Fw-190 Bar.. once and for all...

[GF_Mastiff]

it's exactly like a sniper scope with the red dot in the middle, if you have ever used one. I have and that's what the red dot does, when I look in to the scope from a distance it looks larger than it really is. The lense in the scope causes it to look as if it is getting larger when it really isnt.

[IvanK]

Yep I am a rifle shooter as well The principals are totally different. In a rifle scope the image of the sighting reference be it a dot or cross hair is magnified, therefore there is an associated focal length. In these sights the aiming refrence and your eye are seperated by a lens. Therfore any time you change the distance between your eye and the scope the amount of magnification changes as does the aiming refrence (dot or cross hair) size.

With a reflector sight there is no magnification whatsoever on the displayed reticle. There is no lens between your eye and the projected reticle. The reticle is displayed at infinity. I have used slightly more advanced gyro reflector sights in real life ... Ferranti Isis and CSF97K and HUDs,though more modern than the Revis the basic principals are the same. The symbology size does not change as you move your eyes closer or further from the combining glass. If it did than any form of angular range finding (stadimetric) would not be possible.

[Bobb4]

Originally Posted by IvanK

Yep I am a rifle shooter as well
With a reflector sight there is no magnification whatsoever on the displayed reticle. There is no lens between your eye and the projected reticle. The reticle is displayed at infinity. I have used slightly more advanced gyro reflector sights in real life ... Ferranti Isis and CSF97K and HUDs,though more modern than the Revis the basic principals are the same. The symbology size does not change as you move your eyes closer or further from the combining glass. If it did than any form of angular range finding (stadimetric) would not be possible.

I see from the photo's that the sight was inline with the right eye. I am assuming US and British planes had it centrally placed. Would this have made much difference?
And if it did, one hopes SOW models this...

[heloguy]

The illusion that the sight is changing size is due to the fact that as you move toward, or away from the sight, you're also moving toward or away from the reflector glass, and the wall behind it.

You're actually having more or less surface area of the glass, and wall in your field of view at any given time. The sight stays the same size, the wall and glass change size due to retinal image size projected in the eye.

[IvanK]

That makes sense Heloguy