Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-11-2019, 11:57 AM   #1
Senior Member




Join Date: Feb 2017
Location: Zagreb
Photos: Gallery
Posts: 141
Pairing flash and camera ???

Hello everyone!
I own Pentax K70.
My friend has K50 and Pentax flash AF540FGZ that are sinchronized so whenever he changes aperture, flash adjusts its settings.
We tried it on my K70 but flash didn't work. Stone dead. I mean, it flashed all right, but no other life signs.
My question is: do I need to pair the flash and the camera? There's nothing in the K70 manual about it.
Is there anything I must do to ensure synchronisation between the two?
Soon I'll have a chance to try one more AF540FGZ and I don't want to miss the opportunity to buy it.
Any other suggestions for some other external flash with same or better characteristics?
Thanks to all!

06-11-2019, 01:12 PM   #2
Pentaxian
enoeske's Avatar

Join Date: Jul 2009
Location: Surprise, Az
Photos: Gallery
Posts: 2,053
QuoteOriginally posted by violaferenc Quote
Hello everyone!
I own Pentax K70.
My friend has K50 and Pentax flash AF540FGZ that are sinchronized so whenever he changes aperture, flash adjusts its settings.
We tried it on my K70 but flash didn't work. Stone dead. I mean, it flashed all right, but no other life signs.
My question is: do I need to pair the flash and the camera? There's nothing in the K70 manual about it.
Is there anything I must do to ensure synchronisation between the two?
Soon I'll have a chance to try one more AF540FGZ and I don't want to miss the opportunity to buy it.
Any other suggestions for some other external flash with same or better characteristics?
Thanks to all!
If the flash is in P-TTL mode, then it will change its settings all on its own. If you are in P-TTL HSS, then you can raise the shutter over 1/180. You can do whatever you want with the camera and the flash will attempt to achieve the correct exposure.
06-11-2019, 01:43 PM   #3
Senior Member




Join Date: Feb 2017
Location: Zagreb
Photos: Gallery
Posts: 141
Original Poster
QuoteOriginally posted by enoeske Quote
If the flash is in P-TTL mode, then it will change its settings all on its own. If you are in P-TTL HSS, then you can raise the shutter over 1/180. You can do whatever you want with the camera and the flash will attempt to achieve the correct exposure.
Thanks enoeske! I just didn't get the first part..."the flash will change its settings all on its own". If in the P-TTL HSS mode it adjusts to the camera, in P-TTL mode mode it adjusts to what?
06-11-2019, 02:05 PM   #4
Pentaxian
enoeske's Avatar

Join Date: Jul 2009
Location: Surprise, Az
Photos: Gallery
Posts: 2,053
QuoteOriginally posted by violaferenc Quote
Thanks enoeske! I just didn't get the first part..."the flash will change its settings all on its own". If in the P-TTL HSS mode it adjusts to the camera, in P-TTL mode mode it adjusts to what?
In all P-TTL modes, the flash adjusts itself. You set what you want on the camera. When you go to take a shot, it shoots a very fast pre-flash and calculates what it needs to do to get the correct exposure, and then shoots the main flash in sync with the camera's exposure. If you have the camera set to underexpose, the flash will use more power to brighten it. If you have the scene metered at 18% gray already, it will use barely any power.

Normal sync speed of the aps-c cameras are usually 1/180th. The flash will not fire if you have the camera set faster. You can change the flash to P-TTL HSS (high speed sync) which will change the flash to a series of small bursts allowing you to shoot above the 1/180 limit.

06-11-2019, 04:11 PM   #5
Pentaxian
rogerstg's Avatar

Join Date: Oct 2007
Location: Rhode Island
Photos: Albums
Posts: 425
QuoteOriginally posted by violaferenc Quote
We tried it on my K70 but flash didn't work. Stone dead. I mean, it flashed all right, but no other life signs.
I've had similar behavior from my AF540FGZ and found that (assuming the contacts are clean) with everything off, assemble the flash onto the hot shoe. Then turn on the camera first, and after a few seconds, turn on the flash.

---------- Post added 06-11-19 at 07:14 PM ----------

Also, in order for the zoom feature to work, be sure that the flash diffuser is not deployed.
06-12-2019, 05:49 AM   #6
Senior Member




Join Date: Feb 2017
Location: Zagreb
Photos: Gallery
Posts: 141
Original Poster
Thanks a lot folks! I can't wait to try it this weekend. Keep ur fingers crossed I buy the thing.
Reply

Bookmarks
  • 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!
af540fgz, camera, failed, flash, flash and camera, k-70, k70, lighting, paired, pentax, photo studio, strobist, synchronisation
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Machinery A fine pairing--Bigma and Benro charliezap Post Your Photos! 9 03-09-2017 11:21 PM
What WR body to consider pairing with my K-01? ZombieArmy Pentax DSLR Discussion 19 08-11-2015 12:59 PM
Pairing sigma 610dg super for HSS chickenandavocado Flashes, Lighting, and Studio 1 02-26-2014 09:19 PM
Macro Pairing up for work! eaglem Post Your Photos! 4 10-16-2013 05:37 PM
For Sale - Sold: Pentax K100D and flash **Flash is sold** Camera reduced!!! davidgreen3003 Sold Items 8 07-10-2013 03:52 PM



All times are GMT -7. The time now is 06:20 PM. | See also: NikonForums.com, CanonForums.com 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?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top