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IDASmio　OIII6.0:
a 2.5mm thk mono band filter for enchanced OIII nebula observations
band width FWHM 6.0nm +/- 0.2nm.
The combined transimittance rate of IDAS OIII6.0 at 495.9nm and 500.7nm:
more than 80% with F2-infinite optical systems
more than 75% with F1.9-infinite systems

　　　　　
Suffix
Brand
 Description
Availability

DR25
IDASmio

for use with EF EOS R Drop-in Mount Adapters: substrate thk. = 2.5mm

Feb. , 2022

 

For those reflection type optical systems that have a relatively large CO such as seondary mirror, please rerer to the " Transmittance Curves for Optical Systems with CO" as shown below:
If you plan to use the IDAS OIII6.0 with a telephoto- or retrofocus type lens, please consult with us before puchasing.

Transmittance Curves for Optical Systems without CO
Transmittance Curves for Optical Systems with CO