Moon Halo

Moon Halo

On April 13 the sky was generally clear. About 11 p.m. however, some high cloud passed over the Moon and a spectacular halo was created. It was enough time to gather the camera, lens and a tripod. The round rainbow is not a lens artifact - at 200mm the lens does not show it, but a very similar halo in appearance it gives at 115mm. Increasing the focal length causes the artificial halo to broaden and go away from the picture frame.
Photo Technical Data
Size of the original: 3304 x 2704 pixels
Composite of 2 photos; background:
f 2.8, exposure 1 s, ISO 1250
Canon 1Ds with a 200 mm lens (70-200 L IS)
Moon: f 10, exposure 1/180 s, ISO 50, Canon 1Ds with a 1250 mm lens; image reduced to its natural 200 mm F.L. lens size.