These are three images that can be used to compare the Sony 200mm 600mm lens with and without the 1.4 teleconverter. To download the images click on the image and use the save as function to download.
600mm, f/9.0, 1/3200 sec, 1600 ISO. Brightened the frame a small amount
840mm, f/9.0, 1/1600 sec, 1600 ISO with 1.4 teleconverter. As taken from the camera
600mm, f/9.0, 1/3200 sec, 1600 ISO. Cropped to look about the same as the 840mm. Brightened the frame a small amount