Yevgeny NP
Member
Glad you asked...
Heliopan 72mm-86mm step up ring;
Heliopan 86mm-105 mm step up ring
B+W 105mm Screw in Wide angle metal lens hood # 970.
If I use only the 72-86 step up, then I can use my Rodenstock 86mm MC slim circular polarizer.
for my 140mm Contax (also with 72mm front ring) I use a Nikon HN-20 metal hood.
I had been using the same Nikon hood on 45mm with P30+ back, with hardly any vignetting, but with the larger sensor of IQ260, I needed a shorter, wider hood. I may have overdone it with this configuration. i.e. I might have gotten away with something a little less extreme diameter and possibly better practical, such as the 86mm B+W metal lens hood, but this is how I ended up for now.
Thank you for the great explanation. Very good information re HN-20.
