lennon33x
No longer a newbie, moving up!
- Joined
- Jul 28, 2012
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.High speed without HSS
Apparently, although I haven't confirmed this, at very high shutter speeds, another method (avoiding HSS) is to envelop the entire shutter operation with the flash duration, by setting a variable-duration flash to full power. Flash distance from the subject is then used to vary exposure. I'm not sure why flash output waveform isn't visible as a decrease in light across the image (i.e. "shutter creep"), since higher shutter speeds don't actually increase the curtain speed but instead narrow the opening that passes over the sensor. Here is a video that I don't fully understand: Breaking The 1/250s Sync-Speed Trick! - YouTube
If you understand that, information would be appreciated. I guess I'd be curious to see if his image looked different if he held the camera upside-down here.
As a final note, remember an alternative to high-speed may be to use an ND filter, if your goal for high-speed is simply to preserve bokeh in a bright scene.
I watched the video, originally and had posted on a similar issue on another thread. The video, in general is not very helpful. It just explains that in order to combat banding due to the rapid closing of the second curtain that you need to have either a.) a longer flash duration to "beat" the second curtain, or b.) have an HSS light that fires the multiple pulses of light as the curtains are closing.
And in regard to color, how much to be seen is going to be negligible. In the shots I used, it was an ungelled strobe. In order to get white balance correct, I should have used a CTO gel, but all I was demonstrating was HSS. In midday sun, where HSS is most utilized, gels are not likely to be used because the color temp of the flash is similar to the ambient color temp.
I've come to equate this thread similarly to the way I treat my patients (I'm a student nurse). Understanding the anatomy and physiology of patients (equivalent to the technical specifications of flash is important), however how useful remains to be seen. Ask a veteran nurse of 20 years how myofibrils work in the muscle - in most cases, they won't remember. Because I ran through my thread similarly about 2-3 weeks ago, what I learned is that a.) I can combat motion and the HSS barrier with my current setup and b.) how do I utilize it and c.) how does it affect my images.
I used to own a $20 RF trigger off of ebay. While it didn't work consistently, when it did work, it was MUCH simpler to shoot with. I rarely focused on all the other nuances of HSS and shadows, etc. Granted, I'm learning more, my new system allows me to do much more. Finding what works for you, and how to best utilize it will be more valuable than remembering information that won't tell you how to set up your shot.