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Old Nov 24, 2003, 7:23 AM   #1
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Default 1/16 flash output mode in Canon 420EX

Can Canon 420EX flash has a smaller flash output e.g. 1/16 so that the re-charge time of the flash can be shortened?

If not, any other model of external flash can do that and use in 10D/300D? I saw someone use one with 10D but do not know the model and brand name.

Further can other flash offer othan than E-TTL mode as sometimes I need to have flash sync with external light for indoor protraints.

Thanks!
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Old Nov 24, 2003, 9:34 AM   #2
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The 420EX has no manual overide to adjust power ratio. The EF-500 DG SUPER is a virtual clone of the 550EX will all theses manual controls for less than $180!

... It has no self-Auto mode (just like the 550EX), but you can always sync it with external studio strobes when on manual through a photo-eye hot-shoe... 8)
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Old Nov 24, 2003, 5:10 PM   #3
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Thanks for your advice. If 420ex cannot do it, I am thinking to get another model for that. 550ex is too expensive. I saw someone attached a very small flash on top of 10D and have very small flash power output. It is Swiss made but I do not know the exact model.

Thanks again!
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Old Nov 24, 2003, 5:52 PM   #4
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FYI

This is the only european flash manufacturer that I'm familiar with:
http://www.metz.de/1_metz_2000/m_pag...name=mecablitz

The 54MZ-3 cost more than the 550EX! Unless you are talking about a smaller unit without E-TTL like the 34CS-2, the above Sigma 500DG Super is probably your best bet... and the cheapest.
http://www.sigma-photo.co.jp/english...la_sup_af.html
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Old Nov 24, 2003, 9:11 PM   #5
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I'm not sure how you know you need 1/6 or whatever amount of flash. The 420EX is pretty smart, but doen't let you mess around (often incorrectly ;-) ) with settings. I'd suggest you try one of these flashes on your camera. While I'm not an expert, my 420EX has met all my needs.
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Old Nov 25, 2003, 5:37 AM   #6
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Quote:
I'm not sure how you know you need 1/6 or whatever amount of flash.
This is why: "1/16 so that the re-charge time of the flash can be shortened?" ie try to shoot with the 420EX rapidly in quick succession... this flash will not be able to keep up with the camera, and eventually one willl end up with several images with no flash until the unit recycle!

At 1/16 one can multiply the Guide Number of the flash by this ratio and use the same unit in manual to shoot close objects in rapid sequences without worrying about recharging time. ie divide this reduced GN by the distance to get the aperture setting for the camera. 8)

Other use for ratio is when one shoot portraits with multiple flashes like hk_traveller was asking: the ability to reduce the side fill-flashes to 1/2 or lower ratio is not only highly desirable, but necessary as well... Check the camera manual for example with the wireless flash in E-TTL, one can program the remote group/units for different ratio. It's just not possible with the 420EX, that's all.
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