What is Reddit's opinion of Digital Exposure Handbook?
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1 review of this product found across Reddit:

Honestly if you don't know what they need from asking them, a gift card to Amazon. I'd much rather have that and spend it on what I need or whatever G.A.S. tells me I need than to receive a piece of kit that I didn't choose. I don't mean to sound rude, it's just that I rather prefer researching and choosing my own gear.

If you absolutely must, though, I recommend a book.

https://www.amazon.com/gp/product/1907708952/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1

https://www.amazon.com/gp/product/0817439390/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1

https://www.amazon.com/gp/product/0961454733/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

https://www.amazon.com/gp/product/159711247X/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1

https://www.amazon.com/gp/product/0312420099/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

Or a notebook for taking notes while out shooting, scouting, etc.

https://www.amazon.com/gp/product/8883701127/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1