This is a complex topic. Ideally one should look thru the bino at noon (6400K) , cloudy clear day (10K K), sunset and after sunset. or use transmission spectra to compute the results of pushing the above illuminants through the bino.
If a bino gets rgb but chops r and b that presumably leaves g in the middle. The difference might be most visible when what is chopped is a significant part of the adopted white, which I would expect would occur under cloudy conditions or after sunup/ before sundown.
A visual test against a light reflective background might work well because the eye tends to be most sensitive detecting light tints.
Edmund
If a bino gets rgb but chops r and b that presumably leaves g in the middle. The difference might be most visible when what is chopped is a significant part of the adopted white, which I would expect would occur under cloudy conditions or after sunup/ before sundown.
A visual test against a light reflective background might work well because the eye tends to be most sensitive detecting light tints.
Edmund
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