diff --git a/src/ev_calculator.py b/src/ev_calculator.py
index 2c79627..7129966 100644
--- a/src/ev_calculator.py
+++ b/src/ev_calculator.py
@@ -21,16 +21,16 @@ class EVCalculator:
     DEFAULT_ISO_SPEED = 100
 
     APERTURE_VALUES = {
-        1/32: "1/32",
-        1/22: "1/22",
-        1/16: "1/16",
-        1/11: "1/11",
-        1/8: "1/8",
-        1/5.6: "1/5.6",
-        1/4: "1/4",
-        1/2.8: "1/2.8",
-        1/2: "1/2",
-        1/1.4: "1/1.4"
+        1/32: "f/ 32",
+        1/22: "f/ 22",
+        1/16: "f/ 16",
+        1/11: "f/ 11",
+        1/8: "f/ 8",
+        1/5.6: "f/ 5.6",
+        1/4: "f/ 4",
+        1/2.8: "f/ 2.8",
+        1/2: "f/ 2",
+        1/1.4: "f/ 1.4"
     }
 
     SHUTTER_SPEED_VALUES = {
@@ -46,12 +46,12 @@ class EVCalculator:
         1/8: "1/8",
         1/4: "1/4",
         1/2: "1/2",
-        1: "1",
-        2: "2",
-        4: "4",
-        8: "8",
-        15: "15",
-        30: "30"
+        1: "1 sec",
+        2: "2 sec",
+        4: "4 sec",
+        8: "8 sec",
+        15: "15 sec",
+        30: "30 sec"
     }
 
     def luxToEV(lux: float) -> float: