Welcome to the photo-3d anonymous ftp site. 3d-faq.ps.Z is a compressed Postscript file of a Framemaker file created and maintained by Joel Alpers (Joel.Alpers@FtCollinsCO.NCR.COM). 3d.prod.serv is a list of Products and services created and maintained by Tim Klein (timk@meaddata.com). The .Z version of the file is compressed. PStc.expl is a text explanation of the Postscript camera lens test charts, PStc1.25.Z and PStc1.6.Z. archive_1.Z is the archive of the proceedings of the mailing list. dpthfld.ps.Z is a Postscript file of Linhof's depth of field chart. photometry is some notes on light and measuring light created a long time ago by John Bercovitz (JHBercovitz@lbl.gov) who will attempt to answer questions on it if his memory is up to it. raytrace.ps.Z is a compressed Postscript file of notes on how to trace a ray of light through a lens. Created by John Bercovitz. wratten.filters is a text list of Wratten filters and some of their uses/ specifications. Information was gotten from the CRC Handbook of Chemistry and Physics, a Hoya brochure, and a Kodak brochure. John Bercovitz (JHBercovitz@lbl.gov)