Archived posting to the Leica Users Group, 2000/01/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]A thermonuclear-pumped flash? Have you no concern for the environment? Just think about the noise that thing will make, not to mention small secondary side effects such as fall out! No, the right way to go is to use a GN 11 ISO 100/m flash and the new 50mm f:0.000000036 Noctilux. :) Now back to my well-deserved lurkerhood. Amilcar Paul Chefurka wrote: > Oops! I forgot about the round-trip delay. So I guess I'll need to use > rear-curtain sync with a 3-second exposure (186,000 mps over a total > distance of ~472,000 miles gives about 2.5 seconds...) Photographers are so > busy thinking about the quality of light they neglect little details like > the speed of light. > > By the way, does anyone know where I can get a sync cord that will connect > an R8 to Leica's Mark 52 thermonuclear-pumped full-spectrum optical twinky > laser? I looked in the box, and it seems they forgot to pack it. Yet > another example of the shoddy quality control at Solms, I guess. I just > hope the darn thing goes off when I push the button... > > Paul Chefurka > > >-----Original Message----- > >From: John Collier [mailto:jbcollier@home.com] > >Sent: Wednesday, January 19, 2000 3:53 PM > >To: leica-users@mejac.palo-alto.ca.us > >Subject: Re: [Leica] Exposure for eclipse of moon ? > > > > > > > >>> Paul Chefurka wrote: > >>> > >>>> Ted, you'll probably know the answer to this. If I wanted to > >>> shoot the > >>>> eclipse using twinky flash, what sort of guide number would I > >>> need to expose > >>>> the moon properly on Velvia??? ;-) >>>>>>> > > > >Do not forget that it takes time for the light of your > >flash/laser to reach > >the moon and get back. Check with NASA but I seem to recall a > >2 second delay > >during radio contact with Apollo 8. Maybe I will run off some > >test rolls > >tonight and get back to you. ;-) > > > >John (never been more serious in his life) Collier > >