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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 25 Jun 2011 (Saturday) 06:49
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Multi mode flash

 
maltau571
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Jun 25, 2011 06:49 |  #1

Does multi mode mean HSS cause I am interested in buying the YN468 ttl flash


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maltau571
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Jun 25, 2011 18:20 |  #2

anyone pls


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Curtis ­ N
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Jun 25, 2011 18:29 |  #3

From where are you reading this?

It sounds like an advertising term. Many flash units have several modes - E-TTL, manual, slave, stroboscopic, etc.


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Jun 25, 2011 22:08 |  #4

It looks like the mode you would use to get multiple exposures with one shutter opening.


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dedsen
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Jun 25, 2011 22:19 |  #5

Here is what Yongnuo describes it as.
http://www.hkyongnuo.c​om/e-detail.php?ID=241 (external link)
There is no mention of HHS.



  
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msowsun
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Jun 26, 2011 04:37 |  #6

maltau571 wrote in post #12654788 (external link)
Does multi mode mean HSS cause I am interested in buying the YN468 ttl flash

No, "Multi Mode" means stroboscopic flash.

http://photonotes.org …/index3.html#st​roboscopic (external link)

Stroboscopic flash.

In flash photography the term “stroboscopic” refers to a photographic technique whereby a number of brief pulses of light are emitted during the course of a photographic exposure. The result can capture, for instance, half a dozen steps of a dancer in motion. Each step would be recorded on the same frame, like a multiple exposure. To take a stroboscopic photo you need to have a very dark background that doesn’t reflect much light. If you have a bright background you’ll find that the multiple pops of light from the flash will build up cumulatively to overwhelm the foreground subject. You’ll probably also need to experiment a fair bit to determine the ideal number of light pulses to cover your action appropriately and the output settings required to expose the subject correctly. In the case of film you’ll probably want to use negative (print) film and not slide film for such a photo, since the former has much wider exposure latitude.

Setting stroboscopic (MULTI) flash.

High-end Canon hotshoe flash units have a stroboscopic mode, activated by pressing the mode button until MULTI is displayed on the rear LCD panel.

You can then enter the firing frequency in hertz (ie: the number of flashes per second) and the power output setting. The 5xx flashes also let you specify the actual number of stroboscopic light flashes as well. The 4xx flashes don’t, so you have to calculate that number from the time period the shutter is kept open and the number of flashes per second you’ve set. The maximum firing frequency of the flash varies from flash model to model, but it ranges from 5 to 199 Hz. Power settings also vary - the 430EZ and 540EZ, for example, cannot use stroboscopic flash at full or half power - only 1/4 power and down. You can’t use stroboscopic flash with second curtain sync.

Naturally there’s a relationship between these settings - you can’t fire many times at higher power settings if the firing frequency is high, for example, since the flash needs time to recharge. The flash manual includes a table showing the maximum number of flashes you can expect at different power settings and firing frequencies. There is a risk of overheating and damaging the flash bulb if you pulse the bulb too much, but the flash units have cutoff mechanisms that should prevent this from occurring.

Once you’ve set the flash settings you can put the camera into M (manual exposure) mode and determine how long the shutter should be kept open in order to cover the full field of action for your photo. You can also set the proper aperture. As you do this the flash will display the coupling range on its rear-panel LCD. (press the shutter release halfway if the coupling range information is not displayed) Adjust the power output and aperture so that the coupling range matches the focus distance.

Stroboscopic flash won’t work with the EOS EF-M, 700, 750 and 850 cameras.

Flash units with stroboscopic capabilities:
Speedlites 420EZ, 430EZ, 540EZ, 550EX, 580EX, 580EX II. Stroboscopic ranges:
Speedlite 420EZ: 1-5 Hz.
Speedlite 430EZ: 1-10 Hz.
Speedlite 540EZ: 1-100 Hz.
Speedlite 550EX, 580EX, 580EX II: 1-199 Hz.


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maltau571
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Jun 26, 2011 05:14 |  #7

Ok guys I understand. Thanks


“Photography calls many, but chooses few”
CANON EOS 1000D GRIPPED EF-S 18-55mm IS II-50mm f1.8-SIGMA 18-250 DC OS HSM
WISH LIST : Canon 24-105L - SIGMA 10-20mm
http://www.flickr.com/​photos/maltau571/ (external link)

  
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Multi mode flash
FORUMS General Gear Talk Flash and Studio Lighting 
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