Aperture mode

[Vinver66]

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This weekend I was out shooting with my M10-M. For the duration of the day I had my ISO ring on Auto. My Aperture ring on F8 and my shutter speed at 1/500.

 

when I reviewed my images I was expecting them to have different ISO setting but a fixed shutter and Aperture. However, I had a fixed shutter speed (which was fine) but then I had different aperture and ISO settings.

what am I doing wrong?

thanks for your help

Vincent

[Dennis]

It's normal. Also if you shoot fully in manual, your f/stop (aperture) often is different from the one you used. It's a guesstimate. In the M-mount, there is no linkage that transmits the aperture data from the lens to the body. This happens also in 6-bit coded lenses. You can shoot all day long at f/16 (to say one), and then you find out that your exif tell you f/13, f/19, f/22.

Forget about this, it's irrelevant for you to make great imagery.

Welcome to the forum.

  

 

[pedaes]

 

2 hours ago, Vinver66 said:

This weekend I was out shooting with my M10-M. For the duration of the day I had my ISO ring on Auto. My Aperture ring on F8 and my shutter speed at 1/500.

 

when I reviewed my images I was expecting them to have different ISO setting but a fixed shutter and Aperture. However, I had a fixed shutter speed (which was fine) but then I had different aperture and ISO settings.

what am I doing wrong?

thanks for your help

Vincent

Welcome to the Forum.

See also this Tread. 

 

[Vinver66]

Thank you. Good to know it is not something I need to worry about. I thought for a moment that I had a fault of some Dort.

 

[Stef63]

Hi Vincent,

Although the M10M can handle high ISO fairly well the lower the ISO the cleaner the file will be.  So unless you were constantly shooting fast moving objects I would also set the speed dial to Auto and two times the focal length to ensure no camera shake, the Auto ISO to a max of 6400 ISO for example.   With the aperture ring you select the depth of field and Auto speed and Auto ISO will - within their set limits - automatically be selected to the lowest possible value combination.  

For more static scenes it makes no sense to set the speed fixed to 1/500 and let the Auto ISO compensate accordingly.  Although the M10M has a very good ISO performance, a ISO 200 file will always show less noice than a ISO 800 file. While a shot taken at 1/125 with a normal or wide lens will be no different than the shot taken at 1/500.

Again this technique does not apply for fast moving subject.  

[Vinver66]

Thank you. That makes sense. I’ll try that at my next shoot.