With this minor patch (stolen from 2.5.50) the Logitech Quickcam Zoom works
fine under linux 2.4.20.
 -- Guido

--- linux-2.4.20.old/drivers/usb/pwc-if.c	Fri Nov 29 00:53:14 2002
+++ linux-2.4.20/drivers/usb/pwc-if.c	Wed Dec  4 15:53:08 2002
@@ -77,6 +77,7 @@
 	{ USB_DEVICE(0x0471, 0x0312) },
 	{ USB_DEVICE(0x069A, 0x0001) }, /* Askey */
 	{ USB_DEVICE(0x046D, 0x08b0) }, /* Logitech */
+	{ USB_DEVICE(0x046D, 0x08b3) }, /* Logitech QuickCam Zoom */
 	{ USB_DEVICE(0x055D, 0x9000) }, /* Samsung */
 	{ USB_DEVICE(0x055D, 0x9001) },
 	{ USB_DEVICE(0x041E, 0x400C) }, /* Creative */
@@ -1695,6 +1696,11 @@
 			name = "Logitech QuickCam 3000 Pro";
 			type_id = 730;
         		break;
+		case 0x08b3:
+                        Info("Logitech QuickCam Zoom USB webcam detected.\n");
+                        name = "Logitech QuickCam Zoom";
+                        type_id = 740; /* ?? unknown sensor */
+                        break;
         	default:
         		return NULL;
         		break;