diff --git a/mirva/__init__.py b/mirva/__init__.py
index 617c9f3..f95b5a7 100644
--- a/mirva/__init__.py
+++ b/mirva/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "20210821.0"
+__version__ = "20210826.0"
 
 
 def get_version():
diff --git a/mirva/mirva.py b/mirva/mirva.py
index 1401c4f..24a85c7 100755
--- a/mirva/mirva.py
+++ b/mirva/mirva.py
@@ -16,6 +16,7 @@ class Mirva:
         )
         self.resource_dir = ".mirva"
         self.config_file = os.path.join(self.resource_dir, "config.cfg")
+        self.config_backup = os.path.join(self.resource_dir, "config.cfg.bkp")
         self.get_options()
         os.chdir(self.options.folder)
         self.write_resources()
@@ -24,8 +25,9 @@ class Mirva:
             self.create_config()
             print("Config created: Exiting without gallery creation. Check config first.")
             return
-        self.create_config()
         self.get_config()
+        if self.options.exif:
+            self.append_exif()
         self.create_posts()
         self.write_index()
         self.write_mediums()
@@ -33,11 +35,11 @@ class Mirva:
 
     def create_config(self):
 
-        config = configparser.ConfigParser()
-        config.read(self.config_file)
+        self.config = configparser.ConfigParser()
+        self.config.read(self.config_file)
         config_changed = False
-        if not "SITE" in config:
-            config["SITE"] = {
+        if not "SITE" in self.config:
+            self.config["SITE"] = {
                 "title": "",
                 "sub_title": "",
                 "intro": "",
@@ -46,20 +48,14 @@ class Mirva:
             config_changed = True
 
         for f in self.file_list:
-            if not f in config:
+            if not f in self.config:
                 title, _ = os.path.splitext(f)
                 title = title.replace("_", " ")
-                config[f] = {"title": title, "description": ""}
+                self.config[f] = {"title": title, "description": ""}
                 config_changed = True
 
         if config_changed:
-            print(
-                "Modified config: {}".format(
-                    os.path.join(self.options.folder, self.config_file)
-                )
-            )
-            with open(self.config_file, "wt") as fp:
-                config.write(fp)
+            self.write_config()
 
     def create_posts(self):
 
@@ -75,6 +71,21 @@ class Mirva:
         self.config = configparser.ConfigParser()
         self.config.read(self.config_file)
 
+    def write_config(self):
+        print(
+            "Modified config: {}".format(
+                os.path.join(self.options.folder, self.config_file)
+            )
+        )
+        if os.path.exists(self.config_file):
+            with open(self.config_file, "rt") as reader:
+                with open(self.config_backup, "wt") as writer:
+                    writer.write(reader.read())
+
+        with open(self.config_file, "wt") as fp:
+            self.config.write(fp)
+
+
     def get_files(self):
         image_match = re.compile(".*\.jpg$|.*\.jpeg$|.*\.png$|.*\.gif$|.*\.tif$", re.I)
         files = []
@@ -95,7 +106,7 @@ class Mirva:
         )
         # parser.add_argument("-v", default=False, action="store_true")
         parser.add_argument(
-            "--config", default=False, action="store_true", help="Write config and exit"
+            "--config", default=False, action="store_true", help="Write config and exit. Required if more images are added."
         )
         parser.add_argument(
             "--force",
@@ -103,6 +114,12 @@ class Mirva:
             action="store_true",
             help="Force regeneration of middle sized images",
         )
+        parser.add_argument(
+            "--exif",
+            default=False,
+            action="store_true",
+            help="Append EXIF information to image descriptions",
+        )
         parser.add_argument(
             "--version",
             action="version",
@@ -317,4 +334,50 @@ function create_button(direction, to) {{
                 ]
                 sys.stdout.write(".")
                 sys.stdout.flush()
-                subprocess.call(convargs)
+                subprocess.run(convargs)
+        sys.stdout.write("\n")
+
+    def append_exif(self):
+        exif_format = '''
+        <ul>
+          <li>Date: %[EXIF:DateTimeOriginal]
+          <li>Exposure: %[EXIF:ExposureTime]s
+          <li>Fnumber: F%[EXIF:FNumber]
+          <li>Pixels: %w x %h
+          <li>Size: {size}
+        </ul>
+        '''
+
+        for f in self.config:
+            if f in self.file_list:
+                sys.stdout.write(".")
+                sys.stdout.flush()
+                file_size = human_size(f)
+                p = subprocess.run(
+                    ['identify','-format',exif_format.format(size=file_size),"{}[0]".format(f)],
+                    capture_output = True
+                )
+
+                self.config[f]['description'] += p.stdout.decode('utf-8')
+        sys.stdout.write("\n")
+        self.write_config()
+
+
+
+def human_size(file_name, precision=1):
+    size = os.path.getsize(file_name)
+
+    if size == None:
+        return "nan"
+    sign = ""
+    if size < 0:
+        sign = "-"
+        size = -size
+    suffixes = ["B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB"]
+    suffixIndex = 0
+    defPrecision = 0
+    while size > 1024:
+        suffixIndex += 1
+        size = size / 1024.0
+        defPrecision = precision
+    return "%s%.*f%s" % (sign, defPrecision, size, suffixes[suffixIndex])