. This morning there was about 4/8 cloud, but the wind was gusting up to 40 kn, so there was a mixture of sunshine and cloud. Indoors, of course, the wind does not affect the stability of binoculars.
Normally, I use a 10×25 binocular for projection for my own use. Usually at about 40 cm projection distance.
I wondered if I could increase the projection distance substantially by using a low magnification binocular.
I used the 5×25 Foton and was surprised how good it turned out to be. This is a high resolution binocular, at least the one I used.
I thought I would be able to double the projection distance to get the same size image, but I found that as I was projecting further into the room I was projecting into a much darker part of the room. Normally, when near the window the projection surface is in a bright part of the room, but here it was in a dark part of the room.
I could easily increase the projection distance to 2 m, 2.5 m, and even 3 m and still see a good image, although it was far from me while handholding the 5×25 binocular.
. What this does mean is that a whole group of people, say 10 persons, could view the partially eclipsed Crescent Sun at the same time. Whereas at 40 cm perhaps two people could see it.
I suppose that a six times binocular might also manage something similar.
Normally, I use a 10×25 binocular for projection for my own use. Usually at about 40 cm projection distance.
I wondered if I could increase the projection distance substantially by using a low magnification binocular.
I used the 5×25 Foton and was surprised how good it turned out to be. This is a high resolution binocular, at least the one I used.
I thought I would be able to double the projection distance to get the same size image, but I found that as I was projecting further into the room I was projecting into a much darker part of the room. Normally, when near the window the projection surface is in a bright part of the room, but here it was in a dark part of the room.
I could easily increase the projection distance to 2 m, 2.5 m, and even 3 m and still see a good image, although it was far from me while handholding the 5×25 binocular.
. What this does mean is that a whole group of people, say 10 persons, could view the partially eclipsed Crescent Sun at the same time. Whereas at 40 cm perhaps two people could see it.
I suppose that a six times binocular might also manage something similar.