Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
10-27-2007, 06:50 PM   #1
Senior Member

Join Date: Oct 2006
Location: Montreal
Photos: Gallery
Posts: 179
*ist DL2 + External Flash + Radio Trigger = Problems

I bought one of these inexpensive radio flash triggers off eBay. It works like a charm... except when the camera is in Manual exposure mode. It works fine in P, Av, Tv... but not M. The flash simply refuses to fire.

The flash will fire if it is attached directly to the camera. There's no problem with Manual exposure in that case, but it will not work with the radio trigger.

The particulars:
  • *ist DL2
  • Sigma EF-500 DG Super
  • PT-04 radio trigger
Any suggestions would be most appreciated. How can I force the camera to trigger the flash unconditionally?

10-27-2007, 07:11 PM   #2
Veteran Member
FotoPete's Avatar

Join Date: Feb 2007
Location: Toronto
Photos: Gallery
Posts: 1,711
what's the sync speed? Cuz the Pentax *Ist series have a sync speed of 1/180 max. Adding the radio trigger is an extra step in the process.

You might need to dial down to 1/100 or lower and check.
10-27-2007, 07:33 PM   #3
Senior Member

Join Date: Oct 2006
Location: Montreal
Photos: Gallery
Posts: 179
Original Poster
Bingo, FotoPete. You nailed it. Much obliged.

1/180th is a too fast, as the shutter curtain is still moving when the flash turns off. 1/125th does the trick.

  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
*ist, camera, dl2, exposure, fire, flash, photography, radio
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
radio TTL flash trigger marinb Flashes, Lighting, and Studio 4 01-29-2010 01:41 PM
Review: FlashWaves Radio Flash Trigger after 7 months Genes Pentax Flashes, Lighting, and Studio 15 11-26-2009 12:50 PM
Calumet 4 Channel Radio Flash Trigger? CalendarGuy Flashes, Lighting, and Studio 0 02-15-2009 02:35 PM
White Lighting Radio flash trigger smokey Flashes, Lighting, and Studio 0 03-11-2008 05:23 PM
External Flash Trigger voltage for the ... roscot Pentax DSLR Discussion 3 07-27-2007 12:06 PM

All times are GMT -7. The time now is 06:25 AM. | See also:, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]