Hey guys
I have a Pentax k100d super. Recently I got an Asahi Pentax SMC 50mm f1:17 lens, which is quite old with no AF.
I didn't expect any auto functions so I went straight to manual mode and everything works perfectly, I use the ring to adjust aperture and choose my own shutter-speed. However out of curiosity I tried aperture priority mode and something strange is happening. I set the ring to f1.7 and the camera chooses an appropriate shutter-speed and all shots come out fine. When I turn the ring to f22 the camera continues to fire with automatically controlled shutter-speed, but the shots that come out were obviously still shot at f1.7!
So even with the aperture ring set to f22, when the camera is in av mode, somehow the aperture blades are still wide open - which suggests the the camera is somehow locking them open or something? It's just annoying because I would like to be able to use auto-metering in av mode at apertures other than f1.7!
Anybody have any insight? Thanks in advance.
Cheers, Nic
I have a Pentax k100d super. Recently I got an Asahi Pentax SMC 50mm f1:17 lens, which is quite old with no AF.
I didn't expect any auto functions so I went straight to manual mode and everything works perfectly, I use the ring to adjust aperture and choose my own shutter-speed. However out of curiosity I tried aperture priority mode and something strange is happening. I set the ring to f1.7 and the camera chooses an appropriate shutter-speed and all shots come out fine. When I turn the ring to f22 the camera continues to fire with automatically controlled shutter-speed, but the shots that come out were obviously still shot at f1.7!
So even with the aperture ring set to f22, when the camera is in av mode, somehow the aperture blades are still wide open - which suggests the the camera is somehow locking them open or something? It's just annoying because I would like to be able to use auto-metering in av mode at apertures other than f1.7!
Anybody have any insight? Thanks in advance.
Cheers, Nic