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Motion blur   This blog will introduce what I have learned about the knowledge of motion blur in photography. Motion blur is the apparent streaking of moving objects in a photograph or a sequence of frames, such as a film or animation. It results when the image being recorded changes during the recording of a single exposure, due to rapid movement or long exposure.    When a camera creates an image, that image does not represent a single instant of time. Because of technological constraints or artistic requirements, the image may represent the scene over a period of time. Most often this exposure time is brief enough that the image captured by the camera appears to capture an instantaneous moment, but this is not always so, and a fast moving object or a longer exposure time may result in blurring artifacts which make this apparent. 1   In the two images, we can see the impact of using motion blur, the objects have become vague, this can show the beauty...

  My presentation is on week 9, the title of the presentation is "Ubiqutous photography and web 3.0 services", the artist I have looked for is Penelope Umbrico, here is some information I will talk in the presentation. Penelope Umbrico is not a photographer but an artist who using images to make artworks. And she is good at using images, she is best known appropriating images which are found from the searching engines and picture sharing websites.   There may be a question that why she is related to the web 3.0 services, to this question, I have found some features on web 3.0 services, web 3.0 has main five features, semantic web; artificial intelligennce; 3D graphics; connectivity and ubiquity, these features make people's resources connected together online, for example, on YouTube or Instagram, you can find thousands of photos on various topics, for Umbrico, she can download these photos and make them into a new photo, and she like using images which she finds in th...

Depth of field   This blog I want to talk about what I have learned on the knowledge of depth of field which also called "DOF" in photography. Depth of field is the distance betwwen the closest and farthest objects in a photo that appears acceptly sharp, and there is narrow and large depth of field.   In the picture, we can understand the narrow and large DOF clearly, in the photograph with a narrow DOF, only a small slice of the image is in focus. Conversely,with a large DOF,  much more of the scene is sharp. Many DSLR's have a depth of field preview button, live view can be ues to check how the depth of field will look, and if you press the   button while tou look through the viewfinder, the camera will stop down the lens, and you will see the actual image will look.   In my opnion, it is important to decide whemn you need a small DOF and how to create it , and to archive a shallower DOF, t o achieve a shallower DoF you can either move c...