Question

After watching the video, the presented started focusing with the 4x objective and was able to show all three threads in focus at the same time. How would you describe the depth of focus for this objective? (type shallow or deep in the blank)  .

When the presented increased the magnification, what happened to the field of view? (type increased or decreased in the blank)  .

At this higher magnification, what happened to the depth of focus? (type increased or decreased in the blank)  .

Based on this concept, would you use the 4x or 40x to determine the order of the threads (i.e. which thread was on top, which one was in the middle and which one was on the bottom)?

Answer 1

1. deep depth of field.

A deep depth of field captures a larger area in focus, keeping everything in the image sharp and clear.  A shallow depth of field refers to a small area in focus. the subject is in focus, while the background is blurred.

2. decrease

increase in magnification will decrease the deapth of field.

3. increase

increase in magnification will increase the deapth of focus

4. for finding which thread was on the bottom, middle and top , we need to see all threads in screen so we need high deapth of field . So, a 4x magnification is enough.