|
|
Answers to your most frequently asked questions
Or at least, the ones we remember you asking
How do you aim the camera?
We stay firmly on the ground at all times and only the camera pack is lifted aloft. ![]()
Does the camera work automatically?
In some ways, yes. The focus is automatic, as is the frame advance. However, in order to ensure the highest possible
quality images we usually choose to set the aperture and shutter speed manually, related to the quality of light
and the colour and contrast range of the subject
Do you use zoom lenses?
Normally, no. Fixed focal length lenses are generally of much higher quality. Our photos are often enlarged to
30 or more inches wide (1 metre) from 35mm film and this level of performance is simply not available with most zoom lenses. Zoom lenses also have smaller maximum apertures and need to be stopped down a few stops to sharpen up the quality. They're cheap for a reason. ![]()
Do you use digital cameras?
No. Although digital cameras are improving every year they still offer very poor quality compared to conventional
silver-based photography and are a very long way indeed from being a universal professional choice. It's always important
to use the right tool for the job and in our case, digital just isn't up to the mark.
What if your target is surrounded by trees, or is next to a river?
No problem. We regularly work from in among buildings and trees, as well as over lakes and rivers. Even, on more than one occasion,
from a boat. As you can see from some of our sample photos, hanging the camera system over a river, loch or the open sea is not
a problem. ![]()
How does a hot air balloon work?
A hot air balloon is just a big fabric bag in a neat shape. The applied heat makes the air (gas) inside expand and this forces out some of the air. This leaves us with a
container of hot and thinner air. The balloon now has buoyancy in comparison to the colder - heavier, denser - air around
it and it therefore has lift.
How do you know if the balloon is at the right temperature?
There are three digital thermometer sensors built into various parts of the balloon and we can read the digital outputs from down on the ground. ![]()
How high can you go?
Legally, under normal circumstances, 200 feet is the maximum - actually 197 feet or 60 metres. With permission in advance
from air traffic control our equipment lets us go as high as 400 feet - 120 metres - with the balloon and 800 feet - 240 metres - with the kite, currently. A hot air balloon is not very "green", is it?
Which takes less energy? Keeping a four ton helicopter in the air for an hour or so, or keeping a seven pound - 3.2 kilos - camera unit in the air for twenty minutes? It's not hard to see which burns less fuel, is it?
For more information please read our Environmental Information page.
Any other questions?
Please use the email link and we'll be happy to try to answer them for you but bear in mind that many of our systems
and designs are confidential. All the photographs, logos, graphics and text on this website are Copyright © 197 aerial photography and all Moral Rights are asserted. Click here if you need to ask 197 aerial photography about copyright licences or if you wish to ask for a price to use any of our images on a website or in other media. Information about copyright and image usage can be found by clicking this line. All sales and copyright licences are as per our Terms of Trading, available on request in print, via the web or by email. - - - End of page - - - |