Of course, now that I have my handy-dandy flash, I did not need to use it on my Holga 135 BC on my second trip to South Park. I thought it would be a good idea to go again and take some photoes on yet another gloomy day to see the difference, but that was not to be. Miraculously, mid-morning, the sun came out and it was a beautiful day in San Francisco today!
Entrance to South Park
with green color filter on
used the flash here, but don't see much of a difference...