Heavystar E46 vented hood on a 28/2.8mm lens?

Does the vented hood from Heavystar (seller on the bay) vignette on film with a

28/2.8mm lens? How about on a 35mm lens?

I am asking because it is designed to work on normal lenses, but in my G2

viewfinder, the vignette from the Contax hood for the Planar 45/2 is minimal.

However the hood looks really short and wide (on the bay) and I could surely use

a vented hood for the Contax G 28mm/2.8 because the Contax hood vignettes the

viewfinder too much for my liking.

Any users of Heavystar vented hoods? Any resourse for wide angle vented hoods

(46mm into filter or lens treads) know around here? Anyone around with a

Heavystar 46mm vented hood and a Contax G with a Biogon 28/2.8?

Thanks!

Just one of many reasons why I never bought Zeiss.

Stack up some filter rings without glass to make a shade.

Haven't used your specific combo, but have used Heavystar vented hoods on 35mm lenses with no problem, and on a 28mm f3.5 C/V lens without issue. All were 39mm.

If it does turn out to vignette, you could trim it down with a pipe cutter?

The Contax hood blocks too much of the VF on the G2?! The correct hood for the Biogon (GG1, same as for the 35/2 Planar) is already shallow, so I don't think your vented solution would really work because the hood, though vented, will extend even further in the VF.

Don't see what Zeiss has to do w/the problem, as VF blockage is endemic to Leicas, too.