J. Daniel

try set your strobe to menu 1 or 2 and try.......

Thanks, Wolf Eel, With the strobe set on manual 2 it fires when I tested it with the G11 in manual mode. I was using the strobe's manual 1 setting as this is where I had it set and where it works whenI set the camera to Aperture priority. Interestingly, I tried the flash on manual 2 and the G11 in Aperture priority-- the strobe fired but gave insufficient light to expose the image (even though strobe was set for full power). Using the  same camera settings and  the strobe set  back on manual 1, the image received sufficient strobe light for proper exposure. Go figure that, in both situations the strobe appeared to be flashing with the same intensity.
J. Daniel

Daniel,TTL is NOT working on the G11 while in M mode and this may be the problem.
I use Av or Tv mode and ttl-exposure works mostly fine.
Do a search on the photography forum @ scubaboard.com and you will find exhaustive posts about
that issue of Canon P&S.
Chris

Thanks Chris I will follow up on this.
Dan

Most likely in manual it will not fire a preflash..

So you may need to change the settings of the 110a accordingly.

Thanks for the suggestion, however I do not know how to do this. The G11 provides a pre-flash and I have set the Y-110a accordingly and it works when I am in Aperture Priority. I cannot find anything in either manual that describes any other way to set the Y-110a to respond to the pre-flash.
Dan

Why did you have the camera set to Macro mode when you're filming large animals 4-5ft away?


It's possible that the lack of contrast caused the camera to hunt more, but as you say, why were the others getting their shots off. And why did it work further away?

Can you post the EXIF data on one of the shots that came out?

The G11 is set to macro mode because the manufacture of the FIX housing and fisheye lens and the retailer (Backscatter in Monterey Ca) state that this is what you do. I also use Aperture Priority more often than Manual. Interestingly, I tested the set up on land the other day using my adult daughter (5' 7"), standing 3' from the lens and took three photos with three different settings-- macro, normal and manual focus. They came out identical  and can only tell the difference by checking Exif 'focus mode' that shows "0" for manual and a "1" for macro and normal.
Here is a the Exif data for a photo of a shark in focus and at about 15-20 distance. Dan (Incidentally do you have a reference that provides a detailed data sheet for the tags and fields for the G11 Exif data?)

Aperture Value: 4.34375
Color Space: sRGB
Compressed Bits Per Pixel: 3
Custom Rendered: Normal process
Date Time Digitized: 2010:11:04 06:36:12
Date Time Original: 2010:11:04 06:36:12
Digital Zoom Ratio: 1
Exif Version: 2.2.1
Exposure Bias Value: 0
Exposure Mode: Auto exposure
Exposure Time: 1 / 60
Flash: Flash fired, compulsory flash mode, red-eye reduction mode
FlashPix Version: 1.0
FNumber: 4.5
Focal Length: 6.1
Focal Plane Resolution Unit: inches
Focal Plane X Resolution: 12493.15
Focal Plane Y Resolution: 12493.15
ISO Speed Ratings: 200
Max Aperture Value: 2.96875
Metering Mode: CenterWeightedAverage
Pixel X Dimension: 3648
Pixel Y Dimension: 2736
Scene Capture Type: Standard
Sensing Method: One-chip color area sensor
Shutter Speed Value: 5.90625
White Balance: Auto white balance
_ImageStabilization: 3
AFInfo: 0.45, 0.45, 0.1, 0.1, f
Firmware: Firmware Version 1.00
Flash Compensation: -2
Focus Mode: 1
Lens ID: 65535
Lens Info: 6.1, 30.5, 0, 0
Lens Model: 6.1-30.5 mm