Custom 4" Coma Correctors for the Dream Astrograph line and other select customers.



The above diagram shows the chromatic performance of the 4" custom coma corrector from 400nm to 700nm (top row) and from on-axis (0.00mm) to off-axis (26.0mm). The corrector shows the largest stars at 400nm, but this occurs mainly at the extreme off-axis location (26mm). Since our atmosphere absorbs most UV rays and CCD chips are often very low in QE at 400nm, this is of little concern. The white square boxes are 25 microns on a side, so this again is completely acceptable because we are well within the 25 micron area.


 

 
 


pricing, availability and specifications subject to change without notice