I could not resist buying both this lens, manufactured by Wray and inscribed "Captain Owen Wheeler's "Turtle" Lens No.1, and a book from 1910 written by Captain Owen Wheeler FRPS, titled "Modern Telephotography" and published by Ross (yes, the lens makers) in 1910. Apart from trying out the lens in due course, there is a wealth of information to be researched here as its unclear when the lens was made but sometime probably after 1910, and why by Wray when Wheeler had written for Ross? Any information regarding Captain Owen or his lens would be great.
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