The 90EX flash is designed to be used with the Canon EOS-M mirrorless camera which does not have an inbuilt flash. The unit is tiny and very lightweight making it easy to carry around so it suits the equally diminutive and convenient EOS-M camera. Despite being tiny, the flash is sturdy and well-made as is typical of Canon. The flash uses commonly available AAA batteries so there's no worries about carrying an extra charger. Of course, it's not a lighting powerhouse but it's more than adequate for everyday work. If you need more light then you can simply use additional Canon flash units ... one of the advantages of buying into a system rather than just a product. If you own a Canon EOS-M camera then this really should be a "must have" accessory. I wouldn't be without it.
Verified purchase: Yes | Condition: New
Power wise it is similar to a built in flash. Not strong but useful for fill in. My main use however is to use it to tiger off-camera speedlights. In this mode the 90EX does not contribute to the exposure. The flashes you see ate pre-exposure and juts to send exposure data to the remote (canon compatible) flash. This make the 90EX a cheap speedlight trigger as well as a small fill in flash.
Verified purchase: Yes | Condition: Pre-owned
While it is not as powerful as many other Canon flashes that is to expected due to its size. It is the perfect size flash for my Canon M3 and is a marked improvement over the built in flash. It is very easy to pack along with the camera and an extra lens when traveling light and carrying a small bag. It works great for medium ranges such as taking family pictures. I would recommend it to anyone looking for a small flash to carry with their M series Canon just look up the specs and be aware of its limitations do to the small size.
Verified purchase: Yes | Condition: Pre-owned
I've had this product before, but the old one got ruined. That's why I bought this again to get the same flash that fits my EOS-M.
Verified purchase: Yes | Condition: Pre-owned
Flash used to drive Canon slave flash and does this very well. It can also be used on my small camera to provide some highlighting detail. The output is very low but sufficient for these purposes. The flash unit was in ‘as new’ condition.
Verified purchase: Yes | Condition: Pre-owned
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