I'm with Rduraoc on this way of thinking, Although not blessed with the climate of Lisbon. I generally try to use 100 ISO or even Ilford PANF 50 and then slap a light or dark yellow filter on. Works great with fast primes, still get a decent shutter speed 250 or 125. I find my favourite shots were taken this way as it forces you to shoot wide open, and everything not applicable is nicely blurred.
Originally Posted by rduraoc