sv605 ir cut

Svbony 605cc doesn't have a uv-ir cut filter so...

cc and ff spacings therefore need an extra 1mm sensor distancing from the body of the optics.

e.g. with the q150

1. without filter:
17.5 + 30 + 6 = 53.5mm

2. with filter
17.5 + 30 + 7 = 54.5mm

Most easily achieved using the final m48 to m42 step down adapter, 6mm or 7mm.