Perplexing RefractorPosted By Tom Rodstrom |
The lens is from am opaque projector. It is designed to project a picture of a brightly lit object inside the machine onto a wall 10 to 20 feet away. It is not designed to focus at infinity and performs poorly as a telescope. I doubt that it can handle anything over 15X at all and that would be a 25mm eyepiece.
Opaque projector lenses come in different focal lengths. I think that 15 inches is the most common. The 18 inch lens may be better than I've seen with the 15 inch versions.
Good Luck
Tom
Opaque projector lenses come in different focal lengths. I think that 15 inches is the most common. The 18 inch lens may be better than I've seen with the 15 inch versions.
Good Luck
Tom