R.E.L. Binoculars

[lawrence_n]

On to my last question. Do you know what "D G Y O" stands for? Dark, Green, Yellow, Orange perhaps? Never having used optics with different coloured filters, I have no first hand knowledge as to their efficacy, but on an intellectual level, I could see the practical applications.

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[Flying10uk]

Orange

I would suggest "Ordinary" or the normal position without any filtration because at least one position of the knob must be where there is no colour filtration.

[Surpmil]

On to my last question. Do you know what "D G Y O" stands for? Dark, Green, Yellow, Orange perhaps? Never having used optics with different coloured filters, I have no first hand knowledge as to their efficacy, but on an intellectual level, I could see the practical applications.

Just dug my pair out and it's dark here now, but looking at the ceiling lights, "Dark/Day, Green/Grey (can't tell now!), definitely Yellow and Flying10Uk is probably right about the "O" being "Ordinary" or something similar. That last setting is the closest to clear.

Some photos off an old drive, and my pair.