That should read 'Not 'nuff said'

'nuff said.

I guess that this lighting scenario would need a white reference (white card or clothing) in every shot. Difficult.

He is quite correct. Tungsten lighting does not have time to 'turn off' when the current drops to zero, which it does 100 times a second if the ac supply frequency is 50Hz. 120 times a second if it's 60 Hz.
Flourescent lighting however does actually turn off, but the eyes can't percieve this 'flickering' when they are trying to resolve an image, but the human brain can in the following scenario.

Some people who use CRT computer screens in a flourescent lighting environment suffer headaches. Quite often, a CRT/computer screen is refreshed at 60Hz. The mains ac frequency in UK is 50Hz. The difference between the flourescent lights (50Hz) and the screen refresh (60Hz) causes the screen to appear to flicker, or beat, at 10Hz. A frequency that some people can't handle, hence the headache (the solution is to change the refresh rate to 70Hz or higher).

A camera however can quite easily take an accurate WB reading as long as an appropriate shutter speed is selected to avoid this 'dead zone' in flourescent lighting.

1 second = 1000 milliseconds, 50HZ = 1000/50 = 20 milliseconds or 1/50 seconds. Choose a shutter speed of 1/50th or slower, and you'll not have a much of a problem getting an accurate WB setting. In 1/50th of a second, UK mains supply has gone from 0 - max - 0 - min - 0. The camera, in WB terms, will record the average.

I'll leave you US users to do the maths for 60Hz supplies.

Of course, at the time an image is recorded, possibly using a faster shutter speed, the temparature of the light may well be different to that which has been used as WB but hey, that's a photographer's lot, use flash.

There is a simple solution to this problem. Take a photographer's white/grey card with you and set the WB manually before the event. A better solution is the Expodisc (or is it Expodisk).

Any 'thinking' camera is bound to get it wrong sometimes. Using a known white subject eliminates the problem.

Strewth, awesome selection criteria. I'm impressed. . . and not easily I might add. . . but I still don't have a mac.

Wicked. I don't have a mac though

Don,

Lightroom can select by most of the commonly used EXIF fields including shutter speed, aperture etc. Can Aperture show you the images shot with a particular lens set to a particular focal length? Lightroom can't do that . . . yet.

So, you haven't found a way to do it either

It can be done by using Keyword Tags, but that's a lot of work . . . unless the process could be automated somehow.

Lightroom's metadata browser facilitates searches by Camera, Lens, File type, Aperture, Shutter speed, ISO setting, Date, Location, Creator, and each of 5 coloured labels.

I haven't found a way to browse by focal length yet.

Sadly, Sigma lenses are logged as just that, 'Sigma'.
Pentax K,M lenses listed as 'K,M Lens'.
Pentax A, listed as 'A Series Lens'.
SMCP F lenses and newer are recorded correctly.