diff --git a/exif_rad.py b/exif_rad.py
index be13619..091417f 100755
--- a/exif_rad.py
+++ b/exif_rad.py
@@ -22,6 +22,7 @@ import piexif.helper
 # 600  series: 0.0065   µSv/h / CPM
 # 600+ series: 0.002637 µSv/h / CPM
 
+# Configure argument parser for cli options
 parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter, 
                                  description='''A tool that writes 
     radiation levels (and optionally geocoordinates) to image files 
@@ -44,27 +45,31 @@ with open(args.csv, "r") as f:
     for photo in args.photos:
         # Load Image and EXIF data
         im = Image.open(photo)
-        exif_dict = piexif.load(im.info["exif"])
+        exif_dict = piexif.load(im.info['exif'])
+        photo_basename = os.path.basename(photo)
 
-        picrawtime = exif_dict["Exif"][piexif.ExifIFD.DateTimeOriginal].decode('ASCII')
+        picrawtime = exif_dict['Exif'][piexif.ExifIFD.DateTimeOriginal].decode('ASCII')
         picisotime = datetime.strptime(picrawtime, "%Y:%m:%d %H:%M:%S")
-
-        print("Timestamp of image: ", picisotime)
+        print('\nProcessing file:', photo_basename)
+        print('Timestamp of image:', picisotime)
         for _, csvrawtime, csvrawcpm, _ in csvreader:
             csvisotime = datetime.fromisoformat(csvrawtime)
             
             if csvisotime == picisotime:
                 rad = round(float(csvrawcpm) * args.sifactor, 2)
-                print("Radiation at time of photo: ", rad, "µS/h")
+                print('Found matching timestamp!')
+                print('Radiation at time of photo:', rad, 'µS/h')
 
                 # convert str to exif compatible string
-                new_comment = "Radiation ☢ " + str(rad) + " µS/h"
+                new_comment = 'Radiation ☢ ' + str(rad) + ' µS/h'
                 user_comment = piexif.helper.UserComment.dump(new_comment, encoding="unicode")
                 exif_dict["Exif"][piexif.ExifIFD.UserComment] = user_comment
                 
                 # compile and write tags
-                print("Going to write comment: " + new_comment)
+                print('Going to write comment:', new_comment)
                 exif_bytes = piexif.dump(exif_dict)
-                outfile = os.path.join(args.outdir, photo)
+                outfile = os.path.join(args.outdir, photo_basename)
                 im.save(outfile, exif=exif_bytes)
                 break
+        else:
+            print('Found NO matching timestamp, Not going to modify photo.')