Vixen Eyepiece Projection Camera Adapter - Manual (Page 4)

Duration of the Exposure
The table below is an example for standard exposure duration with use of ISO400 films.
If ISO 100 films are used, increase the value by 4 times. (Unit: Second)
If ISO1600 films are used, decrease the value by a fourth.
Taking photos of a Lunar Eclipse
Duration of the exposure varies as the moon wanes and waxes during an eclipse. An
appropriate exposure in a certain phase of the eclipsed moon can be calculated by
multiplying a given exposure of the full moon by the value in the table below.
Example: If the appropriate exposure of the full moon is 1/60th seconds and you want to
take photos of a 60% waning moon, you can calculate as follows; 1/60 x 8 = 7.5
The appropriate exposure is about 1/8 seconds.
Attaching the Eyepiece Projection Camera Adapter to your Vixen telescope
The eyepiece projection camera adapter can be easily coupled onto the 31.7mm visual back
of the Vixen flip mirror.
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