[Prev][Next][Index][Thread]

Re: (meteorobs) Normal lens



In a message dated 97-03-21 11:49:46 EST, you write:

<< 
 ie: Catagory "B" :  Normal lenses, with F-ratios of F-1 to F-3.5 and focal
 lengths of 50mm, (the normal 35mm lens) to 200mm, (the common aero camera
lens)
 Both standard 35mm cameras and aero cameras fall into this catagory.
  >>
-------------------
Ed,
Okay....if we used a 35mm camera with it's normal lens...the 50mm at f/1.4
for example. Would you get a good spectra with a variety of emission lines as
good as let's say if you used a telephoto 135mm f/2.8? This is assuming that
a sufficiently bright meteor crosses the field. Would you see more lines with
the 135mm than the 50mm? How about a 200mm at f/3.5 compared to the 50mm? I
know for the 200mm that the area of coverage is smaller, but would you see
more lines if the meteor was bright enough?
George Zay