diff --git a/Graphics/HsExif.hs b/Graphics/HsExif.hs
--- a/Graphics/HsExif.hs
+++ b/Graphics/HsExif.hs
@@ -188,9 +188,10 @@
     firstBytes <- lookAhead $ (,) <$> getWord16be <*> getWord16be
     case firstBytes of
         (0xffd8,_ ) -> getWord16be >> findAndParseExifBlockJPEG
-        (0x4d4d,42) -> findAndParseExifBlockNEF
+        (0x4d4d,42) -> findAndParseExifBlockNEF      -- DNG, Nikon
         (0x4949,42) -> findAndParseExifBlockNEF
-        _           -> fail "Not a JPEG or NEF file"
+        (0x4949,0x2A00) -> findAndParseExifBlockNEF  -- TIFF, Canon CR2, Sony ARW
+        _           -> fail "Not a JPEG, TIFF, or TIFF-based raw file"
 
 findAndParseExifBlockJPEG :: Get (Map ExifTag ExifValue)
 findAndParseExifBlockJPEG = do
diff --git a/hsexif.cabal b/hsexif.cabal
--- a/hsexif.cabal
+++ b/hsexif.cabal
@@ -1,5 +1,5 @@
 name:                hsexif
-version:             0.6.1.2
+version:             0.6.1.3
 synopsis:            EXIF handling library in pure Haskell
 description:         The hsexif library provides functions for working with EXIF data
                      contained in JPEG files. Currently it only supports reading the data.
diff --git a/tests/Tests.hs b/tests/Tests.hs
--- a/tests/Tests.hs
+++ b/tests/Tests.hs
@@ -53,7 +53,7 @@
 
 testNotAJpeg :: B.ByteString -> Spec
 testNotAJpeg imageContents = it "returns empty list if not a JPEG" $
-    assertEqual' (Left "Not a JPEG or NEF file") (parseExif imageContents)
+    assertEqual' (Left "Not a JPEG, TIFF, or TIFF-based raw file") (parseExif imageContents)
 
 testNoExif :: B.ByteString -> Spec
 testNoExif imageContents = it "returns empty list if no EXIF" $