High Speed Sync vs ND

Lesson Info

High Speed Sync vs ND

Do you guys know what the benefits and drawbacks of high speed sync versus ND's? When you raise your shutter speed up, you guys saw the flashes. Let me show you this again. Look at these flashes. Okay, what's happening is the sync speed on a flash means that under 1/200th of a second, your radio can communicate to the flash and it can fire in time. By the time the shutter speed, the shutter opens and it closes, it can fire off the flash. When you go above that, it can't match the speed, right? So what ends up happening is, if it actually lets you do it, this doesn't even let me do it. I can't bring the shutter speed above 1/200th of a second. But if it lets you do it, you get a black bar. You guys see the black bar that goes across the image where the flash fires in one section and doesn't fire in the other section? That's a sync speed issue. With happens is with full-feature flashes that offer high speed sync, when you use high speed sync, that flash didn't get- Nothing changed physic...

ally with the flash. It can't now fire within that 1/400th of a second or 1/800th of a second just because you pressed a button. What ends up happening is it pulses. So when I press this test button, you see that pulse? It does that exact same thing when you are firing high speed sync. Now if it's pulsing 50 times to fit in one of those shots into your shutter speed. Let's say at 1/1000th of a second, it has to pulse 50 times, like this. What happens to your flash power? It just dies, right? What if it has to pulse 100 times to get in a single frame at 1/4000th of a second? Or 1/8000th of a second when it has to pulse 500 times to get in a single shot? Your flash power dies dramatically. What we've found is that you're gonna lose at 1/8000th of a second, you're going to lose around eight to 10 stops of light from your flash. That takes you down to like a small percentage. 100, 50%, 25%, 12.5%, 7%, 4%, I used to be an accountant. I'm a photographer now this is why. Because I think I just halved something wrong. That's alright (chuckling). So, you get down to like 1% to 2% of the total output. Now if you use an ND filter, does your ND filter does this effect flash power? This is like a trick question. Does this actually, does this effect your flash power? (crowd chattering) Yes. This stops down all light coming into the lens. But guess what> If I can get away stopping down four stops of all light to get my shutter speed down to 1/200th of a second, I still have my full flash power. So we're talking about an additional, this will get me four extra stops worth of light power from my flashes versus using high speed sync. Does that make sense? Nod or jump up and down, like, kick someone next to you. Do something like that so I know, yeah? There you go, I got an elbow, good. Little aggressive, but that's cool. So, that's the benefit of an ND filter over high speed sync and it carries true. The funny thing is that manufacturers are going to tell you, "Ooo, the new..." We love Profoto Gear, we use a lot of Profoto Gear. And everyone, Elinchrom, Profoto, everybody, will tell you that, "Oh, it has high speed sync now." For some reason, nobody publishes how much power you're losing with high speed sync. Nobody says it. I'm always like, "Have you guys published "how much power you loss, you lose?" And everybody's like, "No," and I always go test it and it's still the same thing. It's we're losing 7, 8, 9 stops of power, in that range. So, it's one of those things where if you have to, there's certain situations where you'd use high speed sync. That's if you're shooting sports, you need a fast shutter speed to freeze the ambient light. Like if you're shooting sports and you've got this motorcycle driving by your frame, and you need to keep it at 1/5000th of a second to freeze everything, you would use a high power, like a Profoto B1, or even higher power with high speed sync. You're cutting down a lot of the power, but then it's a high-powered strobe. So you still get more "umph" out of it. That's the one situation that you'd use it. Engagement photography, there's no dude on this planet that can run that fast. (audience laughing) Just not going to happen.

Class Description

Lessons

1. Class Introduction
2. Posing Guidance for Him
3. Posing Guidance for Her
4. Foundational Posing
5. Posing Touch Points
6. Couples Body Language
7. Posing Three Point Check
8. Posing Tips with Demo
9. Verbal Cues for Posing
10. Mood Board Tips
11. Posing Questions
12. Camera Settings Quick Overview
13. Location Scouting
14. Seeing the Light
15. Shoot: Natural Light in Studio
16. Homemade Soft Box
17. Shoot: Wrapping Natural Light Around Couple
18. Shoot: Flat Natural Light
19. Special Effects Intro
20. Shoot: Backlighting
21. Shoot: Using Sparklers
22. Shoot: Sparklers and Spray Bottle
23. Shoot: Backlight with ND Filter
24. High Speed Sync vs ND
25. Shoot: Fog and Spray Effects
26. Simple Lightroom Workflow
27. Processing Black and White Images
28. Culling and Presets
29. Editing Using Presets
30. Post Processing Q&A
31. Flash + Ambient Balance
32. Photographers Need to Practice
33. Outdoor Engagement Location Scouting
34. Meeting the Clients
35. Basic Engagement Shots
36. Getting into the Creative Shots
37. Using Photo Mechanic to Cull
38. Culled Edits in Lightroom
39. Editing After Using Tilt Shift Lens
40. Photoshop Editing for Print
41. Engagement University Shot
42. Daylight + Flash
43. Engagement Picnic Scene
44. Composite Street Shot
45. Day For Night Engagement Shot
46. Natural Flash/Bounce
47. How to Make GIFs
48. Simple Composite - University
49. Intermediate Composite - Downtown
50. Simple Background with Reflector
51. Final Thoughts