- Posts: 1
- Joined: Fri Jan 07, 2022 3:47 pm
- Real Name: Nick Hancher
You need to set your backfocus every time you change a B4 lens!
By the way you need three shims: standard is a black 0,10 and a metal 0,50. When using a B4 mount you have to add an extra 0,10.
Chromatic abberation is always visible with this kind of (cheap) lenses. I use expensive Canon HJ lenses but if you know how to look you always see a little chromatic abberation and blue fringe. For really clean images you need lenses which can’t zoom, or zoom a little. My Sigma ART 18-35 (€999,00) gives a very clean image compared to my Canon HJ11(€ 34.000,00 list-price).
Don’t expect miracles with a lens of ‘only’ $ 5995,00 and a zoom factor of 20.
To use remote iris you have to set auto iris to ‘off’ in the camera menu and set auto iris to ‘on’ on the lens itself.
If you have other questions please don’t hesitate to ask; I’m working a few years with Ursa’s and BMPCC’s on Atem switchers.