As a second almost as good if not better option, consider the lowly Kalt 49mm black metal screw-in shade with a 48-49mm step-up ring. This combo results in a deeper (and thus darker) recess for the lens and surprisingly does not vignette whatsoever - at least when mounted without a filter between it and the lens. I can confirm this from personal use.
It also looks really cool on QL17, which as everyone knows results in much improved compositions...
Also, the comments by 'Bill Burk' regarding hoods and meter readings are dead on, and should be heeded if you intend to rely on the internal meter for outdoor daytime exposures. Meter readings on my QL17 vary widely for the same scene with and without a hood.