Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
09-04-2011, 08:48 PM   #1
Pentaxian




Join Date: Jul 2011
Location: Eastern Oregon
Posts: 615
K-5 hot shoe failure?

So I was shooting a senior portrait today with my Vivitar 285 in the hot shoe for fill flash and I changed the WB setting to flash sync and my hot shoe quit working/flash wouldn't fire. I set the WB back to AWB and the hot shoe started working again. So I shot the whole thing with AWB, no biggie in RAW.

I got home and noticed the custom setting that would give you AWB with flash and set that to "2" unchanged, and now my hot shoe works whatever WB I set.

BUT, my hot shoe also works when I set that custom setting back to "1" AWB. SO in other words I can't replicate the problem...

I'm running Firmware 1.03 and wonder if this is a bug? Anyone know why my hot shoe shut down today, or is it just faulty? Thanks for any ideas...

09-04-2011, 10:11 PM   #2
Veteran Member
octavmandru's Avatar

Join Date: Jan 2009
Location: somewhere around
Posts: 615
What version is your 285?

Reason I'm asking is the trigger voltage. Viv had a couple of versions of the 285, one which was unsafe to use with modern hot shoe.

Octav
09-04-2011, 10:42 PM   #3
Pentaxian




Join Date: Jul 2011
Location: Eastern Oregon
Posts: 615
Original Poster
QuoteOriginally posted by octavmandru Quote
What version is your 285?

Reason I'm asking is the trigger voltage. Viv had a couple of versions of the 285, one which was unsafe to use with modern hot shoe.

Octav
Hi, good point, but it's a brand new 285, latest (cheapie) Chinese production. Worked fine on my Panasonic G3 and now works fine on my K-5... Not sure what I did.
09-04-2011, 10:45 PM - 1 Like   #4
Pentaxian
philbaum's Avatar

Join Date: Oct 2007
Location: Port Townsend, Washington State, USA
Posts: 3,659
Its remarkably easy to have things happen which will stop the flash. Perhaps:

a. the shutter speed crept above 1/180s and you didn't notice (happened to me more than once)

b. If the flash is not locked down against the hot shoe, its possible for the flash to creep slightly out of the hotshoe, not enough to fall off, but enough to disengage the hot pin from its contact. (happened to me more than once)

if either of these conditions happened, and you inadvertently fixed the problem without noticing - it'd be a mystery.

If your system is working now, then thats a good trend

09-04-2011, 11:45 PM   #5
Pentaxian




Join Date: Jul 2011
Location: Eastern Oregon
Posts: 615
Original Poster
QuoteOriginally posted by philbaum Quote
Its remarkably easy to have things happen which will stop the flash. Perhaps:

a. the shutter speed crept above 1/180s and you didn't notice (happened to me more than once)

b. If the flash is not locked down against the hot shoe, its possible for the flash to creep slightly out of the hotshoe, not enough to fall off, but enough to disengage the hot pin from its contact. (happened to me more than once)

if either of these conditions happened, and you inadvertently fixed the problem without noticing - it'd be a mystery.

If your system is working now, then thats a good trend

MYSTERY SOLVED! WELL DONE!

The shots where the flash quit working were at 1/400th and 1/500th, and I just replicated the issue. The hot shoe shuts off when the shutter speed exceeds 180th. It only seemed like it was somehow related to the WB at the time, but the WB had nothing to do with it. In the heat of the shoot, I didn't want to troubleshoot this. But I suspected it might be something like this...

Thanks!!!!
09-05-2011, 12:54 AM   #6
Pentaxian
wizofoz's Avatar

Join Date: Apr 2009
Location: Melbourne, Outer east.
Photos: Gallery | Albums
Posts: 1,655
I have had the same thing happen to me, twice (but a year apart, so I had forgotten what the cause was.) It's true that the hot shoe shuts off at speeds above sync except if you have the flash and camera set up for High Speed Sync. HSS speeds are unlimited, but the flash power is greatly diminished.
09-05-2011, 07:57 AM   #7
Loyal Site Supporter
Rupert's Avatar

Join Date: Sep 2006
Location: Texas
Photos: Gallery | Albums
Posts: 24,701
Otis would like to award you an honorary degree in "User Error". Don't feel bad, I have several dozen of them hanging on my office walls....Otis gives me a new one most every day or two.....

Otis advises....RTFM!
[IMG] [/IMG]

Regards!
09-05-2011, 08:27 AM   #8
Veteran Member
octavmandru's Avatar

Join Date: Jan 2009
Location: somewhere around
Posts: 615
OMG, Rupert...
Otis Review strikes again.

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!
awb, camera, custom, dslr, flash, k-5, k-5 ii, k-5 iis, k5, pentax k-5, shoe, wb
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Hot shoe question Gerrys Troubleshooting and Beginner Help 9 10-21-2010 05:54 PM
Wanted - Acquired: Wein Hot Shoe to Hot Shoe Safe Sync HSHSB 990-560 excanonfd Sold Items 0 08-26-2010 10:56 AM
Hot Shoe Covers Alfisti Pentax DSLR Discussion 29 06-10-2010 03:19 PM
Hot shoe question Rondec Pentax DSLR Discussion 9 11-03-2009 10:21 PM



All times are GMT -7. The time now is 10:35 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