Author Topic: Minor Panasonic 20mm mystery (Read 834 times)

Centauri27 · « **on:** July 30, 2010, 11:02:50 AM »

In playing around with my Panasonic 20mm, I noticed something slightly odd: in A and M modes, I can select f/1.7, but in any of the auto modes, the E-P1 "only" goes down to f/1.8. Has anyone else experienced this? Is it a firmware thing?

voyager · « **Reply #1 on:** July 30, 2010, 02:37:37 PM »

I think that's because the auto mode only detects one third increments of the ISO. I don't know if they ever updated the firmware for that. Also, Olympus doesn't have a Micro Four Thirds lens that goes below f/2.8.

Olof in Amsterdam · « **Reply #2 on:** July 30, 2010, 02:53:14 PM »

Mine does go down to 1.7 when I point the E-P1 at a dark spot in my living room at night.

Centauri27 · « **Reply #3 on:** August 03, 2010, 02:38:53 PM »

Yes, you're right Olof. When I point it at a darker area in my room, the aperture drops from f/1.8 to f/1.7. Rather odd algorithm. As voyager noted, it's probably because f/1.8 is the next 1/3 f-stop down from f/2.

Minor Panasonic 20mm mystery