Switch between LEE and Rosco numbers

In Settings, pick LEE, ROSCO or BOTH for gels. ROSCO works the answer out on Rosco's own values, so it can choose a different stack; BOTH shows LEE's answer with the Rosco equivalent beside each sheet.

Step by step

1. Open Settings from the corner of the meter.
2. Find Gels and pick LEE, ROSCO or BOTH.
3. Go back to the REFERENCE card. The answer now uses the book you picked, for example 205 / R3408 with BOTH.

If that didn't work

LEE and Rosco sheets of the same name differ by up to about 28 mired, so the two books can give different stacks for the same gap. That is expected.

Go further

• CTO, CTB and green gels in one chartChart

Last updated October 26, 2026