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Oxford School of Photography
insights into photography
Monthly Archives: July 2014
Going, going . . .
July 30, 2014
Posted by on Alex Ramsay Photography, news and blog
It’s not every day you see the equivalent of a cathedral being flattened, so when I found myself an hour’s drive from Didcot last Saturday evening, I was immediately on my way. Three of the famous cooling towers were due to go the following morning. Like many people I’ve always considered them beautiful structures – that lovely sexy curve at their waists! – that enhance the landscapes in which they are set. They can quite legitimately be compared with cathedrals; their architect, Frederick Gibberd, was also responsible for Liverpool Metropolitan Cathedral (Paddy’s Wigwam to the irreverent).
I reached Didcot after sunset, and eventually found a position on a railway bridge with a fine view, about a quarter of a mile away. The towers could still be seen in the last of the light.
I later learned how appropriate this spot was. The bridge was where nervous spectators had gathered in…
View original post 328 more words
Architecture Photography: A Quick Guide to Shooting Building Exteriors
July 26, 2014
Posted by on Following on from this post about The Taj Mahal this article is well presented with lots of ideas and techniques and considerations of what lenses you should use to achieve a special view.
Crop Factor Explained: How Sensor Size Affects the Field of View
July 25, 2014
Posted by on From Lightstalking
These days, we often hear about the benefits of full frame cameras over APS-C, we are told about four thirds sensors and micro four thirds sensors but what does all this mean to us in relation to the way we take pictures? For this article, we are going to leave aside the differences in image quality such as noise and dynamic range because for most enthusiast photographers the difference is very minimal whatever the sensor.
The biggest difference is in what we call the crop factor of the sensor and to begin to understand that we are going to go back in time a little to the days of film.
For many of us that own or have owned a 35mm SLR film camera, the focal length of a lens seems pretty obvious. Focal lengths less than 35mm are wide angled, from 35-70 is considered a standard lens, as it is roughly similar to our own field of view and from 70mm upwards we are into the the telephoto ranges. The thing to keep in mind is that these are what we perceived to the fields of view on a 35mm camera.
The biggest myth to dispel when we come to digital sensors of less than full frame is that the crop factor magnifies the image. This is not true and perhaps the best way to explain it with the use of an image taken on a full frame camera.
Full Frame and APS-C Sensors: A Comparison
Let’s assume we have taken our shot on a 24mm lens on our full frame camera. We are now going to take exactly the same shot, with the same 24mm lens on an APS-C sensor camera. Most APS-C sensors have what is known as a 1.5X crop factor, and indeed when you take that same picture, it would appear that the image is indeed magnified, i.e. captured at a focal length of 24 x 1.5 = 36mm. However what we are going to do now is take our full frame image and crop into so that we get the same size as the output of an APS-C sensor. Now if you compare the cropped image to that of the the photo from the APS-C sensor, you will see that they are identical. The magnification is exactly the same but the image has a narrower field of view, in other words, compared to full frame, it is cropped.
APS-C is just Full Frame cropped by Jason Row Photography, on Flickr
So with this in mind, how does this relate to us in real life photography. Well let’s take a look at the most common forms of cameras that we enthusiasts use. Go here for the rest of this excellent article
The Taj Mahal: 26 Images from Traditional to Unique
July 24, 2014
Posted by on If you have ever had the opportunity to visit The Taj Mahal you will know that everywhere you point a camera there are pictures you want to take, and at the same time every picture you see has already been photographed by someone else. This can be frustrating, trying to find something new from one of the most photographed buildings in the world. But then you shoot anyway because whatever you capture is yours. Interestingly the towers on the corners are built leaning but look straight from a distance, at least that was what I was told by a guide, then again he could have been having a laugh at my ignorance. These pictures are not groundbreaking but are a good selection of what can be achieved from the obvious to the inventive. From those nice people at Light Stalking What these pictures prove is that a photographer requires patience and planning. Planning to be at the location when the light is just perfect and patience to wait.
Travel photography always acts as a great push for me, that saying “a photographer needs to see as a child or as a tourist….for the first time” is always easier in another country. Last year I went to Syria and here are some of my pictures, you may be interested, this year I am off to Libya to see Leptis Magna. If you doubt my reasons for Libya have a look at the pictures
Land of the giants: the world’s largest lenses
July 19, 2014
Posted by on Just how deep is your pocket? These lenses cost more than some people’s houses.
Sigma 200-500mm f2.8 APO EX DG Telephoto Zoom
Weighing in at a hefty 34.6lbs and 726mm in length, this is not the easiest lens to carry around with you on holiday. As well as being meaty, the Sigma 200-500mm also wins some world firsts; it is the first large-aperture ultra telephoto lens to have an f/2.8 aperture at 500mm, and is the largest high-speed zoom lens available.
If you’re impressed by this and are looking for a lens that is excellent at tracking fast moving objects and you don’t mind parting with $32,000, this could be the lens for you!
Canon EF 1200mm f/5.6 L USM Lens
At just a little heavier than the Sigma 200-500, the Canon EF 1200mm weighs in at 36.4lbs and also holds some records that are not to be sniffed at. This is the longest full auto focus lens in the world and is the world’s most powerful super telephoto zoom according to Canon. The lens is fully compatible with any EOS SLR and boasts silent auto focus thanks to its Ultrasonic Motor.
According to The Digital Picture, when the lens first came out it had an annual production volume of just two lenses due to the fact that it takes nearly a year to grow the fluorite crystals needed for the lens.
Unfortunately the Canon EF 1200mm is no longer in production. It is rumoured that there are anything from 20 to 100 of these lenses around today. Do you think you might want one? B&H have their hands on one. Just make sure you’re prepared to fork out around $120,000 for it!