Archive for the ‘General knowledge’ Category

White balance for atmosphere – Dubai friends

Sunday, September 14th, 2008

Recognise the importance of colour • Use ambient colour casts to demonstrate atmosphere • communicate emotions to your viewers

Daylight white balance setting brings out the atmosphere in this street scene from Dubai, by Damien DemolderWhat we see and what the camera sees is not always the same thing. Our eyes adjust indoors to the yellow warmth of domestic light bulbs, so we hardly notice they’re light is not daylight, but film can only record what is there. Thus if you shoot with film indoors at night you get very yellow pictures.

Digital cameras have a way of compensating for the colour of different light sources, so you can take the yellow out of the tungsten bulbs in your dinning room, and the green out of the fluorescent strips under the kitchen cabinets. The light on an overcast day can have some warmth applied to compensate for its blue-ness, and there is even a custom setting that can be used to deal with the oddest coloured light you could come across.

White balance control is a brilliant thing, especially the custom setting, and is, I’d say, one of the best features digital photography has given us. Being able to record colours accurately under different light sources is a dream for professionals and amateurs alike.

There are times, though, when the colour of the light provides atmosphere, and we should not forget how important this is to us. We turn the lights down low, or light candles, to create a romantic atmosphere at home because we like the warmth of this kind of light. The blue haze of a cold day lets us know it’s cold before we’ve even gone outside, so removing the cast with white balance settings can actually produce a false idea of what the day was like.

In the shot shown here I wanted to keep all the colours of the street in the picture, as they are half of the attraction. In any case, no single setting could have compensated for such a wide range of light sources. I set the camera to the daylight setting – the one I use almost all the time – and let the colours live.

Street scene from Dubai, shot with the tungsten white balance setting. Much of the atmosphere has been lost. By Damien DemolderIn the second example you can see what the shot would have looked like had I used the tungsten setting. The composition is still there, and there are hints of the warmth of the light, but the blues and greens have cooled the atmosphere too much, and I can’t feel the heat of the Dubai night any more.

Colours play a massive part in our life – we all have strong reactions to colours and we associate meanings to all of them. Would you drive a pink car, wear a bright blue shirt to a funeral or feel cosy in a fluorescent green room? Appreciate how much of a part colour plays in our responses and our emotions, and use it in your photography. Don’t automatically kill colour casts from artificial light, or that which is created by certain weather conditions unless colour accuracy is important to what you are trying to do. When atmosphere is important use those colours, so those who look at your pictures have double the chance of understanding what it was like to be there.

Nikon D80, 18-70mm f/3.5-4.5 set at about 70mm.
ISO 3200 1/20sec @ f/4.5

To see more of my pictures visit my galleries at www.damiendemolder.com

To see more of my pictures
visit my photo galleries site
at www.damiendemolder.com


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Daylight white balance setting brings out the atmosphere in this street scene from Dubai, by Damien Demolder

Daylight white balance

Street scene from Dubai, shot with the tungsten white balance setting. Much of the atmosphere has been lost. By Damien Demolder

Tungsten white balance

Patterns and shapes – Muzeum Techniki

Monday, June 30th, 2008

muzeum-techniki - damien demolderThis ship’s propeller really caught my eye as I walked around in Warsaw, Poland, as its curved form is surrounded by a mass of squares and triangles.

Much of Warsaw’s non-modern architecture is based on right angles and straight edged shapes with few curves or circles. Although I suppose I hadn’t really made a mental note of that fact, when I came across this object, that has no straight edges at all, I was quite struck with it. In taking the picture I wanted to get over the contrast between the roundness of the propeller and the sharp edges of the notice board next to it, plus the visually powerful squares of the walls behind it. It was only when I looked through the camera that I noticed the blocks of the car park and the lines painted on the floor. These were something of a visual bonus.

At the time I had a wideangle lens on the camera and this is what I made the first pictures on. Viewing them on screen I realized that I wasn’t getting across the strength of the squares, as being close enough to fill the frame was creating too dramatic a perspective, which in turn distracted from what I really wanted to show. Instead I fitted a more standard lens (in this case a 28mm on the APS-C camera). This meant I had to move further away, which helped me to include more of the ground and those lines, plus it flattened the perspective. Moving away also meant I would have to worry less about the lens distorting the brickwork into curves rather than those strong straight lines.

Keeping the camera absolutely level was essential for the graphic and purposeful image I wanted to create, and keeping a wide aperture would allow the propeller and the notice board to stand out from the background, while still retaining enough focus in the brickwork that the shapes could easily be seen. I didn’t have a tripod with me at the time, but I wished that I had. Although the shutter speed was short enough to hand-hold the camera without fear of camera shake, mounting on a tripod makes getting everything right-up and level so much easier. In the end I took about six pictures before I was satisfied that I’d got what I needed.

Fortunately the day was overcast, so the reduced contrast of the softer light allowed me to show the three dimensional shape of the propeller without burnt highlights or overly dark shadows. The soft contrast also helped to display all the fine detail in the stonework, the notice board and the car park.
Originally shot in colour, I converted the picture to black and white via a channels conversion, using a combination of green and red channels. The green channel gave me fine detail, while the influence of the red channel boosted the contrast of the scene a little.

I didn’t have to do too much else to the image, other than some minor curves adjustments and then some unsharp mask to finish. The exposure was already quite dark, which I think adds to the atmosphere. The place the picture was taken is quite hash and serious, so making a jolly picture would not have been appropriate.

Pentax K10D with 50mm manual focus lens, 1/80sec @ f/2 and ISO 400

To see more of my pictures visit my galleries at www.damiendemolder.com

To see more of my pictures
visit my photo galleries site
at www.damiendemolder.com


muzeum-techniki - damien demolder

Converging verticals – what, how and fixes

Tuesday, May 27th, 2008

Converging Verticals Eiffel Tower with guide linesWhen we look up at a tall building its sides slope inwards to form an inverted V shape. We are so used to seeing in this way that we hardly notice the effect while we are enjoying the view. When we take in the same scene in 2 dimensions, as we do when looking at a photograph, the experience is quite different and we do notice the convergence of the vertical aspects of the building.

If the effect is exaggerated, or at least very obvious, it lends a sense of height and drama to the picture, and we can appreciate a a split second just how tall that building is. However, if the effect is only moderate the building might look as though it is tilting backwards and in danger of falling over.

As with many photographic visual effects moderate applications simply look like mistakes, so we should avoid them at the shooting stage, or learn to correct them afterwards.

The way to avoid the problem is to hold the camera completely level when taking the picture, as it is the looking up angle of the camera that creates the effect. Unfortunately, keeping the camera level usually means that the top of the subject will be cut off. You can move backwards to alter your perspective, but in the majority of cases this is not an option as space is usually limited in architectural locations. In any case you’d have to move a long way for even a moderately tall structure

To see more of my pictures visit my galleries at www.damiendemolder.com

To see more of my pictures
visit my photo galleries site
at www.damiendemolder.com


See a map of where this picture was taken

Converging Verticals Eiffel Tower