Technical Know How
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Camera Batteries & Battery Care
May 19th
Allcam/eStudy camera courses and film making tips and tricks. The technical aspects of film and television.
For proper shoot planning you must know how long your batteries last! The battery capacity of the same battery can change dramatically, depending on age, charge/discharge cycles and even ambient temperature. Read on, if you want to know how do we get the most out of your batteries?
How do they work?
The popular Info Li-ion batteries contain a small computer circuitry, which watches the state of the battery and communicates it to the camera, which displays the remaining battery power in minutes.

Original or generic batteries?
This can be critical for an accurate ‘battery remaining time’ display. It is not so much the capacity of the battery as it is the display. What I mean, a generic battery displays i.e. 5min remaining power or is flashing battery and the camera can run for another 30min?!
In the worst case scenario the camera doesn’t recognise the battery at all.
How to take care of batteries
Run batteries fully flat before recharging. Have two or more batteries and rotate them regularly. If batteries behave odd or won’t last very long, repeat a discharge and charge procedure multiple times. Even though modern batteries supposedly don’t develop a memory, I did resurrect some batteries with this procedure.
Tips for prolonging your battery power
1. Use Your Viewfinder Instead of the LCD Screen
Through the flip-out, LCD (Liquid Crystal Display) screen, you do get the best visual representation of what your video will actually look like, but if you want more battery power, keep the LCD shut. You will have an energy saving between 10% -20% depending on the type of camera and screen.
2. Buy Large and Extra Batteries
When you buy your camera, it usually comes with a ’starter’ battery pack, that will last about an hour. You can use these ’starter’ packs for as long as you own the camera, however it is a good investment to upgrade to a larger battery as soon as you can.
Even though they can be expensive, you will thank me the next time you shoot your ultimate video and do not run out of battery power. You can keep the ’starter’ battery pack as a reserve, knowing you can tape for another hour.
Summary
Apply the procedures described above to all rechargeable batteries in your household, to get the most lifetime and maximum capacity from your batteries. To get the best performance and lifetime out of your camera or camcorder, visit me on www.estudy.net.au for our video ‘DIY camera care and protection’ or check out my free articles and videos on this subject.
DSLR Video – Camera courses and film making tips
May 18th
Allcam/eStudy camera courses and film making tips and tricks. The technical aspects of film and television.
DSLR Video – Turning a setback into a superior feature!
(With the help of a little pocket device)
DSLR’s employ excellent interchangeable optics and larger image sensors, which results in superior picture quality. A larger sensor doesn’t provide any higher resolution, rather it allows for narrower depth of field by controlling the aperture and focal length of the lens. The narrow DOF allows the videographer to isolate a subject from the scene and therefore give the scene a more “filmic” look.
Now with HD recording, video images are in the same ballpark of professional video cameras.
Even the recording media (flash memory) is often the same with both camera types. Video compression and output is often the same, AVCHD codec, which allows you to use the same video editing platform.


What is holding you back?
Of course, camcorders and photo cameras are purpose built. The camcorder has features that the still camera hasn’t and vice versa. For starters, DSLR’s lacking a power zoom, LCD viewfinder and exposure aids like peaking and zebra you find with professional camcorders. Last but not least there are no adjustments to the resolution and frame rate, which is important when you have to match and mix your footage.
In this article I will address only one setback of a still camera, when it comes to video filming, the sound or audio. Often DSLR’s are equipped with simple monophonic microphones, which don’t allow any electronic adjustments whatsoever. So if you can’t connect an external microphone, you end up often with a pretty poor sound track on your production.
The Solution is an independent high quality and extremely versatile audio recorder. If applied properly, the results can be as good as using a wireless microphone in a camcorder setup for a fraction of the price. The featured audio recorder is so small and versatile, that it can be positioned close to the action. With just centimetres or a few meters away for interviews or stage performances, you bring your audio in the final production to a whole new level.
Caution!
The audio recorder needs to be synched with the camera and/or cut and shift the audio timeline to the appropriate video clip.
The Bonus!
This is a real beauty. While you are on location, you may as well take advantage of your DSLR and take some nice still shots of the scenery, objects and people. Add these pictures into your production, if you want to emphasise a point or make a statement.
How do we put it together?
Now here comes the real advantage of the setup. Let’s start with the part you perhaps thought of already:
- First you open our favourite video editing program and import the pictures and video from the camera and add the relatively poor sound track from the camera onto one of the audio tracks.
- The stereo sound of the audio recorder goes onto the other tracks of the editing program.
- Now here is a trick, use the sound track of the camera as a reference to synchronise the audio recorder sound tracks. When you are happy with the result, you may remove the camera sound track.
- Once you have completed your fine tuning and editing, you can end up with amazing results in your overall production.
When done properly, the audio from the voice recorder gives the impression as it is recorded by the camera.
Summary
Even though the DSLR has its setbacks as a video camera, the video capabilities are nothing short of a revolution. The creative videographer will embrace them because of the new tool they provide ‘shallow depth of field’.

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