Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Pentax / Samsung dSLR, K Mount Mirrorless

Thread Tools Search this Thread
Old Oct 7, 2010, 2:11 PM   #11
Senior Member
snostorm's Avatar
Join Date: Jan 2004
Location: Chicago Suburb, IL, USA
Posts: 2,770

Originally Posted by VTphotog View Post
Just setting your camera to manual exposure will prevent the pre-flash, and let you use the unit as slave. You are most likely going to need an ambient light meter to get the exposure right, or an awful lot of patience.

BTW, the power rating on strobes is usually given in W/s and is a measure of the energy (joules) of the flash. 120 W/s for a time of 1/1000s gives a lighting equivalent of 1200 watts. Not too dim.

Have fun with the gear. Should be fun getting over the learning curve.
Hi Brian,

Setting the camera to M mode will not prevent the preflash, but using a fully manual lens will. Any "A" capable lens will revert the flash to P-TTL automatically, whatever exposure mode you might want to use. I use M mode and AE lock ont the AF point as the easiest way to balance ambient with P-TTL flash and this works fine for me.

The AF 540 FGZ does have an Auto Thyristor mode though, and this or Manual mode will eliminate the preflash, so the slave sensor in the Britek will fire on exposure correctly since there is only the single flash. In Auto mode, you might even be able to utilize some flash exposure automation, but it'll take some experimentation.

I'm not familiar with studio strobes and how they are rated, so thanks for the info. I was just going by reviews on the web, and they stated that this unit wasn't very powerful, so I just went with that. . .but power is always relative. . .

snostorm is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 2:56 PM.