I'm guessing that William and the Mrs. are right, although I'll have another go at watching my shutter. Seemed to me it stayed open and closed once, but my eyes are old. In any case, it works. I've been doing a lot of high speed synch since I bought it with nice results. I did shoot a frame with the focal plane shutter set at 1/250. It was blank. The fact that the focal plane has to be set at 1/8 makes me think that Bill is right. Paul
William Robb wrote: > > ----- Original Message ----- > From: Bolo > Subject: Re: Leaf shutter operation on Pentax 67 165mm f/4.0 LS > > > I asked about the operation of the leaf shutter, and have two > > conflicting answers! > > But we didn't flame each other!!!! > > > To answer William, my thought was that since Pentax was trying > to make > > the lens simpler that perhaps they built a leaf shutter which > just > > closed. High speed sync would still be available -- the > flash would > > fire after the focal plane shutter curtain opened, which would > illuminate > > the entire frame. Then the "1/2 leaf shutter" would close > quickly, > > giving the high speed sync. Yes, there could be uneven > exposure side > > due to the movement of the shutter curtain -- but there is > already uneven > > exposure center to edges caused by the leaf shutter. > > There would be very uneven exposure. The 6x7 focal plane shutter > is about as slow as you can get, and still have movement. > > > > Given the two answers I have one more question/statement ... I > think > > the deciding factor has to go to the presence of of PC-cord > sync > > connector on the lens. I've been tracking down photos of the > lens, > > and finally found one which _I think_ definitely shows the > presence of a > > PC connector. That implies that the leaf shutter must open > and close. > > If it only closed then there would be no need for a sync > connector, > > as the focal-plane-shutter-open event would allow for flash > sync. > > > > In other words, does the 165LS have a PC connector? If so, I > think > > it must work as William reports. > > The 165LS has a PC sync socket on the lens. Unfortunately, they > left off the cable release socket that is on the 90mm leaf lens, > which facilitated multiple exposures with the 6x7. > > William Robb > - > 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 .
