Originally posted by craveone I used to change shutter speed like this on my k1000. But I noticed there were times that my finger would somehow lift the shutter dial a bit, which would then change the ISO. It sucked the first time it happened. To find out at the end of my roll that My ISO was between 1600 and 3200 on the dial. I now just drop the camera from my eye to change it with both finger and thumb. Which even on the k1000 can be alittle annoying since the space is small. This is one of the reason's I decided against the MX. I was afraid it would be just like my k1000, but that the space would be even smaller for my fingers. Sucks, cause it looks like such a gorgeous camera. And I do love the size of the ME a friend let me borrow.
The MX and K1000 have different mechanisms for changing the ISO setting. While on the K1000 (like the Spotmatics) you to lift and turn the outside of shutter dial, the MX requires you to depress a pin on top of the dial, and then turn. It's more or less impossible to do this by accident while changing the shutter speed.