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ich habe gestern mich mit dem Spot-AF an der Mark IV beschäftigt, dieser ist über die C.Fn III-6-7 zu setzen ist und damit nur mit den Canon SuperTele's verfügbar. Ich habe den Spot-Af bereits schätzen gelernt.
Hat da jemand einen Trick zur alternativ Aktivierung ohne AF Stop Taste?
Ich habe bei den langen Brennweiten normalerweise AI-Servo<=>One Shot auf der AF Stop Taste, sicher wird das aber auch Fotografen interessieren die keine AF-Stop Taste am Objektiv haben die z.B mit langen Sigma Objektiven arbeiten.
Quelle: http://www.usa.canon.com/dlc/control...articleID=3107
Hat da jemand einen Trick zur alternativ Aktivierung ohne AF Stop Taste?
Ich habe bei den langen Brennweiten normalerweise AI-Servo<=>One Shot auf der AF Stop Taste, sicher wird das aber auch Fotografen interessieren die keine AF-Stop Taste am Objektiv haben die z.B mit langen Sigma Objektiven arbeiten.
Spot AF
The new AF system allows for considerable customization, particularly because new controls have been added to the complement of Custom Functions. For example, when C.Fn III-6-7 is set and you press the AF Stop button on a super telephoto lens that has AF Stop buttons, the focusing line sensor's usable area becomes narrower; The new Spot AF feature works with certain lenses to reduce the focusing sensor's field of view for greater precision.
the focusing field of view is reduced by about half. The AF system can then focus on a smaller area, reducing detection errors caused, for example, when a sensor sees a bit of extraneous background. The following lenses have this feature:
Spot AF works regardless of the AF mode and AF point selection method. It is especially effective for manual AF point selection. However, since the decrease in size may make it difficult to keep the AF point centered on a moving subject, focusing might be difficult. When starting with a scene entirely out of focus, Spot AF focusing may be slow. As a reminder that Spot AF has been set, the AF point display in the viewfinder will flash brighter than normal.
The new AF system allows for considerable customization, particularly because new controls have been added to the complement of Custom Functions. For example, when C.Fn III-6-7 is set and you press the AF Stop button on a super telephoto lens that has AF Stop buttons, the focusing line sensor's usable area becomes narrower; The new Spot AF feature works with certain lenses to reduce the focusing sensor's field of view for greater precision.
the focusing field of view is reduced by about half. The AF system can then focus on a smaller area, reducing detection errors caused, for example, when a sensor sees a bit of extraneous background. The following lenses have this feature:
- EF 200mm f/2L IS USM
- EF 300mm f/2.8L IS USM
- EF 400mm f/2.8L IS USM
- EF 400mm f/4 DO IS USM
- EF 500mm f/4L IS USM
- EF 600mm f/4L IS USM
- EF 800mm f/5.6L IS USM
Spot AF works regardless of the AF mode and AF point selection method. It is especially effective for manual AF point selection. However, since the decrease in size may make it difficult to keep the AF point centered on a moving subject, focusing might be difficult. When starting with a scene entirely out of focus, Spot AF focusing may be slow. As a reminder that Spot AF has been set, the AF point display in the viewfinder will flash brighter than normal.
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