Quick Summary: The remote shutter release is a critical component for DSLR/mirrorless astrophotography to help minimize camera movement. Let's look at why you need one for Astrophotography.
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Here's where we can explore things a bit more, maybe compare to other stuff we have.
Q: Will it work with my... (two spaces after this)
A: It will if you...
Q: Is it good for... (two spaces after this)
A: It is if you...