diff --git a/camlibs/ptp2/ptp.c b/camlibs/ptp2/ptp.c
index 523875f11..8652d72b8 100644
--- a/camlibs/ptp2/ptp.c
+++ b/camlibs/ptp2/ptp.c
@@ -4509,7 +4509,11 @@ ptp_sony_get_vendorpropcodes (PTPParams* params, uint16_t **props, unsigned int
 
 	*props = NULL;
 	*size = 0;
-	PTP_CNT_INIT(ptp, PTP_OC_SONY_GetSDIOGetExtDeviceInfo, 0xc8 /* unclear */);
+	if(has_sony_mode_300(params)) {
+		PTP_CNT_INIT(ptp, PTP_OC_SONY_GetSDIOGetExtDeviceInfo, 0x12c /* newer mode (300) */);
+	} else {
+		PTP_CNT_INIT(ptp, PTP_OC_SONY_GetSDIOGetExtDeviceInfo, 0x0c8 /* older mode (200) */);
+	}
 	CHECK_PTP_RC(ptp_transaction(params, &ptp, PTP_DP_GETDATA, 0, &xdata, &xsize));
 	if (xsize == 0) {
 		ptp_debug (params, "No special operations sent?");
diff --git a/camlibs/ptp2/ptp.h b/camlibs/ptp2/ptp.h
index 38499112d..5c650599a 100644
--- a/camlibs/ptp2/ptp.h
+++ b/camlibs/ptp2/ptp.h
@@ -24,6 +24,7 @@
 #define CAMLIBS_PTP2_PTP_H
 
 #include <stdarg.h>
+#include <string.h>
 #include <time.h>
 #include <sys/time.h>
 #if defined(HAVE_ICONV) && defined(HAVE_LANGINFO_H)
@@ -4678,6 +4679,24 @@ uint16_t ptp_olympus_getcameraid (PTPParams*, unsigned char**, unsigned int *);
 uint16_t ptp_olympus_omd_capture (PTPParams* params);
 uint16_t ptp_olympus_omd_move_focus (PTPParams* params, uint32_t direction, uint32_t step_size);
 
+/* Internal function for SONY */
+static inline int
+has_sony_mode_300(PTPParams *params) {
+	if (params->deviceinfo.VendorExtensionID != PTP_VENDOR_SONY) return 0;
+	if (!strcmp(params->deviceinfo.Model, "ILCE-7SM3")) return 1;
+	if (!strcmp(params->deviceinfo.Model, "ILCE-7RM4")) return 1;
+	if (!strcmp(params->deviceinfo.Model, "ILCE-7RM4A")) return 1;
+	if (!strcmp(params->deviceinfo.Model, "ILCE-7C")) return 1;
+	if (!strcmp(params->deviceinfo.Model, "ILCE-9M2")) return 1;
+	if (!strcmp(params->deviceinfo.Model, "ILCE-1")) return 1;
+	if (!strcmp(params->deviceinfo.Model, "ILCE-7M4")) return 1;
+	if (!strcmp(params->deviceinfo.Model, "ILCE-7RM5")) return 1;
+	if (!strcmp(params->deviceinfo.Model, "ZV-E1")) return 1;
+	// TODO add other mode 300 camera models
+	return 0;
+}
+
+
 /* Non PTP protocol functions */
 static inline int
 ptp_operation_issupported(PTPParams* params, uint16_t operation)