Test Mamiya ZD Back DB with or without mounted IR cut filter YB401

2. Test using Mamiya RB67 Pro SD and ZD Back DB without sensor filter

The same image taken once with sensor filter and without.

Below with different aperture.

Mamiya ZD back DB with IR cut Filter YB401 and with filter removed (right)

ZD Back DB with standard sensor filter YB401.
f=127mm f/16

ZD Back DB without sensor filter.
f=127mm f/16

ZD Back DB without sensor filter.
f=127mm f/22

ZD Back DB without sensor filter.
f=127mm f/32