diff --git a/toonz/sources/toonzqt/imageutils.cpp b/toonz/sources/toonzqt/imageutils.cpp
index 425c6b0d..d7165e58 100644
--- a/toonz/sources/toonzqt/imageutils.cpp
+++ b/toonz/sources/toonzqt/imageutils.cpp
@@ -764,10 +764,10 @@ void convertOldLevel2Tlv(const TFilePath &source, const TFilePath &dest,
 
 //=============================================================================
 
-#define ZOOMLEVELS 19
+#define ZOOMLEVELS 17
 #define NOZOOMINDEX 6
 double ZoomFactors[ZOOMLEVELS] = {
-    0.015625, 0.03125, 0.0625, 0.125, 0.25, 0.375, 0.5, 0.625, 1, 1.5, 2, 2.5, 3, 3.5, 4, 8, 16, 32, 64};
+    0.015625, 0.03125, 0.0625, 0.125, 0.25, 0.375, 0.5, 0.625, 1, 1.5, 2, 2.5, 4, 8, 16, 32, 64};
 
 double getQuantizedZoomFactor(double zf, bool forward) {
   if (forward && (zf > ZoomFactors[ZOOMLEVELS - 1] ||