Using the Canon EOS-3 in Aperture-priority AE and Shutter-priority AE modes with 21-zone Evaluative metering. In the last issue, I showed how to use the Canon EOS-3 in its Intelligent Program AE mode in conjunction with the 21-zone Evaluative metering. Now I will describe how to use the camera in both its Aperture-priority (Av) and Shutter-priority (Tv) AE modes, also with the Evaluative metering. Focusing point selection with all the photos shown in this issue was accomplished with the camera's Eye Controlled Focus (ECF), in both One Shot AF and AI Servo AF modes. Automatic or manual point selection? Doesn't need to use them at all with the EOS-3. I donít own any EOS-3 camera but I do have access to one should the need arises, like showing the owners how to use one in articles like this. The Aperture-priority (Av) AE mode, as its name suggests and a fact that many EOS users and other photo enthusiasts already know, allows the photographer to select the best f-stop for a given situation while the camera automatically chooses the appropriate shutter speed. If the user wants a greater zone of sharpness, he/she will select an aperture with a smaller f-stop, like f/8, f/11 or f/16. And, for a shallow zone of focus, the setting will be the reversed, a bigger f-stop number like f/2.8, f/2.0 or f/1.4, depending on the maximum aperture of the lenses used. In issue No 5, most EOS users have read about "Aperture and Depth-of-Field" and in issue No 27, of how to use the Av mode to create better pictures with their EOS cameras. In this issue, most of the techniques described are similar to what was featured in issue No 27, only this time around; the camera used is the EOS-3, rather than the overall how-to tips using any EOS model. Indoor group photo of beauty queens (70mm) Another group shot (100mm)     Selective focus depth zone (135mm) Close-up shot (200mm) For the indoor group photo (above), the metering value was obtained by zooming the lens to its 200mm focal length, memorizing it, resetting to 70mm, recomposing and shooting. An aperture of f/2.8 was selected and the camera set a shutter speed of 1/80 sec. Since the beauty queens were standing in more or less at the same plane of focus, the zone of sharpness was adequate to cover all six of them. For the outdoor group photo, it was shot at f/8 to extend the depth-of-field and covered all the eight finalists. Next, the EF 70-200mm f/2.8L USM lens was zoomed to its 135mm focal length and the three finalists were shot at f/4. For the final photo, shot at the 200mm focal length, the f/5.6 was selected to ensure the sharpness would cover both finalists, although at the maximum setting, I was not able to exclude the distracting head of the partly-hidden contestant on the left. << Back to Main . 1 . 2 . 3 . 4 . 5 . 6 .