Review on 🔍 Enhanced Visibility and Precision with Eisco Double Convex Diameter Length by Colin Watkins

This lens is a good tool to make people interested in the physics of light and science in general. Use it to conduct the following strange science experiment: First, go to a place where you can see far (e.g. a long straight street or a large park where the furthest objects you can see , at least a few hundred objects are). Foot). Now turn your attention to the farthest objects, but make sure you can also see objects close to you. (Don't use the lens yet.) Now look in one direction and move to the left. You will notice stationary objects that appear to be moving to your right. It's just the law of parallax. The closer an object is to you, the faster it appears to be moving to the right. The farthest objects barely move relative to you. This is because the light rays from these distant objects are practically parallel when they reach your eyes, so the law of parallax should have little to no effect on them. Then face an object at least ten feet away. Then hold the lens about two inches in front of one eye and close the other eye. Because the distance between your eye and the lens is less than the focal length of the lens, you see the object in the lens right side up. Now, holding the lens still, move your head to the left of the lens and look forward in the same direction. You will see the object to the left of your head moving. Strange, isn't it? Completely violates the law of parallax! But that's ok since it's just a virtual image. Now lower your lens and look at an object about 5 feet away from you. Move towards the object. Its apparent size increases. Then move away from the object. Its visible size becomes smaller. It's just the inverse square law. We instinctively use this law to determine whether we are approaching or moving away from an object. Now consider a distant object that is at least a few hundred meters away. Move towards the object. Its apparent size does not change appreciably. Then move away from the object. Its apparent size does not change appreciably. Since the distance from you to the object is very large, your movement doesn't change that distance very much in percentage terms, so the inverse square law should have little to no effect on it. ten feet. Then bring the lens to one eye and close the other eye. You see the object in the lens right side up. Then hold the lens still and move your head away from the lens. The object appears to be increasing in size, giving the clear impression that the farther you get from it, the closer it gets! Then, while holding the lens steady, tilt your head toward the lens. The object will decrease in apparent size and give the distinct impression that it is getting further and further away from you as you approach it! Strange, isn't it? Completely violates the inverse square law! But that's okay as it's just a virtual image.