Using the Bulb Timer, I noticed the exposure value in the image that was taken isn't exactly what was set. For example, I set the Bulb Timer to 10s, after the image was taken and reviewing the image the exposure value at the upper left of the image shows 10"6 (same for exposure more than 30 sec). I went ahead to M mode (turned off Bulb Timer at this point) and set exposure to 10 seconds to do another test. Reviewing the image shows exactly 10". Thoughts?
The said behavior is somewhat similar to what most external remote/intervalometer gives wherein the exposure value isn't exactly set for taking the image.