It is not the front ring the problem that one is indeed accessible by both canon and ikelite
Is the rear ring that is not implemented so if you want to shoot in manual or use the wheel for exposure compensation you need to do additional 3 button presses to change the front ring to the required setting
---------- Post added April 24th, 2012 at 10:28 PM ----------
Actually just to clarify my position on the ikelite vs canon I personally would buy the canon for this simple reason
Ikelite housing with 67 mm thread + Inon UWL-H100 28M67 = $845
Canon WP-DC43+Inon LD mount+ Inon UWL-H100 28LD = $835
You spend $10 less and you have included
1. a bayonet mount instead of thread very useful for swapping lenses in water considering that the Inon UWLH100 are 370 grams negative in water
2. The inon mount for the DC43 has a cold shoe for a focus light that saves you extra money and potentially makes the camera good enough for macro without any strobe
So with the canon housing and inon mount you can take macro just using a half decent focus light and wide angle with manual white balance
Negative:
1. the canon housing only goes to 40 meters. Wow when did you last take a good picture below that depth??
2. Ikelite has got great customer service, that is true but you can actually breakdown the whole canon housing and even replace the button orings if you know how to
---------- Post added April 25th, 2012 at 06:14 PM ----------
But yes there was a type in my previous post, both ikelite and canon access the front ring and NONE of them access the rear wheel
I put my suggestions around canon vc ikelite somewhere else