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Nikon DSLR Cameras
D7100
D7100 Issues with Aperture Priority Mode
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<blockquote data-quote="gustafson" data-source="post: 543410" data-attributes="member: 40735"><p>Went and read up on auto ISO, and while it helped, I still have some confusion about how it works.</p><p></p><p><a href="http://www.nikonusa.com/en/learn-and-explore/article/h7ruii10/understanding-auto-iso.html" target="_blank">Understanding Auto ISO | Changing ISO on the Fly from Nikon</a></p><p></p><p>On one hand, Nikon states "Although most Nikon digital cameras with Auto ISO allow you to use the feature in all shooting modes—Program, Aperture Priority, Shutter Priority, Manual, Scene modes—the effects may be more noticeable when you’re in Manual or Shutter Priority modes." and "In Aperture Priority, the aperture value is set by the user and the shutter speed value is determined by the camera system. If light levels change and the shutter speed required to achieve the correct exposure is beyond the shutter speed range of the camera, ISO Auto will increase the sensitivity. *As the shutter speed range of a D-SLR is very large, it is rare that a shutter speed beyond the range of the camera (i.e. 30 sec) will occur under normal lighting conditions.", which suggests that using Auto ISO in Aperture Priority is of no use.</p><p></p><p>On the other hand, it also states that "Within the Auto ISO settings, you can also set the minimum shutter speed where this “jump” to a higher ISO will occur. If you are don't mind handholding the camera to 1/60 sec. shutter speed, set that as the minimum shutter speed. Want to minimize the possibility of camera shake—then set the minimum shutter speed to 1/250 sec. The Auto ISO feature tells the camera to change the exposure based on the changing light. As the light in the scene dims, the shutter speed will drop to let in more light, to ensure a correct exposure. When it hits the "minimum" shutter speed that was set, the ISO increases to keep the exposure correct."</p><p></p><p>My expectation has been along the lines of the previous statement, viz. the D7100 in A mode will first tweak the shutter speed at the current ISO setting, and raise ISO only when it reaches the minimum shutter speed. But I don't think that has been my experience, as I believe the camera lets me take shots in A mode at speeds slower than my specified minimum. Will confirm this and report back, but would be interested to hear if that would be considered normal behavior of the Auto ISO feature.</p></blockquote><p></p>
[QUOTE="gustafson, post: 543410, member: 40735"] Went and read up on auto ISO, and while it helped, I still have some confusion about how it works. [url=http://www.nikonusa.com/en/learn-and-explore/article/h7ruii10/understanding-auto-iso.html]Understanding Auto ISO | Changing ISO on the Fly from Nikon[/url] On one hand, Nikon states "Although most Nikon digital cameras with Auto ISO allow you to use the feature in all shooting modes—Program, Aperture Priority, Shutter Priority, Manual, Scene modes—the effects may be more noticeable when you’re in Manual or Shutter Priority modes." and "In Aperture Priority, the aperture value is set by the user and the shutter speed value is determined by the camera system. If light levels change and the shutter speed required to achieve the correct exposure is beyond the shutter speed range of the camera, ISO Auto will increase the sensitivity. *As the shutter speed range of a D-SLR is very large, it is rare that a shutter speed beyond the range of the camera (i.e. 30 sec) will occur under normal lighting conditions.", which suggests that using Auto ISO in Aperture Priority is of no use. On the other hand, it also states that "Within the Auto ISO settings, you can also set the minimum shutter speed where this “jump” to a higher ISO will occur. If you are don't mind handholding the camera to 1/60 sec. shutter speed, set that as the minimum shutter speed. Want to minimize the possibility of camera shake—then set the minimum shutter speed to 1/250 sec. The Auto ISO feature tells the camera to change the exposure based on the changing light. As the light in the scene dims, the shutter speed will drop to let in more light, to ensure a correct exposure. When it hits the "minimum" shutter speed that was set, the ISO increases to keep the exposure correct." My expectation has been along the lines of the previous statement, viz. the D7100 in A mode will first tweak the shutter speed at the current ISO setting, and raise ISO only when it reaches the minimum shutter speed. But I don't think that has been my experience, as I believe the camera lets me take shots in A mode at speeds slower than my specified minimum. Will confirm this and report back, but would be interested to hear if that would be considered normal behavior of the Auto ISO feature. [/QUOTE]
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Nikon DSLR Cameras
D7100
D7100 Issues with Aperture Priority Mode
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