[APML] Question about SCT and Giant Eazy Guider

[Wei-Hao Wang <wang@IfA.Hawaii.Edu>]

Aloha,

I have a question for people who use SCT and Lumicon Giant 
Eazy Guider.  

I heard that the illuminated areas of SCTs are limited by 
its baffle in front of the primary and is not much larger 
than the 35mm camera frame.  Is this true?  If yes, what's 
the advantage of using a large off-axis guider such as the 
one made by Lumicon?  The field of view is small anyway,
right?  In addition, if the illuminated area is small, how
can the prism of such large off-axis guider access the star
light?  (I assume that the prism locates near the edge of
the giant eazy guider.)  

Thanks for answering.

Wei-Hao


______________________________________________________________________
Wei-Hao Wang  :)

Institute for Astronomy at University of Hawaii

Address:                       Phone: 808-956-9867                  
2680 Woodlawn Drive            Personal Website:
Honolulu, HI 96822             http://www.ifa.hawaii.edu/~wang
______________________________________________________________________



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