The following pictures are examples of the effects one can get from using the EF 25 tube attached to a wide-angle zoom lens or an EF 50mm f/1.4 USM standard lens. You can click any of the thumbnail photos to view a larger version. SHOT USING THE EF 28-70mm f/2.8L USM at its 70mm setting: << Back to Main . 1 . 2 . 3 . 4 .