Tag Archive for: flash

How to very easily find out your flash duration

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Flash duration and freezing motion

Freezing motion is fun

One of the things I always love to do during photoshoots is add some motion to the shots.
If you have ever tried this, you will probably know it’s all about timing. But even then, you probably noticed that sometimes the images are razor sharp and sometimes a bit blurred. How is this possible when you use the same strobes? Read more about flash duration and freezing motion.

The first thing you think is of course, that you probably timed it slightly differently.
But the reason is probably somewhere else.

Flash duration

You may have already noticed the flash duration in the specs of your strobes.
But how do you read this?
Well, that’s the problem when you see 1/1.000-10.000 T.1 or T.5. It probably doesn’t really ring a bell.
I will not make it too technical but see the flash duration as your shutter speed.

When you take a picture in your studio without strobes the images should be black. Because we have to take into account the X-sync in the studio (otherwise you see those nasty black bars) we shoot at 1/125 in the studio. Normally this would make it impossible to freeze motion. But because the flash is just a pulse MUCH faster than 1/125 it’s not a problem.

So that T.1 and T.5 values can be seen as your shutter speed (as a reference, it’s slightly more complicated).
For me, a T.5 value higher than 1/2000 is enough to freeze most motion. Anything higher than 1/5000 is awesome for really razor-sharp motion with models.

I already told you that the values don’t really tell the story. This is because they will vary over the output of your strobe.
Some strobes are super fast on the lowest setting, and some are the fastest on 75%
At first sight, you might think that it doesn’t really matter. But imagine shooting a jumping model on the lowest setting, that would not give you a lot of playroom with your depth of field. So, being able to shoot it with more power is very much needed. This is why most professional strobes have the fastest flash duration at 50-80%.

There are two ways to see the flash duration really fast.

Flash duration and freezing motion

Important gear for freezing motion

Sekonic 858

Although the Sekonic is a lightmeter it also has a great feature that makes it possible to measure the flash duration and even show the graph. But this is an expensive solution.

The fan

A much cheaper, but less accurate, and more fun way is to use a fan.
Put the fan on full power.
Place your camera on a tripod, adjust the strobe from lowest to full power, and take an image every stop (of course adjust the aperture).
In Lightroom you can now easily see in which images the blades are frozen most.

In this video, I tell you a bit more about freezing motion.

And some of the images from the video.

During the workshops, we talk a lot about technique, lighting, coaching the models, retouching, and in essence every topic the attendees want to learn about.
Do you also want to visit a workshop?
Most workshops at fotografie-workshops.nl are in Dutch, but if you let us know a few weeks in advance and we can switch them to English.

flash duration and freezing motion

How to shoot fire works or Christmas lights 

More about the light meter 

Using the foreground to add dimension to your images

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Sometimes we need something extra

We all know that when we want to show scale it’s handy to include something to show the scale.
In the case of a mountain we can of course place some people in front but today we are doing something else.

During the workshop “on location in Emmeloord” the challenge is to find locations that look not so interesting but still create some cool images.
If you ever visited our studio you know there always was an old building just in front of our studio, it didn’t look nice but it had some great walls to shoot against 😀 one of them actually made it into my signature ClickBackDrop backgrounds.

Recently they demolished the building and we ended up with a large empty building area.
Of course a great option for this workshop.

The lighting setup was pretty simple, one Geekoto with a large reflector shooting on manual mode.
During the workshops we have to shoot with so called universal triggers due to the different camera brands that are used during a workshop, this means we can’t use extra options like HSS and ETTL.  

The setup itself was ok.

But I wanted something more. Something to give the image more dimension and framing.
Because I’m shooting from a very low angel I decided to include a few of the flowers in the frame.

This already made a huge impact.
But because Nadine is pregnant we also needed a slightly different pose, and I slightly tilted the camera for a nice effect and include the sun.

I also shot on extra image from a slightly higher angle to experiment with.
I ended up with a darker look which to my surprise became the favourite image for Nadine 😀
So always shoot something different, you never know what hits the spot.

Now that we talked about the setups and the framing of the shot, let’s take a look at the video from this setup.

Also want to visit a workshop?

Today I showed you one of the  different sets we did during the workshop outside with Geekoto strobes “on location in Emmeloord” with Nadine.
During the workshops I always try to use 3-4 different setups explaining different techniques and of course it’s a great way to get a good addition to your portfolio.

If you think “that’s for me”
Than visit photography-workshops.eu for the Dutch workshops.
But if you are not living in the Netherlands or don’t speak Dutch we also have other options.
If you let is know 2 weeks in advance I can teach the workshop you want to visit in English.
Or if you can’t travel to our studio we also now offer the option to get a full 1:1 experience with 5 different camera angles, lightroom/Photoshop view and a talkback channel, you also get all the raw files and retouched results from the workshop. Visit our online workshops page for more info.

Working on location with strobes and making something boring interesting

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From the workshop on location in Emmeloord

During the workshop “on location in Emmeloord” we scout for locations that look not so interesting but the challenge is to create some cool images anyway. This is a great training exercise because let’s be honest in most cases working on location is not as superb as often hoped for, but we are still expected to deliver awesome images.

For me there are a few different things I use to make a location look more interesting.

The first is of course the location itself, I try to find angles or other details (small or large) that I can use, or that I don’t want in the shot.
In this location we loved the onion crates, they blocked off the sunlight for a large part, which is always handy when working in the bright sun. The less direct sunlight on the model the better in this case.

After I have something in my mind for the general location I’m going to use in the set it’s of course time for the lighting.
In this case I’m using the Geekoto strobes aimed at our model Nadine from the side to create a nice light patten on the crates. Although this was nice we wanted something more, so I added a blue gel to the set. But as you can see in the video and images we started with a more flat lighting setup.

Of course we can talk about, but often a video is much better, so here we go 😀

And also lets take a look at the images separately

Also want to visit a workshop?

Today I showed you the results from one of the sets we did during the workshop outside with Geekoto strobes “on location in Emmeloord” with Nadine.
During the workshops I always try to use 3-4 different setups explaining different techniques and of course it’s a great way to get a good addition to your portfolio.

If you think “that’s for me”
Than visit photography-workshops.eu for the Dutch workshops.
But if you are not living in the Netherlands or don’t speak Dutch we also have other options.
If you let is know 2 weeks in advance I can teach the workshop you want to visit in English.
Or if you can’t travel to our studio we also now offer the option to get a full 1:1 experience with 5 different camera angles, lightroom/Photoshop view and a talkback channel, you also get all the raw files and retouched results from the workshop. Visit our online workshops page for more info.

Working with strobes on location and how to kill the ambient light part II

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Day2Night photography can give you great results

One of the techniques I love to use on location is Day2Night.
With Day2Night we mimic a night or evening scene during day time.
As you can imagine you need some powerful lights to achieve this, or some cool tricks.

In the previous blogpost you saw me using HSS, and I got some questions about HSS and other techniques that I will try to answer in this blogpost.

X-Sync

When we look at a how a camera works the X-sync is easy to understand.
Let’s take a look at the older cameras and for the newer cameras just forget the mirror part.

When we take the photo, the mirror locks up and the first shuttercurtain opens, at one point followed by the second curtain closing the film/sensor again for light.
The faster you set the shutter the faster the second shuttercurtain will follow the first.
Now you have to understand that when you use a strobe/flash all its power is emitted at once, so it’s just a pulse. And that pulse is REALLY fast, they can for example easily be between 1/2000-1/50.000. As a rule of thumb, the more advanced the strobes the faster the flashduration.

Now that we know that the strobe is just a pulse it’s also easy to understand that the X-sync is the maximum shutterspeed in which the whole sensor is open for the light hitting it. Anything faster and the second shuttercurtain will follow. And we probably all saw that problem at least a few times, the black bar on top of your image where you probably wondered where it came from, but it disappeared when you lowered your shutterspeed. That’s the X-sync.

The X-sync will vary a bit per camera, but as a rule of thumb we can say that with normal strobes you can shoot up to 1/125 on 99% of the systems, sometimes with speed lights you can get up to 1/250 but that’s about it. This means that we often end up with smaller apertures and a less shallow depth of field than you might want, so what to use when you want that nice shallow depth of field?

Geekoto GT200 Portable Off-Camera Flash

HSS

With High Speed Sync we can overcome the X-sync problem by using the strobe not as one pulse but by using the stroboscopic effect and this way the strobe acts almost like a super powerful continuous lightsource. The disadvantages are of course that you will burn through your batteries faster and the strobes are more prone to overheating, so my advise when using HSS is to take it a little bit easier and let the strobes cool down between series and shoot slightly slower.

Also when shooting HSS remember that the power-output is a lot lower than on manual.
But thanks to HSS it is possible to shoot on a very high shutterspeed and wide open aperture to create great images with a shallow depth of field, something that was not possible without HSS.

For outside sessions I’m mostly using the Geekoto GT200 and GT250. Both support HSS and have more than enough power to use even during bright sunlight.

There are also some other options at the moment like the Sony Global shutter sensors which makes it possible to shoot up to insane shutterspeeds with strobes. There are some limitations you need to know, but this is one of the biggest steps forward for flash photography in decades.

Manual mode

Todays images are part of the workshop “on location in Emmeloord” we did with our Model Nadine.
In this workshop we look for uninteresting locations and the challenge is to make it interesting with the use of strobes.
This wall is next to our studio and we loved the combination of Nadine’s outfit and the color of the Fence.

In the video I explain the lighting setups and how to incorporate a gel and the sun in the final shots.

And of course here are the images from the video.
As explained in the video these were shot on manual mode.
The reason we use manual mode during the workshops is because HSS is camera dependent, if you use your strobes yourself that’s no problem but during workshops we have attendees with different camera brands, so we have opted for a so called universal system that will just trigger the strobes on manual mode. Because I use my strobes on Manual mode in 99% of the cases this is not a real problem, the only limitation is of course the X-Sync. But as you can see we have plenty of power in the Geekoto’s 😀

Also want to visit a workshop?

Today I showed you the results and of the  sets we did during the workshop outside with Geekoto strobes “on location in Emmeloord” with Nadine.
During the workshops I always try to use 3-4 different setups explaining different techniques and of course it’s a great way to get a good addition to your portfolio.

If you think “that’s for me”
Than visit photography-workshops.eu for the Dutch workshops.
But if you are not living in the Netherlands or don’t speak Dutch we also have other options.
If you let is know 2 weeks in advance I can teach the workshop you want to visit in English.
Or if you can’t travel to our studio we also now offer the option to get a full 1:1 experience with 5 different camera angles, lightroom/Photoshop view and a talkback channel, you also get all the raw files and retouched results from the workshop. Visit our online workshops page for more info.