i have sony hdr xr500e with 37mm thread and want to buy the brevis bundled package with the flip module. juz wanna ask, for the option do i need to order the non-flip 72mm achromat? i'm not very sure coz the article stated the bundle includes the Brevis35 HD Imaging adapter, flip module, microprocessor controlled charger/AC adapter, watertight ABS case, and "our class-leading HD 72mm achromat". i'm a bit confuse here...what about the step up ring? in the option there's no step up for 37mm & 58mm(also like to have the bundle for my canon HFS11) do i need to order the step up rings separately?