Usually when i change the TV shutter priority mode i was able to change the aperture settings earlier, i was looking in display at the back side of camera.
I have brought this cam last year and have been able to change the settings for aperture in shutter priority
When you set Tv (shutter priority) exposure mode, you cannot change the aperture manually. The camera changes it.
When you set Av (aperture priority) mode, you cannot change the shutter speed manually. The camera changes it.
When you have it set to P (program) mode, you cannot directy change either shutter or aperture. The camera adjusts them both automatically.
If you set M (manual) mode, you have to choose both shutter speed and aperture. The camera doesn't select either, but it does "recommend" a setting with an indicator on an exposure scale.
Tv, Av, and P all can be adjusted a little using Exposure Compensation.
We're trying to understand what you are doing... but need more info.
First, to keep things simple I suggest you set the ISO yourself. Don't enable Auto ISO
When you set the camera's exposure mode dial to Av (Aperture Priority), you choose the aperture and the camera provides auto exposure (using it's built in metering system) which will select what it thinks is the appropriate shutter speed. There are a couple ways to see the aperture that you're selecting. It's displayed on the camera's rear LCD and in the viewfinder. The shutter speed the camera is selecting (only when you half-press the shutter release) will be displayed the same places.
If you set the camera to Tv (Shutter Priority), it's reversed. You choose the shutter speed and the camera selects the aperture it will use.
In both modes, if the camera is unable to achieve what it thinks is an accurate exposure, if lighting is too bright or too dim for the range possible with your settings, the camera will try to warn you by flashing either the shutter or the aperture readout.
Check out the illustrations in the manual (pages 24 & 25 of the English version)... It shows where you'll find this info. If you aren't seeing it in those places on your camera when using it properly, there may be a fault (a lens that's not fully locked in place will cause aperture to show as "00", for example). Or your setting are wrong in some way. Or, the least likely possibility, there is some fault with the camera.
After looking at the manual, if things aren't clear, tell us more about what you are trying to do and what you're seeing.... Maybe we can help.
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