Canon 550d RDX550d and ys110a

Ask about gear, cameras, lenses, technique or lighting

Moderators: tswinner, bvanant

Postby Xkey » Tue Apr 03, 2012 2:14 pm

Hi

Ive just made the plunge into the DSLR market and received my RDX550d housing today.

Ive attached the optical lead to fire my s&s ys110a manually and messed with the strobe switches but i cant seem to get the strobe not to fire when the cameras internal flash does its multi flash sequence for metering.

Is there a setting to stop the pre flash sequence
or
an other way round this?

Any help would be much appreciated

Thanks Xkey
Xkey
Xkey
 
Posts: 6
Joined: Mon May 23, 2011 1:23 pm

Postby bvanant » Wed Apr 04, 2012 10:10 am

The 110a has three modes. manual 1, manual 2 and TTL. Start out with the camera in TTL mode and the strobe in TTL mode and you should be fine. If you want to shoot the strobes in manual mode then you need to set the camera internal strobe to manual not ETTL. In that mode there is no pre-flash from the camera and you should use manual mode 2 (no pre-flash). But you will also need to turn off the auto-focus assist mode on the camera (custom functions) otherwise the camera will fire the strobe to help the autofocus. You will need a good autofocus light to get focus in that case.
Hope this helps
Bill

Bill Van Antwerp Canon/Nauticam/Subal/Inon Lots of glass


Technical Advisor to Bluewater Photo


http://www.blueviews.net

User avatar
bvanant
 
Posts: 309
Joined: Wed May 12, 2010 4:16 pm
Location: Los Angeles (more or less)

Postby Xkey » Sat Apr 07, 2012 1:39 pm

thanks for the quick reply Bill much appreciated

Ive located the C.fn and Disabled the autofocus/drive, AF - assist beam firing.

But the ETTL is still grey'd out and cant change it.

The assist beam now doesn't fire is it necessary that ETTL is turned off?

Thanks again
Xkey
Xkey
 
Posts: 6
Joined: Mon May 23, 2011 1:23 pm

Postby bvanant » Tue Apr 10, 2012 9:47 am

In the camera manual mode, you should be able to set the internal strobe to either eTTL or to manual. What camera mode are you in?
Bill

Bill Van Antwerp Canon/Nauticam/Subal/Inon Lots of glass


Technical Advisor to Bluewater Photo


http://www.blueviews.net

User avatar
bvanant
 
Posts: 309
Joined: Wed May 12, 2010 4:16 pm
Location: Los Angeles (more or less)


Return to Underwater Photography Questions

Who is online

Users browsing this forum: No registered users and 7 guests