Scenario 1 is correct. The focal plane shutter opening is the start of exposure, the leaf shutter closing ends the exposure. Paul
Bolo wrote: > > I was curious about something and wondering if someone with the Pentax > 67 165mm f/4.0 LS lens or its manual could answer a question I > have about the operation of that lens. I don't have the lens or > a manual for it to examine or try myself. > > When the camera's shutter release is triggered, the auto-aperture > coupling from the body steps down the aperture and also triggers the > shutter. I can see two behaviors for this particular leaf shutter, > and I was wondering which is correct: > > 1) The leaf shutter stays open and starts running it's timer. > When the time runs out, it closes the leaf shutter. In other words, > the first curtain of the focal plane shutter acts as an open-shutter > event, and the actuation of the leaf shutter after delta-t acts as > the close-shutter event. This would seem to reflect the "not quite > a leaf shutter" comment that has been made. > > 2) The shutter closes immediatetly so that when the focal plane > shutter opens, no light is admitted. Then the leaf shutter opens and > closes depending upon it's own delta-t timer again. This is the true > leaf-shutter mode. However it is more complex than the first scenario. > > If the manual has the answer, that would be great. Otherwise, I > suppose one could determine this by triggering the 165 LS manually > and observing if it > 1) closes from the open position after shutter time > or 2) closes, then opens and closes again after shutter time? > > Thanks for any info. > Bolo -- Josef T. Burger > - > 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 . - 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 .
