Alpha 7RII in Auto Mode gives produces very high ISO shots.

[Giancarlo]

I just bought a Sony Alpha 7RII. I had already a Sony RX10III. Sony is a new experience to me as for 30 years I always used Nikon or Canon. 

Well, the issue is that the A7RII when set to Auto Mode [intelligent] always chooses high ISO values that, in addition to be useless, produce low-quality images. For example, when I frame a scene where my SonyRX10III gives 1/30 f2.8 ISO = 100 (the same as my Nikon does), the A7RII gives 1/200 f2.8 ISO = 3400! I do not need to shot at 1/200! Maybe there is some setting to change in order to make the Auto Mode to chose lower ISO values?

 

Sorry for my bad English 

[Username]

........ the A7RII when set to Auto Mode [intelligent] always chooses

high ISO values that, in addition to be useless, produce low-quality

images. For example, when I frame a scene where my SonyRX10III

gives 1/30 f2.8 ISO = 100 (the same as my Nikon does), the A7RII

gives 1/200 f2.8 ISO = 3400! I do not need to shot at 1/200! ........

     

Something's wrong with those numbers. To bump up to 1/200 

from a 1/30 only need to bump from ISO 100 up to 640. 3400 

is just waaaaaay outa line. The result would be about 3 stops 

over exposed, assuming that 1/30 @ 2.8 was good exposure 

in the first place. Does it result in over exposure when it goes

up to ISO 3400 ?  

[Colorado]

You can limit your auto ISO range to whatever value(s) you believe are usable.

[JCC]

If you know what shutter speed you want, you could shoot in S, shutter priority. 

 

If you know you want F2.8 you could shoot in A, aperture priority. 

 

If you know both of these values, you could shoot in M, manual, and choose your own ISO to properly expose the shot. 

 

Without seeing the file from the camera, no one can make more than a generalization.

 

JCC

[Guest Jaf-Photo]

Intelligent auto is not really my thing. But I believe it takes the lens into accout. So, the different numbers may be a result of different types of lenses (and also a different robotic interpretation of the scene). For instance, if you're using a fairly long lens with a low transmission rate, then the camera will bump both shutter speed and ISO. (There is the obvious question why drop $3000 on a camera to use it on auto, but I'm trying to have an antic-free day, so I won't ask.)

[Kirkp]

I have a lowly NEX-6, but assume its intelligent auto mode is similar to the 7RII. In that mode the camera attempts to analyze the image to decide which of about scene types you have. Then it will choose settings that a Sony engineer thought best suited for that scene type. It often makes adequate choices, but you must keep an eye on the settings it is choosing and be ready to switch to a less automated mode if you disagree with its choices. I often use auto if the scene isn’t too demanding and I’m in a hurry.