Adjusting Camera Lens for Sharp Image: 72.0mm Focal Length at 1.90m Distance

[IVIiChAeL]

Figure 36.36 diagrams a cross-section of a camera. It has a single lens of focal length 72.0 mm, which is to form an image on the film at the back of the camera. Suppose the position of the lens has been adjusted to focus the image of a distant object. How far and in what direction must the lens be moved to form a sharp image of an object that is 1.90 m away

 

[mgb_phys]

The rule you need is.
1/focal_length = 1/object_distance + 1\image_distance

 

[Moetasim]

To form a sharp image of an object that is 1.90 m away, the lens must be moved closer to the film, towards the object. This is because the lens needs to be adjusted to focus at a shorter distance in order to capture a sharp image of a closer object. Additionally, the lens may need to be adjusted slightly in either direction to fine-tune the focus and ensure maximum sharpness. It is important to note that the specific distance and direction of adjustment may vary depending on the specific camera and lens being used.