Both reflectance and incidence are normally general measurements, which are not as good as spot meter readings which define a small area of a scene. As I have pointed out the zone system is not complicated, that is unless you want to be really precise, and calibrate all you equipment for example. For those of us who can use it-the idea that it reduces creativity is foolishness, you can simply stop using it. The results produced from those who can use it well are masterly. http://www.lensculture.com/blakemore.html --- Rollei List - Post to rollei_list@xxxxxxxxxxxxx - Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe' in the subject field OR by logging into www.freelists.org - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with 'unsubscribe' in the subject field OR by logging into www.freelists.org - Online, searchable archives are available at //www.freelists.org/archives/rollei_list