Canon 90 EX for beginner as a Master unit?

Started Jan 4, 2013 | Discussions thread
Sailor Blue
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Re: Canon 90 EX for beginner as a Master unit?
In reply to DoctorPDA, Jan 4, 2013

As far as I can tell from the specs the Canon 90EX is NOT a master flash.  In fact the only master flash that Canon currently makes is the 600EX-RT.  The recently discontinued 580EX II is also a master flash and can still be found for sale.

The 90EX would not do what you want.  It is also fixed without the ability to tilt and rotate the flash head.  Frankly it is not worth buying.

E-TTL is really only good if the subject to flash distance is constantly changing, which is not true in most off-camera flash situations.  When you use E-TTL the subject exposure will usually change when you change the ratio of subject to background by zooming with your feet or lens.  The result is that you wind up having to adjust the exposure of every image in post processing to keep the skin exposure consistent.

Most photographers use off-camera flash in the manual power control mode, not E-TTL, so that the stationary subject's exposure is exactly the same every time.  By placing your built-in flash in manual power mode with a power of about 1/64th of full power it can act as a trigger flash for any flash with a built in optical slave indoors.  Outdoors bright daylight can interfere, even with the flash at full power so using a set of budget priced RF triggers like the Yongnuo RF-603 is a better solution.  Check ebay but be sure you get ones that are compatible with your camera.

If you want a good flash that will work in E-TTL mode on your camera but can be used in manual mode off camera the Yongnuo YN-468II is available.  A more powerful flash is the YN-565EX, which will work in E-TTL mode either on or off the camera.  Both these flash units have built in optical slaves and the head can tilt and rotate but neither of them is a master flash.

Speedlights.net | Yongnuo YN-468II E-TTL Speedlite Flash “Mark 2″ (E-TTL II on-camera only)

Speedlights.net | Yongnuo YN-565 EX Flash Review (Equiv 430EX II & ETTL-II on/off-camera)

If you want a master then I recommend you find a 580EX II or a Nissin Di866 II.

Speedlights.net | Canon Speedlite 580EX II Flash Review

Speedlights.net | Nissin Di866 II (Mark 2) | Speedlights.net

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