very good. thanks.
----- Original Message ----- From: Guillermo <pen...@home.com> To: <pinhole-discussion@p at ???????> Sent: Monday, October 29, 2001 2:34 PM Subject: Re: [pinhole-discussion] Zone Plate Focus stringency > > ----- Original Message ----- > From: "TSHACK" <tsh...@silver-bayou.com> > > > That was going to be my question. > > When you focus a lens using a ground glass, you are just making coincide > the -ideally- flat image the lens is projecting with the surface of the > ground glass, if you remove the ground glass, your eyes can't see the image, > but the image is still there focused "in the air". If you take a loupe and > make its base coincide with that image "in the air", in other words, with > the "Aerial Image", you will then see the the exact same image your film > will see. This is best seen in axis with the lens. If your camera has GG, > remove it an install a piece of clear glass, this will allow you to rest the > loupe steady, otherwise, you will have to rely on your steady hand. > > Again, you will probably be surpriced of what you see. > > Guillermo > > > _______________________________________________ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??????? > unsubscribe or change your account at > http://www.???????/discussion/ >
