K7 Shutter Speed on Radio Triggers

Gigahz · 03-04-2010, 12:06 AM

Any luck reaching more than 1/180s? havent tried it yet

coelhom · 03-04-2010, 12:33 AM

The K-7 can't sync past 1/180 of a second.
There's no way you're going to get it to sync with a flash at a faster shutter speed than that. Even if you set it to 1/200 or 1/500, it just won't fire.

hcc · 03-04-2010, 01:54 AM

There is an unsual way to resolve a fast synchronisation with a flash. Use the camera in full manual (aperture, shutter, focus) with a flash On in a dark room (or in the darness of night). You need total darkness for the best result and a fast flash can help to get very sharp photograph.
I was able to get some nice shots this way with an older Pentax film camera, and I was able to do the same with the FZ-20. I have not tried the K-7 but it should definitely work.
Hope that the comment might help...

flyer · 03-04-2010, 02:52 AM

It won't work.

amoringello · 03-04-2010, 04:06 AM

Yeah sadly, other brands will let you use flash above their sync speed. This results in seeing the shutter in the frame and therefore a dark band comes into frame. This can be used to good effect, but Pentax actually disables the hotshoe and sync port above 1/180! Argh!!

Note also that some remotes may have a hard time syncing with the camera's max sync speed. (i.e. eBay and Elinchrom Skyports... hard to sync above 1/125 - search for my other rant on Elinchrom if interested)

Gigahz · 03-04-2010, 06:34 AM

will try to test later, as far as i remember my K20D syncs at 1/250 with ebay triggers

kenyee · 03-04-2010, 08:34 AM

won't work...k20d doesn't send sync signal over 1/180 as well nor did my old k10d.

There's hack if you have a pentax flash...run HSS, then connect the trigger to your flash's PC port. You'll have fun metering unless you overpower the flash w/ studio strobes...

amoringello · 03-04-2010, 03:30 PM

Originally posted by kenyee

There's hack if you have a pentax flash...run HSS, then connect the trigger to your flash's PC port. You'll have fun metering unless you overpower the flash w/ studio strobes...

Very cool and obvious idea! (hitting self in head for not thinking of it)
I will definitely try that. A little duct tape over the flash couldn't hurt, could it? :-)
Of course at the power that HS sync allows, probably not much issue overpowering the light, so I won't have to tape over it and risk what might result.

Gigahz · 03-04-2010, 11:17 PM

Originally posted by kenyee

won't work...k20d doesn't send sync signal over 1/180 as well nor did my old k10d.

There's hack if you have a pentax flash...run HSS, then connect the trigger to your flash's PC port. You'll have fun metering unless you overpower the flash w/ studio strobes...

Nice find will try it later

thanks

Wheatfield · 03-05-2010, 08:57 AM

Consider the flash duration when you try stuff like this. A lot of powerful flash units have remarkably long pulse times, often in around 1/200 second.

amoringello · 03-07-2010, 02:10 PM

ARGH!!! I Hate Pentax engineers!!!!
The PC sync socket is shut off when Hi-Speed Sync is enabled.

Guess I need to do a real hack and break some parts to see what I can piece together. It makes sense that if I could get at the middle pin, it could fire another flash as well.

It just sucks that Pentax cripples their higher end cameras!!

kenyee · 03-07-2010, 07:37 PM

Originally posted by amoringello

ARGH!!! I Hate Pentax engineers!!!!
The PC sync socket is shut off when Hi-Speed Sync is enabled.

You don't connect the other trigger to the pc sync socket on the body...you connect it to the pc sync port on the flash...

the 540 flash has an external 5P sync port, so you'd have to get an adapter for this to your trigger...

amoringello · 03-08-2010, 03:03 AM

Originally posted by kenyee

the 540 flash has an external 5P sync port, so you'd have to get an adapter for this to your trigger...

Hopefully that will work. I'm still pissed that Pentax cripples their cameras.

netrex · 03-08-2010, 05:42 AM

Get a manual lens with leaf shutter (you need an adapter as well), they'll sync to 1/500th :P

03-04-2010, 12:06 AM	#1
Gigahz Senior Member Join Date: Dec 2007 Location: Singapore Posts: 100	K7 Shutter Speed on Radio Triggers Any luck reaching more than 1/180s? havent tried it yet

03-07-2010, 07:37 PM	#12
kenyee Veteran Member Join Date: Mar 2007 Location: Boston, PRofMA Photos: Albums Posts: 3,026	Originally posted by amoringello ARGH!!! I Hate Pentax engineers!!!! The PC sync socket is shut off when Hi-Speed Sync is enabled. You don't connect the other trigger to the pc sync socket on the body...you connect it to the pc sync port on the flash... the 540 flash has an external 5P sync port, so you'd have to get an adapter for this to your trigger... Last edited by kenyee; 03-07-2010 at 07:53 PM.

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03-04-2010, 12:33 AM	#2
coelhom Junior Member Join Date: Oct 2009 Location: Montreal Posts: 35	The K-7 can't sync past 1/180 of a second. There's no way you're going to get it to sync with a flash at a faster shutter speed than that. Even if you set it to 1/200 or 1/500, it just won't fire.

03-04-2010, 01:54 AM	#3
hcc Pentaxian Join Date: Nov 2009 Location: Brisbane, Australia Photos: Gallery \| Albums Posts: 4,005	There is an unsual way to resolve a fast synchronisation with a flash. Use the camera in full manual (aperture, shutter, focus) with a flash On in a dark room (or in the darness of night). You need total darkness for the best result and a fast flash can help to get very sharp photograph. I was able to get some nice shots this way with an older Pentax film camera, and I was able to do the same with the FZ-20. I have not tried the K-7 but it should definitely work. Hope that the comment might help...

03-04-2010, 02:52 AM	#4
flyer Veteran Member Join Date: Jan 2008 Location: Ste-Anne des Plaines, Qc., Canada Posts: 2,013	It won't work.

03-04-2010, 04:06 AM	#5
amoringello Veteran Member Join Date: May 2008 Location: Virginia, USA Photos: Gallery Posts: 1,562	Yeah sadly, other brands will let you use flash above their sync speed. This results in seeing the shutter in the frame and therefore a dark band comes into frame. This can be used to good effect, but Pentax actually disables the hotshoe and sync port above 1/180! Argh!! Note also that some remotes may have a hard time syncing with the camera's max sync speed. (i.e. eBay and Elinchrom Skyports... hard to sync above 1/125 - search for my other rant on Elinchrom if interested)

03-04-2010, 06:34 AM	#6
Gigahz Senior Member Join Date: Dec 2007 Location: Singapore Posts: 100 Original Poster	will try to test later, as far as i remember my K20D syncs at 1/250 with ebay triggers

03-04-2010, 08:34 AM	#7
kenyee Veteran Member Join Date: Mar 2007 Location: Boston, PRofMA Photos: Albums Posts: 3,026	won't work...k20d doesn't send sync signal over 1/180 as well nor did my old k10d. There's hack if you have a pentax flash...run HSS, then connect the trigger to your flash's PC port. You'll have fun metering unless you overpower the flash w/ studio strobes...

03-04-2010, 03:30 PM	#8
amoringello Veteran Member Join Date: May 2008 Location: Virginia, USA Photos: Gallery Posts: 1,562	Originally posted by kenyee There's hack if you have a pentax flash...run HSS, then connect the trigger to your flash's PC port. You'll have fun metering unless you overpower the flash w/ studio strobes... Very cool and obvious idea! (hitting self in head for not thinking of it) I will definitely try that. A little duct tape over the flash couldn't hurt, could it? :-) Of course at the power that HS sync allows, probably not much issue overpowering the light, so I won't have to tape over it and risk what might result.

03-04-2010, 11:17 PM	#9
Gigahz Senior Member Join Date: Dec 2007 Location: Singapore Posts: 100 Original Poster	Originally posted by kenyee won't work...k20d doesn't send sync signal over 1/180 as well nor did my old k10d. There's hack if you have a pentax flash...run HSS, then connect the trigger to your flash's PC port. You'll have fun metering unless you overpower the flash w/ studio strobes... Nice find will try it later thanks

03-05-2010, 08:57 AM	#10
Wheatfield Moderator Join Date: Apr 2008 Location: The wheatfields of Canada Posts: 15,987	Consider the flash duration when you try stuff like this. A lot of powerful flash units have remarkably long pulse times, often in around 1/200 second.

03-07-2010, 02:10 PM	#11
amoringello Veteran Member Join Date: May 2008 Location: Virginia, USA Photos: Gallery Posts: 1,562	ARGH!!! I Hate Pentax engineers!!!! The PC sync socket is shut off when Hi-Speed Sync is enabled. Guess I need to do a real hack and break some parts to see what I can piece together. It makes sense that if I could get at the middle pin, it could fire another flash as well. It just sucks that Pentax cripples their higher end cameras!!

03-08-2010, 03:03 AM	#13
amoringello Veteran Member Join Date: May 2008 Location: Virginia, USA Photos: Gallery Posts: 1,562	Originally posted by kenyee the 540 flash has an external 5P sync port, so you'd have to get an adapter for this to your trigger... Hopefully that will work. I'm still pissed that Pentax cripples their cameras.

03-08-2010, 05:42 AM	#14
netrex Senior Member Join Date: Apr 2009 Location: Alta Photos: Gallery \| Albums Posts: 279	Get a manual lens with leaf shutter (you need an adapter as well), they'll sync to 1/500th :P