Originally posted by alexcam I normally shoot indoors on AV with flash gelled for tungsten. I have the flash at -1.5 to -2.0 EV for fill in. The shutter speed varies according to different lighting conditions because I have the flash set for slow sync. Yesterday I decide to experiment with my A50/1.7 and the speed locks at 1/180 sec. Look up the manual and sure enough that's what it's supposed to do. My question is why and is there a work around to this? Thanks
what camera are you using and what settings. As far as I know, you can set the sync speed anywhere you want, below 1/180
BUT in some auto modes the pentax engineers set it to 1/180 because they do not link the focal length input with manual focus lenses, to the shutter speeds .
If you put a zoom lens on the camera and change focal length the sync speed follows the 1/FL line to insure that in fill flash mode you have enough shutter speed to avoid ghosting from camera motion. It could be linked as well with MF lenses but does not seem to be.
I shoot in manual mode and set the shutter where I want it to be, it is not forced upon you, but is set there in auto modes as a starting point
Note, this only applies to Av mode.
In TV and manual modes you can change the shutter where ever you want. That is, up to the K7 any way. Can't answer for newer bodies