Originally posted by susanb Interesting.
Thanks for the information.
Susan
Susan, from another thread I'm working this issue on
Doug
Originally posted by chobit Quote
Just want to write a little more details, and hopefully that would be helpful for those who are interested to use the Pentax Flash PTTL system with the 645Z
Setup:
- 645Z
- AF360FGZ II
- AF540FGZ II
Both allow you to setup the Flash in HSS mode as a Master Flash on Hot-Shoe or Controller mode.
The challenge I have with Flash compensation not working when making the changes from the flash
Example:
At 1/125 +1 FEC on the flash, it works. As soon as you start 1/160, the +2 FEC no longer kicks in.
At 1/125 +1 FEC on the Camera. Using 1/160 continue to accept the +1 FEC from the camera
Sadly, you can use -4 to +2 FEC from the flash if it works, on the camera, you are limited to -2 to +1
Translate this to a remote flash setup using my 360 II as controller and the 540 II as the remote flash. I am limited to +1 FEC from the camera, as the flash because of the HSS mode, which is very limiting, when compare to my Canon remote flash setup.
Read more at:
https://www.pentaxforums.com/forums/48-pentax-medium-format/268881-report-wir...#ixzz3V6SdpEB6 Originally posted by constable I have also been fighting with this.
My experience is the following.
With the AF540FGZII on camera i can HS up to 1/4000 s. That is the good news.
Using Cactus V6 on camera with the AF540FGZII mounted on top and a remote Cactus RF60 on a second Cactus V6, I can get remote triggering up to 1/125. However, when the HSS is set on the AF540FGZII the camera reverts to a sync of 1/60. The remote (usually) fires and I get massive over-exposure. It seems that the Cactus will not pass through the HS setting on the Pentax flash. I have also been unsuccessful in using HS modes on Metz flashes, either direct or with Cactus units.
I have not had a great deal of success with Profoto but I am still working on this
Ed
so it looks like using the 360 or 540 flashes hss will work with no cactus in the mix
what seems to be not working is fec, and when a cactus is involved (whether the on camera flash is on top of a cactus, or a remote 360/540 is mounted on a cactus)
ed, doesn't the cactus rf60 flash have a built in radio and by mounting it on a cactus you might be confusing it?
what I'm going to do is by a used 540 from b&H, mount it on a cactus on my camera, attached a cactus to my einstein640. Then set the camera to manual (or if I have to x mode), 1/500 shutter speed, and fire the einstein at full power (according to paul c buff that would mean a flash time of 1/588); that should allow the flash to completely illuminate the scene before the second shutter comes down (1/588 flash is faster than 1/500 camera shutter)
why do I feel frustation looming?