So to net-out.. the results were great.. better than I expected.
How does it compare with other equipment?
If you compare with a manual extension tube (that's the price-point), it is thousand times better.
Nope: Price now bumped to $43 which makes it half of other Auto Focus Extension Tubes. I would then recommend manual extension tubes :).
You can use any lens with this and don't have to pre-set the aperture. You can even take advantage of the auto focus at lower magnification. Lastly, if you use Magic Lantern, since the electronics are connected, you can even use "trap focus" feature even when auto-focus is turned off.. which makes it ideal for even tiny subjects.
More about "trap focus" feature in later tutorials.
If you have to compare this with dedicated macro lens, well don't since at $9 (Edit: $43 now!!) you won't get any macro lens... but wait.. there is more to it. With standard macro lens you can reach only 1:1 (barring the 5:1 lens like MPE65), where as you can reach 1:1 and beyond easily with this inexpensive hack while maintaining the clarity of a 50mm lens.. that's awesome when you count that even auto-focus works.
I am going to definitely recommend this one to anyone who is starting off into macro.
Does that mean I will shift to this from my 70-300 + Raynox combination?
Well, NO. For one simple reason, for changing magnification, I still need to add / remove the extension tubes which is not very convenient on the field. That said, I will start using it more often than my manual extension tubes / bellows for sure.
I will leave you with two more Images which are my favorites from the shoot on Saturday. Note that I got more magnification at lesser focal length (most probably since the minimal focal distance is lower at lower focal length.. something to ponder on in another tutorial)