Final answer:
To photograph an eyeball, using a 'tight lens' or shorter focal length lens may not be ideal. A macro lens with a focal length between 90mm to 200mm is generally recommended for macro photography of the eye, to balance magnification and working distance. The claim of a microscope achieving 250,000x magnification is unrealistic with a 0.500 cm objective and a 5.00 cm eyepiece.
Step-by-step explanation:
When considering whether to use a tight lens for an eyeball picture, one must understand the relationship between focal length and magnification as it applies to photography and optical instruments. A microscope, for instance, achieves high magnification through a combination of an objective with a short focal length and an eyepiece with a longer focal length. In the case of a given microscope with an objective focal length of 0.500 cm and an eyepiece focal length of 5.00 cm, claiming an overall magnification of 250,000 is not typical or realistic for standard microscopes. Normal microscope magnifications range from 40x to 1000x, typically.
For a detailed eyeball photograph with a camera, a lens with a longer focal length, which is not considered 'tight,' could be more beneficial. This is because it would allow a greater working distance and could potentially provide better detail and sharpness without being too close to the subject, which could cause discomfort or harm to the eye. Especially for macro photography, a macro lens with a focal length between 90mm to 200mm is preferred as it provides sufficient magnification while maintaining a comfortable distance from the subject.
The magnification of a microscope or telescope is influenced by factors such as the quality of the lens and the focal lengths involved. To capture clear and detailed images of the eye, both the correct choice of lens and an understanding of the principles of optics, as they apply to the eye, are essential. This involves the accommodation of the eye for distant and near vision, as the lens must become more converging for closer objects.