Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-25-2011, 10:45 AM   #1
Forum Member




Join Date: Jun 2011
Location: Dallas TX
Photos: Gallery | Albums
Posts: 90
K-5 and Off-camera Flash Sync Issue

Season's Greetings!
I've been tasked with shooting an indoor family portrait (6 adults and 1 dog) today. I was planning to use my K-5 with a DA 16-45, and 2 umbrella-mounted flashes, a Sunpak Auto 383 Super and a Metz 50 AF-1, both on optical bubble flash triggers, triggered by the K-5 built-in flash in "Commander" mode. Has anyone tried a similar set-up? What's the best way to ensure that all flashes fire simultaneously, for a good exposure at, say, 1/160 sec at f/8? (I seem to be getting a decent exposure, but not sure if all my settings are correct (Sunpak on "Manual" and Metz on "Slave" mode, K-5 Wireless "On", flash in "Commander" mode).
Thank you! ~Steve


Last edited by stevelink; 12-25-2011 at 11:05 AM.
12-25-2011, 12:12 PM   #2
Veteran Member




Join Date: Sep 2009
Posts: 1,178
I havent used sunpack yet - though I'd suggest playing around / familiarize with the manual mode for Metz as well (servo mode i think), just in case PTTL goes wonky. I just did a xmas shoot (see the photo section) where i brought the Metz - and the PTTL went wonky and fired full power for every shot! Good luck, have fun!
12-25-2011, 12:41 PM   #3
Veteran Member
creampuff's Avatar

Join Date: May 2007
Location: Singapore
Photos: Gallery
Posts: 3,955
TS, basically the flash units that you're using cannot fully communicate with the camera. The slave units may trigger the flash units when they detect the on-camera flash, but there is little or no control over the light output, so your results will be likely be a hit or a miss.
12-25-2011, 01:58 PM   #4
Veteran Member




Join Date: Sep 2009
Posts: 1,178
Oh btw, on servo mode - the metz does NOT fire at 1/1. You have to go lower or equal to 1/4 power.

https://www.pentaxforums.com/forums/pentax-flashes-lighting-technique/160117-...tz-58-af2.html

Great. This would have been great to know 2 nights ago. I really dont like these little tidbits of undocumented work arounds. Maybe we need to have a board for undocumented work arounds, guys.

Then again..the servo mode of Metz 58 is an addition to the firmware and is NOT in the printed manual. So the feature by itself is undocumented.

12-25-2011, 02:06 PM   #5
Veteran Member
demp10's Avatar

Join Date: Jun 2011
Location: Atlanta
Photos: Albums
Posts: 602
Steve, most likely the build-in emits a control flash that triggers your optical slaves before the shutter opens. It then emits another control flash when the shutter is opened. The slaves are still recycling at that time from the first discharge and do not fire. Pentax flashes that are designed for such opperation, coordinate with the build-in and discharge on the second control flash. They also do P-TTL to control the exposure.

If you have another small manual flash, mount it on the camera, set the camera to X-mode, set the flash to its lowest output and see if that triggers the others properly. Your best option will be to use wireless triggers. If the flashes have low voltage you can use PC cords and fire them that way also.

Good luck,

Demetri
12-25-2011, 02:26 PM   #6
Pentaxian
Aegon's Avatar

Join Date: Jan 2008
Location: Portland, OR
Posts: 1,413
According to Metz, the latest 50 AF-1 firmware offers pre-flash suppression: http://www.metz.de/index.php?eID=tx_nawsecuredl&u=0&file=fileadmin/fm-dam/Do...83d411d3fc0639

Get the latest firmware here: mecablitz 50 AF-1 digital: Metz
12-25-2011, 11:31 PM   #7
Forum Member




Join Date: Jun 2011
Location: Dallas TX
Photos: Gallery | Albums
Posts: 90
Original Poster
Group portrait with off camera Metz and Sunpak umbrella flash

Greetings All.
Thank you for your expertise!
I was not extremely pleased with the outcome, for various reasons, but luckily, I am much more picky than my family is!
The image was shot with the following settings:
On the Pentax K-5:
Lens: Pentax DA 16-45 at 19mm (Approx. 10 ft. from group)

Flash in Wireless Mode: Off
Manual Mode: 1/125 sec at f/9 ISO 200
Built-in Flash Mode: On at -0.7
Quality: RAW + JPEG Fine

Umbrella Flashes:
Metz Mecablitz 50 AF-1 at Full Power (P= 1/1) Servo Mode into a 44 white umbrella approx. 5 ft. from group at camera right (Main light)
Sunpak Auto 323 Super at ISO 200 Manual Full Power into a 40 white umbrella approx. 6 ft. from group at camera left (Fill)

The resulting image looked about a half stop under-exposed (both on LCD and display in Photoshop prior to correction), but I knew I could somewhat "correct" exposure in Photoshop. However, I did not want to either open the aperture (needed DOF for both rows of people in focus) or increase the ISO (200 is acceptable insofar as noise), and I could not really move the umbrellas any closer or they would have intruded into the image.
I just don't understand why a Metz flash made for Pentax cameras would not sync properly. Perhaps I had an incorrect setting on the K-5. (I realize that a light kit such as those by Profoto, Dynalite, Elinchrom, etc. would have worked better, or possibly the radio slaves as you suggested.
Anyway, thanks again, and Happy Holidays!
12-26-2011, 10:58 AM   #8
Veteran Member




Join Date: Sep 2009
Posts: 1,178
Naw...I have elinchrom. The pre-flash makes that a hit and miss too. Radio trigger is the way to go. Cheers !
QuoteOriginally posted by stevelink Quote
Greetings All.
Thank you for your expertise!
I was not extremely pleased with the outcome, for various reasons, but luckily, I am much more picky than my family is!
The image was shot with the following settings:
On the Pentax K-5:
Lens: Pentax DA 16-45 at 19mm (Approx. 10 ft. from group)

Flash in Wireless Mode: Off
Manual Mode: 1/125 sec at f/9 ISO 200
Built-in Flash Mode: On at -0.7
Quality: RAW + JPEG Fine

Umbrella Flashes:
Metz Mecablitz 50 AF-1 at Full Power (P= 1/1) Servo Mode into a 44 white umbrella approx. 5 ft. from group at camera right (Main light)
Sunpak Auto 323 Super at ISO 200 Manual Full Power into a 40 white umbrella approx. 6 ft. from group at camera left (Fill)

The resulting image looked about a half stop under-exposed (both on LCD and display in Photoshop prior to correction), but I knew I could somewhat "correct" exposure in Photoshop. However, I did not want to either open the aperture (needed DOF for both rows of people in focus) or increase the ISO (200 is acceptable insofar as noise), and I could not really move the umbrellas any closer or they would have intruded into the image.
I just don't understand why a Metz flash made for Pentax cameras would not sync properly. Perhaps I had an incorrect setting on the K-5. (I realize that a light kit such as those by Profoto, Dynalite, Elinchrom, etc. would have worked better, or possibly the radio slaves as you suggested.
Anyway, thanks again, and Happy Holidays!


12-26-2011, 11:35 AM   #9
Forum Member




Join Date: Jun 2011
Location: Dallas TX
Photos: Gallery | Albums
Posts: 90
Original Poster
Thank you all for your valuable information! Though I did manage to get a decent portrait using the setup described, I still feel that my image was at least 1/2 stop underexposed out of the camera, as I had to do some post-processing to obtain a "correctly exposed" image. I think my question is, On the K-5, which wireless flash mode to set that eliminates the "pre-flash", so that the Metz and Sunpak flashes wll only see a single flash and the optical slaves will then work correctly? (I was thinking "Control", since I want the built-in flash to simply trigger the main umbrella flashes, and to only add eye "sparkle".) Thank you!
12-26-2011, 02:15 PM   #10
Senior Member




Join Date: Dec 2007
Location: Finland
Photos: Gallery
Posts: 185
Although the built-in flash will always emit a pre-flash and thus be unsuitable as a trigger a flash on the camera shoe will fire at the right time to work as a trigger when it's set to manual (you may want to reduce the output to something like 1/8 - 1/32). If you are using a Pentax flash on the camera you may want to set the camera to M too, otherwise the flash will revert to A or TTL mode every time you turn the camera off and on again.
12-26-2011, 05:51 PM   #11
New Member
tessagree's Avatar

Join Date: May 2011
Posts: 6
test well before the shoot

Flashes can behave erratically when we least need it, so test well before the shoot and always have a a back up plan!
BTW I use the Cyber commander system which is great except the 540 Pentax flash only triggers correctly at 1/50th second!
Here is the Australian link to the set up
https://paulcbuff.com.au/cms/index.php?option=com_virtuemart&page=shop.brows...id=15&Itemid=1

Last edited by tessagree; 12-27-2011 at 03:07 AM.
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!
camera, dslr, exposure, flash, k-5, k-5 ii, k-5 iis, k5, metz, mode, pentax k-5, sunpak
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
sync off camera flash otisdeezer Troubleshooting and Beginner Help 11 12-26-2011 11:43 AM
Is Flash Sync Speed limited by the body or flash? Reportage Troubleshooting and Beginner Help 16 09-16-2010 06:18 AM
Syncing off camera flash with sync cord velingara Flashes, Lighting, and Studio 3 03-23-2010 07:47 AM
67II -- which sync cord for TTL off-camera flash? Dick Sanders Pentax Medium Format 2 05-29-2009 07:57 PM
Super slow sync w/off camera flash Mark2100 Post Your Photos! 3 12-30-2008 01:07 AM



All times are GMT -7. The time now is 08:16 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