I have now finished my shot as planned. Mainly a product shot for the glasses but a bottle of veuve champagne with orange label to provide interest. I won the champagne in the draw at a corporate exhibition so this was a no cost photo as per the brief with Don. Motivation is on the glasses and the champagne bottle is intentionally blurred
Two lessons learned and figured out as below.
1 - Sync Speed
Upto now I have been using aperture priority for my flash shots and some ambient light was contributing to the overall exposure of the scene. The shot with the glasses was very difficult with regard to controlling stray light from the window only 1m to the left of the setup. Yesterday (above) I used black flags and near darkness to achieve the result and today I experimented with sync speed. The sync speed is the fastest the camera can 'sync' with the flash output and the higher reduces any effect from ambient light such as reflections from windows, walls and other objects in the room. A test shot of the scene manual mode 1/250 f13 produced a totally black image, even in RAW with +2EV nothing was evident as a reflection. Therefore I could continue with the shoot in daylight without interference.
2 - Snoot
The construction of a snoot (pictured) allows a beam of light to be finely directed to the label and by limiting the diameter of the snoot to the vertical height of the label only label is lit and no artifacts are present on the bottle or glasses. The power of the secondary flash through the snoot was set 1/16 although starting at full power and lowered toward 1/16.
Put all that together and include above rounds off a weekend of flash photography where two major lessons have been learned.
Please ignore champagne in the glasses this was something extra but did not workout.
Final result here
http://www.worldphotographyforum.com...hp?photo=11266