Re: [APML] Speaking of E100 and Velvia

[Robert Reeves <reeves10@swbell.net>]

> Robert,
>
> I've tried pushing E100VS a couple of times, once +1 and once +2. Both
> results were O.K. but the film seemed more suited to +1, at +2 the film
lost
> a little too much for daylight use. For what is worth, I think I heard
that
> Kodak was discontinuing E100S and E100SW, but E100VS would still be
> around... What kind of exposure times can one get on the ISS before
> trailing?
>
> Frank
> http://www.my-spot.com

Hi Frank,

I have relayed your experience with the E100 to Dr. Pettit.

As far as exposure times from the ISS, he is limited to about 5 seconds
without any kind of traking.  He is taking up a barn-door type of mount
which he will be able to expend his exposures to one minute before look
angles get weird out the window.  Remember, he will be travelling around the
world every 90 minutes, so apparent sky motion will be highly maginfied.

I think the most excitting astrophoto prospect for his flight will be the
Leonid storm.  ISS will be over Europe during the first wave, and over the
US durring ther second wave.  Talk about prime seats for the meteor show!
He has two options, one is to aim down and shoot the meteors against the
dark Earth below, along with the landscape illumined by dim moonlight and
city lights streaking by.  Or he can aim along the horizon, looking through
a much larger cross section of atmosphere, and therefore gather more meteors
per exposure.  Exposure limitations will be less stringint with the horizon
option.

I am really looking forward to his images from space!

Robert Reeves                      reeves10@swbell.net
520 Rittiman Rd.                   www.robertreeves.com
San Antonio, Texas 78209    210-828-9036
USA                                     29.484  98.440  200 meters


--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>