A windless, bright day meant I could take the Countess into the garden and learn more about how it performs.
Successful experiments with low light and hight contrast situations have been encouraging. Focal lengths from 4 to 10 inches were tried with F stops from F6.3 to F45.
Exposure times ranged from 2 to 10 seconds.
However focussing is still difficult – I was waiting for a replacement screen that arrived a day later.
Here are pictures to show the difference in screen thickness.