[INRAD] TT ORION II

[Jim Denneny]

I recently acquired an Orion II with TT optional roofing filters installed:
2.4, 1.8, 500, & 250.  Can anyone describe what selectivity enhancements I
might expect changing out to Inrad filters:  i.e. 752, 762, 761?  I note
there is no Inrad 250 filter for Orion.

 

Tnx

 

Jim Denneny

K7EG

 

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