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The 400mm f / 4 DO IS II USM, which replaced an earlier version of the same lens in 2014, [3] is one of only two Canon lenses that make use of diffractive optics (the other is the EF 70–300mm f/4.5–5.6 DO IS USM). The use of diffractive optics allows the lens to be significantly lighter than it might otherwise be.
E-units could be purchased with or without cabs; units with a cab are called A units or lead units, while cabless units are called B units or booster units. B units did contain hostler controls, but they could not be so controlled on the main line. The locomotive units were linked together with cables which enabled the crew in the lead unit to ...
A larder is a cool area for storing food prior to use. Originally, it was where raw meat was larded—covered in fat—to be preserved. [ 2 ] By the 18th century, the term had expanded: at that point, a dry larder was where bread, pastry, milk, butter, or cooked meats were stored. [ 2 ]