Showing posts with label DSLR. Show all posts
Showing posts with label DSLR. Show all posts

Friday, 3 July 2015

What's a matte box? (and what is it used for)

To put it simply, a matte box is the square thing that you see on the end of movie/video cameras. They have three uses.

1. It prevents lens flare
Unless you want it in your shot, a matte box is designed to cut out lens flare. Usually, a matte box will have adjustable fins on the top and sides. This is its main purpose.

2. It holds filters
More expensive matte boxes allow you to slot filters, like neutral density filters, in front of your lens. This allows you to replace filters faster than the ones that screw directly onto your lenses. Obviously this doesn't really work well if you're using a zoom lens that extends in and out since the matte box is usually fixed to rails beneath the camera.

3. It looks pro
You put a matte box in front of your camera and it automatically looks 100% cooler. Yeah, I know this isn't a proper reason for having one but it does make a DSLR look less like a photography camera and more like a proper movie camera. Image is everything and you should do everything you can to disguise your DSLR when you take it to a video shoot.

Tuesday, 8 July 2014

How to make video look like film

If you want to get the perfect film look, shoot your movie on film. Unfortunately, this isn't always an option for the budget filmmaker so the next best thing is making your video look like film. This is the method I normally use when I attempt a film look. Some might disagree with it but really it's all about what works best for you.

Start by watching a movie and analysing it. It's always useful to take screenshots so you can compare it against your footage as you're grading it. I'm going to show you how to create a 16mm look because I've always loved the way 16mm footage looks. Here's a screenshot of the raw footage.
This is from my 2012 university movie "Malice". I shot this on a Canon DSLR with a 50mm lens during daylight. Picture profile was set to CineStyle so we have a flat sort of look which gives us more room for manipulation in the software. The footage is not very sharp. I can't remember if I properly focused during filming but this is okay because 16mm footage often has a soft look. Aperture was quite narrow (because of the daylight) so there's a greater depth of field. A more shallow depth of field would look more cinematic and help sell the effect better though. I also filmed at 25 frames per second and shutter was set to 1/50. 

I'm using Premiere Pro because there's an interesting effect that I discovered years ago which if useful for creating a film look. In the Utility folder under Video Effects you'll find an effect called "Cineon Converter".
Straight away you can see that this has increased contrast and the shot now looks less flat. Go to "Window>Reference Monitor" and compare the YC waveform before and after.
See the difference? The waveform monitor is a very useful tool so make sure you check it on a regular basis while grading your footage. You can also check RGB values which is useful for correcting wrong white balance (if you ever find yourself in that situation). 

Using the values within the Cineon Converter effect, I increased the contrast until I got this. Notice "Conversion" is set to "Log to Linear", the default setting. 
The blacks in the footage are crushed and overall contrast has been increased. Most film look attempts I see have really high contrast with crushed blacks and blown highlights. This doesn't really make video look like film. From what I can see, film usually has a low contrast look so blacks aren't actually black but a sort of grey instead. Don't worry, we're going to sort this out in the next few steps. You might have to tweak the Gamma and Highlight Rolloff values later to get the desired look since your footage might look different to mine. Try adjusting the other values as well and experiment until you get what you want. Remember, film has more dynamic range than video so you won't be able to get exactly the same contrast in the detail.

Add a channel>invert effect and select "Green". We're going to add an invert effect for each colour channel (Red, green and blue). Set the "Blend with original" to 85% but try playing around with the values to get what you want.

We now have this low contrast shot but it's a bit dark so add a "Brightness>Contrast" effect. Very subtle difference. I set Brightness to 10 and contrast to 25. Furthermore, you might want to apply the "Color Balance HLS" effect and desaturate the colour a little bit. I also adjusted the hue to -0.5 to push the skin tones to red more.
I then added film grain which I got for free off GorillaGrainI just put it on a video layer above my footage and set the blend mode to overlay. Use a Brightness>Contrast filter to make the grain more or less intense. 
I posted a breakdown on YouTube.


So, there we have it. Film has a very unique sort of motion to it though and I have yet to find a way to replicate that. There are hundreds of film look tutorials out there and I really think it's up to the individual to develop their own style. I just keep tweaking settings until I get the look I want and it's not always as simple as copying and pasting the effects to all clips on your timeline. Feel free to comment with feedback or any suggestions/ideas you might have. 

Sunday, 27 October 2013

DSLR movie making tips

More and more people are now using DSLR cameras to shoot their movies on. However, for the serious filmmaker you need to know how to get the best quality footage off your DSLR. That means ignoring automatic mode and getting used to all the manual controls for aperture, ISO etc. Most of the tips in this article are common knowledge but hopefully it'll be useful for some people. 

Start by setting your DSLR (A Canon 600d in my case) to automatic mode. Simply press the menu button while in movie mode and it's the first option "Movie exposure". Set this to Manual and you're done. At the bottom of this menu, there's something called "Highlight tone priority". Disable this then go to the next page in the menu. Set the Movie rec. size to 1920x1080 and if you're camera is set to PAL you can choose to shoot in either 24fps or 25fps. Personally, I shoot all my footage at 25 frames per second.

Next up is exposure. You can check for correct exposure by hitting the Av +/- button and a meter will pop up. Press the * button and a little tab will appear on the meter and you need to get this tab in the middle between the 1s for correct exposure. You can adjust exposure through the ISO, aperture and shutter controls. The dial on the top of the camera controls the shutter. Ideally, you should leave this set to 50 but in certain situations you might want a fast shutter so you can capture fast motion with more detail. Slow shutter = more motion blur. Fast shutter = less motion blur. 

Holding down the Av +/- button while moving the dial will adjust the aperture. A wide aperture (such as 1.8) will give you very shallow depth of field which will make it harder to focus but you get a very cinematic blurred background so your subject stands out more. A tighter aperture will provide a greater depth of field meaning more of the scene will be in focus. A tight aperture will make it easier to focus but it will require more light in the scene. You need to decide what's important for a particular shot(depth of field, motion blur etc) so plan beforehand.

The last setting which controls exposure is ISO. Press the ISO button and make sure it's not set to AUTO. The ISO on a DSLR is similar to the gain on a video camera. With a high ISO you get more exposure but it also introduces more visual noise on your footage. You shouldn't rely on high ISOs as an alternative to lighting your scene properly. On the preview LCD screen, your footage might look okay but when you play it back at full resolution on your PC, you'll see a lot of noise and this doesn't look very professional. It's generally recommended to set the ISO to a multiple of 160. On the Canon 600 however the ISO options are 100, 200, 400, 800, 1600, 3200, 6400. Personally, I wouldn't go higher than 400 and 800 would be my absolute maximum. However, for outdoor night shots you might have to bump the ISO up to 1600 and beyond. If you're shooting indoors, always light your scene properly.

Focus is something that you have to get used to when using a DSLR. On most DSLRs, autofocus is useless on video mode during recording. Set your lens to MF for manual focus. You can then twist the lens and focus on certain parts of the scene. There's also a focus check button on the back of the camera represented by a magnifying glass and + icon. You press this once to expand the frame by x5 and then again for x10. Pressing it for a third time will take you back to normal view. This is very useful as you can "zoom" in to part of the scene and get a nice sharp focus. 

Last of all, you may want to invest in some accessories to make your DSLR more practical for video work. Get a decent tripod with a quick release plate so you can quickly go from static to handheld. The Konig Kn-tripod is a decent affordable tripod which I recommend. For handheld camera work, look into buying a shoulder rig so you can get steady shots. Finally, the standard kit lens isn't that good so buy some prime lenses. The Canon 1.8 50mm lens is a good quality and affordable prime lens. Most beginners buy this lens before investing in more expensive lenses. If you're serious about film making, be prepared to spend hundreds of pounds (or dollars) on lenses.