Using the standard pinhole, which (I think) is 0.35mm you should be ok to down to around 20-30cmif it's less than that you would benefit from a smaller pinhole. The closest I tried is 10cm, and 0.25mm was a big improvement over 0.35mm (at this distance).
How close is close?
Using the standard pinhole, which (I think) is 0.35mm you should be ok to down to around 20-30cm if it's less than that you would benefit from a smaller pinhole. The closest I tried is 10cm, and 0.25mm was a big improvement over 0.35mm (at this distance).