Alan Chan wrote: > I do not know if I understand correctly. As I can observed, the aperture > read out has no effect on the actual exposure accuracy. It is just a value > "guessed" by the camera and displayed in the viewfinder LCD. The chosen > shutter speed is determined solely by the EV level and position of the > contact on the variable aperture resistor. Due to the mechanical > manufacturing tolerance differences, some cameras or lenses may be off a > little bit.
That was what I was thinking. > Yes. But when the F/FA lenses were set other than 'A', I believe the > position of the aperture resistor coupling makes the difference too. For > instance, if you set the lens at f5.6, grip the lens and try to rotate, > the read out may become f4.5 or f6.7 (vary from lens to lens and camera to > camera). You appear to be correct here. I just tried it with the Z-1p and the 400mm. Twisting the body/lens changes the reading by half a stop in one direction. F/8 will read correctly if twisted one way but will read f/9.5 when twisted the other. So I was incorrect yesterday. The camera/lens junction is barely moving BTW - it is definitely not loose so the actual exposure error is likely to be minimal. I hope. I didn't check to see if the shutter speed changed or not. I'm becoming a bit too tempted to look at the MZ-S... Cheers, - Dave http://www.digistar.com/~dmann/ (out of date) - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
