We take one picture for each aperture of the lens using full-stop increments.To compute the transmission score, we measure the T-stop at the largest possible aperture iat each focal length. DxO Labs designed the target and produced it using a high-resolution printer to achieve sharp transitions between black and white areas without We use these results to generate the DxOMark resolution score. It’s also worth pointing out that wide-angle lenses typically have more distortion than longer lenses.The photometric aperture, also known as “T-stop” (T = transmission), is the aperture of the lens corrected for its transmission loss (see light transmission definition). The DxOMark Lens Score corresponds to an average of the optimal quantity of information that the camera can capture for each focal length.The quantity of information is calculated for each focal length/aperture combination and the highest values for each focal length are weighted to compute the score. With DXOMARK you can display the lenses with three different views - Grid, List or Graph in order for you to have the best solution to compare the filtered results. To measure light transmission, we take a picture of a uniformly illuminated (+/-1%) opalescent transmission target.We place the camera at a distance equal to 40 times the focal length of the lens (for example 2 meters for a 50mm lens). The Sony scored an excellent 99 points securing a top-ten position in our Sensor ranking. A value of 0.2% would indicate noticeable distortion. Zoom lenses tend to have negative (barrel) distortion for short focal lengths, and positive (pincushion) distortion for longer focal lengths. This results in a number for each focal length / aperture combination. These values are then averaged across all focal lengths to obtain the DxOMark resolution score that is reported in P-We take a picture at each focal length and aperture. DXOMARK's comprehensive camera lens test result database allows you to browse and select lenses for comparison based on their characteristics, brand, price, lens type, lens size, focal range and aperture. For our DxOMark lens reviews, we evaluate the performance of interchangeable lenses for cameras equipped with sensors that can capture images in For our testing, we mount lenses on cameras and measure them for the following criteria:We use the sub-scores for the criteria above to compute the final DxOMark lens score.
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