> I'm looking at Bostick & Sullivan's page and the calibrated one costs
$19 (uncalibrated $8). Is there still a less expensive alternative
I reckon you're doing well if you can get an uncalibrated one for $8. In
the UK, an uncalibrated Kodak Step Wedge No 2 costs the equivalent of (wait
for it!) $115, although you can get an Agfa one for around $18.