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IDAS NBZ-II DRE :
The NBZ-II DRE uses specially selected NBZ-II substrates so it can be used for high-speed optical systems:
F1.9 to F4.0 for optical systems with central obstruction
F1.4 to F3.3 for high speed refractors and camera lens
Size
Suffix
Description
Availability
DRE

for Canon EF-EOSR drop-in mount adapter & Meike MK-EFTR-C (EF-R) & MK-EFTE-C (EF-E) drop-in mount adapters. Download DRE Installation Manual at: DRE Installation Manual

Now the IDAS DRE series have been replaced by the DRT series.

discontinued

 

 

The transmittance curves of the IDAS NBZ-II DRE differes from those of the fundamental NBZ-II susbstrate. Any other specifications remain the same as of the fundamental NBZ-II substrate.


Simulations: