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2008~2012
 
ITF 656 bandpass filter, Astronomy Filter

 

656 bandpass filter, Astronomy Filter ITF (induced transmission filter) designed for h-alpha line 656.3 nm blocking for solar observation  

 

OBO provides:

Size: 17.7diax3.226nm(including Ring Lip) Specification 

CWL (nm) : 656nm
Peak T (%) : >60%
Bandwidth : 50nm
Out of band blocking: OD >5 from cut off to 2000nm