Quote Originally Posted by wiltw View Post
"An incident meter has no means of knowing what it is looking at or what it is metering, and furthermore doesn't care." For that reason, if we have bright highlights which would overexpose and wash out detail in the color transparency, we end up with clear base and no details. (The same exposure with color neg would be well tolerated due to it tolerance to overexposure.)
If you take your incident reading in the light that is creating those highlights, the transparency film will most likely record detail, because that is what it its speed rating is designed to ensure. The only exception would be specular highlights, where there aren't any details anyways, or other extremely reflective surfaces.

While it is true that the range of the transparency film is limited, an incident reading will generally ensure that your exposure is well centred on the range available in the subject. If necessary, when the range is too wide for the film's capabilities, you can decide to adjust the exposure to favor highlight detail at the expense of the shadows.

Spot meters are excellent when used by those with experience and excellent specialized judgment. If you don't have a spot meter, or you don't have that experience or the specialized judgment, an incident meter will give you a much higher percentage of good exposures than other reflected light meters.