Both our experts rely on Pentax DSLR cameras and for good reason. They utilise a wide number of features and functions as well depending on the weather-sealing and durable design. For Ogun and Mike, it is important to be able to use the camera to survey the scene quickly and efficiently.
The beauty of DSLR photography is seeing the light directly from the subject through the optical viewfinder. This offers a huge advantage, especially out in the field. It is not only the composition of the individual elements, but also assessing light that's available when taking the shot.
Along with the camera, the focal length of the lens is crucial for successful shots. When we talk about focal length, the size of the camera’s sensor is an important factor.
You'll find that the lens name always includes the focal length, which refers to the angle of view in relation to a 35mm full-frame sensor. An APS-c sensor is smaller so doesn't include the the outside area of the image that a full frame sensor would capture. Comparing them side by side the APS-C image would appear cropped - and that's why it's called a crop sensor.
Choosing a lens for a full frame camera is easy because the focal lengths correspond directly to the sensor. However when choosing a lens for an APS-C camera you have to consider the crop factor, and these are calculated by multiplying the focal length by the crop factor, which for PENTAX is 1.5x.
So for example, to calculate the focal the focal length for a 300mm lens, the calculation would be: 300mm x 1.5 = 450mm.
So when using a 300mm lens on an APS-C camera, it would be the equivalent to using a 450mm lens on a full frame camera.
Here's another example: 150-450mm x 1.5 = 225-675mm
This is a key consideration for wildlife photographers when choosing their camera equipment.