Sony a7CR Help Manual page 307

Help Guide
Interchangeable Lens Digital Camera
ILCE-7CR
α7CR
Release w/o Lens (still image/movie)
Sets whether or not the shutter can be released when no lens is attached.
MENU →
1
Menu item details
Enable:
Releases the shutter when no lens is attached. Select [Enable] when attaching the product to an astronomical telescope,
etc.
Disable:
Does not release the shutter when a lens is not attached.
Note
Correct metering cannot be achieved when you use lenses that do not provide a lens contact, such as the lens of an
astronomical telescope. In such cases, adjust the exposure manually by checking it on the recorded image.
(Shooting) → [Shutter/Silent] → [
5-054-923-11(1) Copyright 2023 Sony Corporation
Release w/o Lens] → desired setting.
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