[Prev][Next][Index][Thread]
Re: (meteorobs) Re: T-max 3200 film, Questions
Thanks Ed,
I would have liked to try a larger format, such as 4 X 5, except for
the problems in obtaining parts and film here. E-bay internet
shopping most of the time doesn't work for me, and I haven't had much
success finding either a book that covers design or construction of a
basic camera, or an affordable supplier of the basic parts. Maybe I'm
too far removed from astronomy - I'm the only one active in astronomy in
my town.
In my favour, we have some aluminum and brass round stock, a lathe, and
tools/material for aircraft structural repair at work - I teach avionics
at the local college. If I had an idea of what I was doing, I'd have
half a chance of doing it :-)
Ron (in Gander)
epmajden wrote:
I
> >prefer a basic medium format camera and would like to build my own.
> >Does anyone know where I may find information on how to build or where
> >to buy shutters?
> >
>
> Ron:
> I have made a number of meteor cameras, (most have been convered into
> spectrographs), by using surplus aero lenses such as the Kodak Aero Ektars.
> These lenses, in most cases don't have internal shutters as the aero cameras
> they were mounted on, used focal plane shutters. I simply use a hinge
> mounted flap that covers the lens when you change plates. I use 4X5 cut
> film in standard film holders. The dark slide in the holders cover the film
> and is removed just before commensing the exposure. You don't need a
> conventional shutter. You could even automate such a shutter by using an
> occulting disk infront of the lens. It could be switched in and out using a
> selonoid type of device if you did not want to operate this make shift
> shutter manually. Such a disk shutter would not interfere with a chopping
> shutter should you mount one infront of your camera for velocity studies.
>
> Ed Majden
>
> To UNSUBSCRIBE from the 'meteorobs' email list, use the Web form at:
> http://www.tiacdot net/users/lewkaren/meteorobs/subscribe.html
--
R & L Thompson, 9 Medcalf St., Gander, NF, Canada A1V 1R9
Tel (709) 256-1179, Fax (709) 256-8638, e-mail rlthompson@thezonedot net
Amateur Radio Station call VO1AV, FP5EK, VE1KM Grid Square GN28qw
Location 48 57'08" N 054 36'43" W,
Local time UTC - 2.5 hrs Summer, UTC - 3.5 hrs Winter
To UNSUBSCRIBE from the 'meteorobs' email list, use the Web form at:
http://www.tiacdot net/users/lewkaren/meteorobs/subscribe.html
References: