Hello I. Zarkov! (it is Igor?) The use of EM grids is not my idea. I got fascinated with it after visiting Chris Patton's pinhole pages. And, since he is from the same institute as I am, initially I thought, he is from the same campus and started communication with him about using the grids, so idea is his. I am attaching a link below about the purchase and price. I don't have any more grids, I got few from Chris and they are installed on my brass plates already. I am using 100uM grid (actually, it is not a grid, it is a single circular hole, as against to our usual 'grid' grids of EM). I tried 75uM that Chris sent me and it was creating too much diffusion (~6 Inch focal length body). I had pasted the link before but here is my link using this grid again along with purchase links: thanks, achal http://photos.yahoo.com/achalpashine (click on pinhole day) http://www.stanford.edu/~cpatton/ems.htm http://www.emsdiasum.com/ems/grids/gilder.html
Achal Pashine Pediatric Immunology Center for Clinical Sciences Research, Room 2120 269 Campus Drive Stanford, CA 94305-5164 Tel: 1-650-498-7574 FAX: 1-650-498-6077 ----- Original Message ----- From: "I Zarkov" <dr_izar...@hotmail.com> To: <pinhole-discussion@p at ???????> Sent: Wednesday, July 24, 2002 5:37 AM Subject: Re: [pinhole-discussion] pinhole size > Achal, > How big is the size of the openings within the grids? As I remember from > years ago the size may be variable depending on the slot types of EM grids. > I imagine that you're using apertures of less than 500 nm. Or do I > misunderstand you and you use the whole circular grid as the pinhole lens? > Thanks > I. Zarkov > (former EM tech) > > _________________________________________________________________ > MSN Photos is the easiest way to share and print your photos: > http://photos.msn.com/support/worldwide.aspx > > > _______________________________________________ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??????? > unsubscribe or change your account at > http://www.???????/discussion/
