i dont know what test footage you looked at but this was entirely shot with my hv30 and said lens.
If you go with anything larger than 0.3 it make almost no difference with a size 43 thread. Also because it converts down from 60's something you don't have to zoom at all to eliminate any vignette. other lens' you do.
also im not just saying this so you buy my lens, im saying get this one because its the best option for an hv30. i paid almost 200$ off b&H back in the day for this lens and it was great.
good luck though! and stoked the ol hv30 is still being used.