On Sat, 20 Oct 2001 09:59:17 -0400, Mark Roberts wrote: >Last night I was talking with the co-owner of my favorite local photo lab and he >was telling me about his problems trying to get his 67-II to wirk with a leaf >shutter lens and TTL flash metering. He (and, apparently, Pentax) says it can't >be done. The primary reason is obviously that the flash wants to fire as soon as >the focal plane shutter opens, at which point the leaf shutter is closed. I >believe there's a PC flash connector on the lens itself, but of course this >provides triggering only (in other words, it has only ground and one electrical >contact rather than the multiple contacts of the hot shoe which send TTL >metering information to the flash. > >Could a PC flash cable from the lens be spliced into the hot shoe wiring to >solve this? > >Any 67 users dealt with this?
Mark, I'm not a 67 user but I am into electronics (yes doing it for a living not just playing with it). Taking the trigger from the LS lens instead of from the camera MAY work. It really depends on the how Pentax do things inside the camera. It certainly won't break anything if you try. I would do it this way: 1. Get hold of a Hotshoe adaptor F 2. Remove the 4 screws from the bottom of the adaptor and carefully separate the 2 halves. 3. Remove the centre pin and the spring that holds it. Put them in a zip lock plastic bag so you don't loose them and can put them back if you ever want to. 4. Get an old PC flash sync cord that is long enough to go from the pc socket on the lens to the hotshoe of the 67. Cut off the end you don't need and strip off about 1 cm (a bit under half an inch) of the insulation. Solder the centre wire to the contact where you removed the centre pin, then insulate the braided outer wire of the pc cable and solder the end to the hot shoe ground. 5. Make a small hollow in one half of the adaptor case (I'd probably do it to the top half) to allow the PC cable to exit and then put it together. The result should look quite professional and MIGHT even work. It will even allow you to use the 5P cables to give you TTL using multiple off camera flashes with the LS lens. If it doesn't work you can remove the modification and you end up with a hotshoe adaptor with a hole in it. If you do give this a go please let me and the rest of the group know how it goes. Leon http://www.bluering.org.au http://www.bluering.org.au/leon - 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 .
