I'm still not sure about this not using laser printer business. It's quite limiting using ink jet printers and non fluorescent light (what building these days doesn't have them?) and still trying to get enough light to run it. I could go outside but then what about wind, clouds and changing light etc?
How are you guys running it? Are you using additional LED lights or something?
The FoCal manual says that ink jet printer is preferred because laser printer printouts can
be reflective, which could affect the results. It also says that if you use a laser printer, make sure to position the lights to minimize reflections (whatever that means - in an angle I assume?)
I did not have an ink jet available, and printed the target on two different laser printers at work, then chose the one that looked less reflective. For lighting, I simply bought two 250W work lights (similar to these
, I chose a cheaper brand) and placed them close to the target, one to the right and one to the left. That gave me about 11EV, and I got consistent results.