Enter the object distance (in) and the focal length (in) into the Image Distance Calculator. The calculator will evaluate and display the Image Distance.
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Image Distance Formula
The following formula is used to calculate the Image Distance.
1/Di = 1/F – 1/O
- Where Di is the Image Distance (in)
- F is the object distance (in)
- O is the focal length (in)
How to Calculate Image Distance?
The following example problems outline how to calculate Image Distance.
Example Problem #1:
- First, determine the object distance (in).
- The object distance (in) is given as: 4.
- Next, determine the focal length (in).
- The focal length (in) is provided as: 2.
- Finally, calculate the Image Distance using the equation above:
1/Di = 1/F – 1/O
The values given above are inserted into the equation below and the solution is calculated:
1/Di = 1/2 – 1/4 = 4 (in)
Example Problem #2:
For this problem, the variables needed are provided below:
object distance (in) = 6
focal length (in) = 2
This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer.
1/Di = 1/F – 1/O = ?
