Update README.md

Author: Otkupman

README.md

@@ -1,2 +1,5 @@
-# OD-Lens
- Optical Mini Calculator 
+# OD-Lens (Lite)
+Simple calculation of the basic optical parameters of a lens. It provides an intuitive graphical interface for optical engineers, photographers, and students to explore the relationships between focal length, field of view, sensor size, and aperture.
+The user selects which parameter they want to calculate, and the program automatically computes it using the provided values. Parameters are recalculated instantly as you type, providing immediate feedback.
+
+![Screenshot](https://github.com/Otkupman/OD-Lens/blob/main/OD-Lens%20(Lite).png)