Double reticles

[PeterB]

There's at least one photo (shown on the Aulis site) which shows double reticles. Unfortunately I don't have the photo's number.

The photo is of the lunar module, with the Sun behind the LM. The reticle nearest the Sun is doubled, with the darker reticle giving the appearance of being recorded at a slight angle to the fainter.

The best analogy I can think of is to imagine the cross being drawn on a piece of translucent paper and a more solid page behind, then the translucent page being partly turned.

I presume the effect is something to do with the Sun being close to the reticle, but I'd appreciate someone explaining it in a bit more detail.

Cheers

[PeterB]

I suspect the photo may be AS14 -66-9306.

[PhantomWolf]

If it is the one that I think it is, then Jay explained it a little bit back.

What he determined is that the bright light of the sun has caused the reticles to be reflected onto the back of the lens in the camera, the reason that they are curved. This reflection then has been captured in the image giving the double reticle.

[JayUtah]

Yes, although to be fair it was Craig Lamson's theory, which I later confirmed with analytical geometry.

[PeterB]

Okay, thanks for that.