates to a focal length of around 6.9 meters and an equivalent magnification of 690X. This is way beyond the resolving power of your objective but it gives you an idea of what you can achieve. Using this adapter, a 20mm eyepiece and your ED80 you could expect to achieve Focal lengths of approximately between 1.5 and 3.1 meters (it depends on how close you can get the eyepiece to the chip) and magnifications of between 75X and 155X. Upping it to a 15mm eyepiece and you end up with between 2.2 and 4.4 meters and magnifcations of 110X and 220X. Pretty good magnifications for the moon and within the range of your objectives resolution.
Check out this thread for some of my earliest work 
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