Canon 7D camera measuring resolution method sharing

To the photographic enthusiasts to share a detailed analysis of the Canon 7D camera test resolution method.

Method Sharing:

Resolution "is an indication of how far the tiny subject can be photographed. Basically, and the number of pixels, but the model is different, the ability to reproduce the details are different. Here to verify the extent to which the EOS 7D affects the details and the difference in number of pixels.

Test method

Use special plates that can detect more than 30 million pixels of resolution. The plate is composed of 14-level size and 8-directional stripes, and has a 3-level contrast, which can be used to verify the distinguishable boundaries and whether there are pseudo color, pseudo-image and so on. Use Lenses for EF 50mm f/2.5 small macro. Manual exposure (F11), photo style is standard, and the use of large flash studios dedicated lighting uniformity.

A, the normal example:

Vertical and horizontal line imaging is very clear, there is no unnatural bias.

B, pseudo-color examples:

There is no red or purple between the lines.

C. Examples of pseudo-image analysis:

The line image of the vertical and horizontal is not correct and becomes a different texture.

Points for attention when testing

It is important to eliminate the uncertainty of focus accuracy, lens performance, and hand jitter during shooting to determine the performance of the camera, focusing on presenting the original characteristics of the camera. The datum is measured by a standard plate larger than 1.4 times times the pixel spacing of the image sensor.

Chart comparison

Take a special chart and analyze its overall expressiveness and resolution of each pixel.

RAW

To about 18 million pixel standard of 1.3 and a smaller level of 1.2, all directions did not occur sharp edges, the smaller 1.1 also identified half. The delicate and dense imaging is excellent, and there are few pseudo images and pseudo colors in the vicinity of the resolution boundaries.

Jpeg

Sharp edges occur on the high contrast contour, but can be distinguished in all directions up to 1.2, which is the same as raw. About 18 million of high pixels bring a soft but not-imaginary imaging trait.

A rich amount of information, proportional to the number of pixels, eliminates the fear of the smallest pixel.

Looking back at the evolution of the previous EOS series Digital SLR camera, it will be known that increasing the number of pixels in order to perform a large print confidently should start with about 12 million pixels. At this point, you already have the ability to print with A3 dimensions and have no problem with the imaging performance.

So what exactly does the 18 million pixel of the EOS 7D bring? The ability to do so is clearly demonstrated in the above tests. From the standard board test can also be at a glance, its imaging performance has surpassed the Bayer (Bayer) format image sensor Datum "pixel spacing x1.4 times (1.4)". This high pixel performance and delicate raw image is attractive.

If the output size is limited, high resolution to a certain stage may lose meaning, but it will still be the texture of the performance and detail of the three-dimensional reproduction of a great contribution. The image of the 6x7 or even the 4x5 large format may not be far off, and it is really expected. These can also be confirmed from the partial real-shot illustrations.

When the actual printing, the size exceeds A3, you can see the details of the imaging quality gap. Just in this case, to pursue the best sense of rigor, you need to use raw photography and DPP imaging. It is noteworthy that "noise reduction" must be set to "0" when imaging. In this way, you will be able to obtain a different level of the JPEG and the sense of rigor.

Well, the above information is a small series of photography enthusiasts brought to the detailed Canon 7D camera measurement resolution of the method to share all the content, you see the photography enthusiasts here, small series believe that you now that is very clear assessment of the method of it, Then the friends will be quick to follow the small series on the way to test the Canon 7D camera resolution.