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11/11/2004 12:13:59 AM · #1 |
Just curious, if anyone here with a 20d has either, can you tell me how many shots you can fire off at 5ps with the flashes? Also, is the speed significantly different?
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11/11/2004 12:14:42 AM · #2 |
| probably should look at the 580 as well, given that it is better integrated with your camera than either of those... |
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11/11/2004 12:15:48 AM · #3 |
Originally posted by Gordon:
probably should look at the 580 as well, given that it is better integrated with your camera than either of those... |
too much money.
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11/11/2004 12:22:49 AM · #4 |
Are there any other similarly powerful flashes, that are as fast or faster for less money if they dont have the canon name all over it?
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11/11/2004 12:25:44 AM · #5 |
| sure. but they don't work so well with the 20D. You'll lose support for things like high speed sync and some of the E-TTL II features. |
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11/11/2004 12:27:02 AM · #6 |
Originally posted by Gordon:
sure. but they don't work so well with the 20D. You'll lose support for things like high speed sync and some of the E-TTL II features. |
Just out of curiosity, what flashes?
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11/11/2004 12:37:05 AM · #7 |
The recycle time on the 550 is faster than the 420, but both flashes will fire 9 shot bursts at 3fps on the 10D. I do not know how far they will go on the 20D. The 20d will keep firing after 9 shots if the CF card is fast enough to keep up with the camera.
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11/11/2004 12:47:40 AM · #8 |
| The 580 is supposed to be 25% faster recycling than the 550, according to Canon. |
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11/11/2004 12:59:15 AM · #9 |
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11/11/2004 01:15:21 AM · #10 |
You will NOT be able to fire off 5 frames per second with each frame having full power on the flash. Even with external battery packs, it simply won't happen. Yes, the flash *may* fire on every shot but you are not giving it a chance to charge back to full power. Canon flashes will fire when below a full charge. I guess Canon's thinking is that a half flash is better than no flash.
I'm not sure about the 420ex but with the 550ex and the 580ex you can go manual and set your flash to MULTI, this will give you a flash on every frame on a 5 frame burst, but the flash will only be firing at 1/2 power, 1/4, 1/8 etc.. you have to manualy program the power on the flash and set your exposure for it.
As I mentioned above, the best way to guarantee fast recycling times, is to get a HIGH VOLTAGE external battery pack. This will let your flash electronics run off the AA batteries and the external pack will charge the capacitor in your flash and will do so at a faster rate than just the AA batteries. Still, this will not give you a full power flash for every frame at 5 frames per second.
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11/11/2004 01:17:59 AM · #11 |
The 540ez or any 'EZ' line of flashes does not support E-TTL. I beleiev that you have to set the power manualy on the flash. In a nut shell, don't get it. It's not made to operate properly with EOS Digital camera series and you loose functionality. |
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11/11/2004 01:57:59 AM · #12 |
Originally posted by Jason:
You will NOT be able to fire off 5 frames per second with each frame having full power on the flash. Even with external battery packs, it simply won't happen. Yes, the flash *may* fire on every shot but you are not giving it a chance to charge back to full power. Canon flashes will fire when below a full charge. I guess Canon's thinking is that a half flash is better than no flash.
I'm not sure about the 420ex but with the 550ex and the 580ex you can go manual and set your flash to MULTI, this will give you a flash on every frame on a 5 frame burst, but the flash will only be firing at 1/2 power, 1/4, 1/8 etc.. you have to manualy program the power on the flash and set your exposure for it.
As I mentioned above, the best way to guarantee fast recycling times, is to get a HIGH VOLTAGE external battery pack. This will let your flash electronics run off the AA batteries and the external pack will charge the capacitor in your flash and will do so at a faster rate than just the AA batteries. Still, this will not give you a full power flash for every frame at 5 frames per second. |
This is OK for burst flashing in most cases. Some flash is better than no flash, and when burst flashing, you are not normally depending on the flash as the primary light source. If you are, you gotta spend a lot more money :)
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