diff --git a/imageringlist.cpp b/imageringlist.cpp
index fef1a6f..0361e08 100644
--- a/imageringlist.cpp
+++ b/imageringlist.cpp
@@ -86,7 +86,7 @@ bool ImageRingList::setDir(const QString path, const QString &currentFile)
     if(dir.exists())
     {
         QStringList nameFilter;
-        nameFilter << "*.jpg" << "*.png" << "*.cr2" << "*.fit";
+        nameFilter << "*.jpg" << "*.png" << "*.cr2" << "*.fit" << "*.fits";
 
         QStringList list = dir.entryList(nameFilter, QDir::Files | QDir::Readable, m_liveMode ? QDir::Time : QDir::Name);
         QStringList absolutePaths;
diff --git a/loadrunable.cpp b/loadrunable.cpp
index ead891a..6e32bb7 100644
--- a/loadrunable.cpp
+++ b/loadrunable.cpp
@@ -268,7 +268,7 @@ void LoadRunable::run()
         raw = true;
         qDebug() << "LoadRaw" << timer.elapsed();
     }
-    else if(m_file.endsWith(".FIT", Qt::CaseInsensitive))
+    else if(m_file.endsWith(".FIT", Qt::CaseInsensitive) || m_file.endsWith(".FITS", Qt::CaseInsensitive))
     {
         loadFITS(m_file, info, m_analyzeLevel != None ? &rawImage : nullptr, &img);
     }
diff --git a/mainwindow.cpp b/mainwindow.cpp
index d3f0f0e..43bdf01 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -204,7 +204,7 @@ void MainWindow::openFile()
     if(standardLocations.size())
         path = standardLocations.first();
 
-    QString file = QFileDialog::getOpenFileName(this, tr("Open file"), path, tr("Images (*.jpg *.png *.cr2 *.fit *.JPG *.PNG *.CR2 *.FIT)"));
+    QString file = QFileDialog::getOpenFileName(this, tr("Open file"), path, tr("Images (*.jpg *.png *.cr2 *.fit *.fits *.JPG *.PNG *.CR2 *.FIT *.FITS)"));
     if(!file.isEmpty())
     {
         QFileInfo info(file);