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Forum: Troubleshooting and Beginner Help
04-13-2019, 12:00 AM
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No, you are using the wrong words, The metering is not affected by pushing the back button, it is turned on. By being turned on, it will set the shutter speed as the brightness changes.
This is by design and intent of back button focus. When you activate the camera by pressing either the shutter button, the LV button or the back button focus button. The meter in the camera is turned on by pressing these buttons. Is it absolutely necessary to press only the shutter button to start the exposure sequence? --- No - absolutely not.
---------- Post added 04-13-19 at 12:02 AM ----------
Please re read the following.
Now, as for the K-70 being able to differentiate between back button focus and exposure lock (manifested by displaying a * in the viewfinder) I can not say as all of my cameras have separate buttons to control AF and AEL.
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Forum: Troubleshooting and Beginner Help
04-11-2019, 01:14 PM
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No, you are not missing something.
Using the back button for focus starts the process to start the focus process, which is basically the same thing as ""starting the camera". When either the shutter button is pressed to "start the camera" or the back button is pressed to start focus - which is essentially "starting the camera" the meter will be started.
Now I have noticed that pushing the back button focus on my K-3II will be somewhat delayed when the battery has been used for some time. Add into this I have the dust-removal running on each power up so there is a delay punching the button (either one) and having the system respond.
When the camera "goes to sleep" it will come back to the present (rather than the trite term come back to life) by pressing either the Menu button, info button, AF button etc. When you press a either the LV button/switch, AF button or shutter button, the meter starts and the camera is getting ready to take a picture.
As Adam stated above the * in the viewfinder is the AEL lock (exposure lock) and the exposure meter has to be operating for the * to show up.
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Forum: Troubleshooting and Beginner Help
04-10-2019, 07:10 PM
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Given my experience with Pentax ( *ist Ds, K10D, K20D and K-3Ii) and back button focus it works as follows.
Pressing the shutter button activates the metering system. That's all.
The use of back button focus does not effect the metering system at all.
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