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Las siempre elegantes fotografías de Jingna Zhang

Las siempre elegantes fotografías de Jingna Zhang
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How to Make Custom Waterhouse Stops for Antique Lenses

For those who shoot with antique lenses but are missing Waterhouse stops, photographer Markus Hofstätter has put together a tutorial that shows a couple of ways that shooters can create their own. Older vintage lenses, such as Petzval ones, that don’t have an iris diaphragm instead use a set of what are called Waterhouse stops instead. Named after 19th-century astronomer and photographer John Waterhouse, the component has a set aperture that controls the entry of light into a camera in the same manner that modern-day lenses do with a built-in iris diaphragm that has blades. The difference is that Waterhouse stops are manually inserted in slots in the lens barrel.

No matter what the city does with the Queen Mary, it won t be cheap, new report says • Long Beach Post News

- ADVERTISEMENT - Those are some of the options as Long Beach weighs the longterm costs of owning a century-old steel ocean liner. And all of the plans come with a significant price tag, ranging from $105 million to retire and scrap the ship, to roughly $500 million to move the vessel and build a new dry dock, according to a report from city-hired engineering firm Moffatt & Nichol. Long Beach has owned the Queen Mary as a tourist attraction since 1967, but for years it has leased the ship to various operators that have struggled to make a profit. The latest operator filed for Chapter 11 bankruptcy in January and the city this month took control of the Queen Mary when former leaseholder, Urban Commons Queensway, walked away from the lease after the ship received no qualified bidders at bankruptcy auction.

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