Home / NEWS

My Equipment

Picture Gallery

Skywatch

Others
Links
Tests - Tips
 

header2
 

Tips and Tests for Lunar Eclipse

LUNAR ECLIPSE EPOSURE RECOMMENDATIONS (Kodak Astrophotography basics)
             
ISO>>>>>> 100 200 400 800 1600  
Stage of Eclipse              
             
Full moon   1/250 1/250 1/250 1/500 1/1000 Exposure
  F11 F16 F22 F22 F22 Focal length
             
Penumbra up to first contact 1/60 1/60 1/125 1/250 1/500 Exposure
and after fourth contact F11 F16 F16 F16 F16 Focal length
             
2nd and 3rd Contact 1 1 1/4 1/8 1/15 Exposure
  F2.8 F4 F2.8 F2.8 F2.8 Focal length
             
Mid Totality   2 2 1 1/2 1/4 Exposure
  F2 F2.8 F2.8 F2.8 F2.8 Focal length
             
             
             
You can calculate exposure times for F-numbers other than given in the table above.
Suggest your lens opening is F5.6 and the table suggests F2.8
Divide 5.6 by 2.8    and square the result
In reality: 5.6:2.8  = 2   2x2 = 4     Means you have to expose 4 times longer!

Movement of the moon is calculated:
(if you are exposing without an equatorial telescope mounting)

(Focal length of normal lens) / Focal lenght of tele lens) x 10  = maximum exposure of Moon to stay sharp!
In reality: Tele of 400mm  
( 50 : 400) = 0.125    0.125 x10 = 1.25 Seconds maximum exposure