Ha test rig [was H-alpha detection by human eye?]

[nytecam]

Thanks for the earlier post response. 

As a follow-up any ideas how to set up a lab test rig to test
observers' visual sensitivity to low level H-alpha emission or
radiation close to 656.3nm?    It must be small, portable, safe and low
cost!  I'd like to take devise to astro meetings.

Nytecam


-- 
nytecam