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2. Polaroid 20×24 camera - Wikipedia

   en.wikipedia.org/wiki/Polaroid_20×24_camera

   A plexiglass sheet is taped to the front of the lens, and the subject uses their reflection to help determine where they are in the frame. Because of the size of the image, acquiring an image with sufficient depth of field can be a challenge, and the lens (the camera at 20×24 Studio in New York City was fitted with a Fujinon-A 600 mm f / 11 ...

3. Picture frame - Wikipedia

   en.wikipedia.org/wiki/Picture_frame

   View of a frame-maker's workshop, oil on canvas, circa 1900 The elaborate decoration on this frame may be made by adhering molded plaster pieces to the wood base.. A picture frame is a container that borders the perimeter of a picture, and is used for the protection, display, and visual appreciation of objects and imagery such as photographs, canvas paintings, drawings and prints, posters ...

4. Picture framing glass - Wikipedia

   en.wikipedia.org/wiki/Picture_framing_glass

   Due to widespread availability and low cost, Soda Lime Glass is most commonly used for picture framing glass. Glass thicknesses typically range from 1.8 to 2.5 millimetres (0.071 to 0.098 in). Clear glass has light transmission of approximately 90%, absorption of approximately 2%, and reflection of approximately 8%. Whereas absorption can be ...

5. Timber framing - Wikipedia

   en.wikipedia.org/wiki/Timber_framing

   Timber design or wood design is a subcategory of structural engineering that focuses on the engineering of wood structures. Timber is classified by tree species (e.g., southern pine, douglas fir, etc.) and its strength is graded using numerous coefficients that correspond to the number of knots, the moisture content, the temperature, the grain ...