Greetings All, Hope everyone has recouped from Christmas and is ready for New Year's celebrations! My questions come from the brochure for the F100. It is now available on-line in PDF format from Nikon USA: http://www.nikonusa.com/products/products.taf?id=244 Towards the bottom you'll see the "Click here to download" links. When you get to the "Nomenclature/Controls" page (pdf page 10 of 12), you'll see on the back view of the body, on the left hand side there is a button next to the "CSM" button that is for, "Shutter speed/aperture lock button." Anyone know how/when/why this works/you use it/it's provided? Second question is a little more disconcerting. On pdf page 11 (brochure page 20, "Nikkor Lenses") there is the lens compatibility chart. The Metering System for AI-type Nikkors is, as expected, CW and spot modes only. But if you look closely, both have a footnote of #7 which reads, "Exposure compensation may be necessary." ?! This is something new -- the N90s brochure has no such footnote. Does anyone know why AI/AIS lenses may require compensation? Is this true of the F5 as well? *sigh* Slowly but surely they're chipping away at the backward compatibility. What happened to no planned obsolesence? Regards, Chris -- The mindless and ungrateful | Christopher Somers go to sleep | Rise Technology so they can rise fully rested | www.rise.com and spiritually impoverished. (Tim Cahill) +----------------------------- | Gallery: www.flash.net/~jboy