Welch, added that another consideration was the relatively greater survivability of satellites and the vulnerability of the Blackbird to Soviet SAM-5 missiles.
Boasting second-generation styling, this new lens succeeds the popular DT 18-55mm F3.5-5.6 SAM that was introduced in 2011.
ENGADGET: Sony NEX-3N and Alpha A58 unveiled, heading to Europe this spring
The DT 18-55mm F3.5-5.6 SAM II is a light, compact 3x zoom that's an ideal partner for A-mount cameras with APS-C sensors.
ENGADGET: Sony NEX-3N and Alpha A58 unveiled, heading to Europe this spring
In the men's event, eighth-seeded Sam Querrey upset top seed and fellow American Andy Roddick 7-5 3-6 6-1 to book reach the semifinals.
Elsewhere, home favourite Sam Stosur crashed out after throwing away a 5-2 lead in the final set before losing 6-4 1-6 7-5 to China's Zheng Jie .
"I have great respect for the captaincy of Sam Torrance in 2002, " the 42-year-old told BBC Radio 5 Live's Sportsweek.
Peter Gough and Chris Jones both scored 66 and Sam Dewhurst made 44 as OV's reached 268-7 as Simon Parker took 5-46.
American Sam Querrey booked his place in the last four following a straight sets 6-3 7-5 win over Xavier Malisse.
Australian second seed Sam Stosur joined Serena in the third round after defeating American wildcard Jamie Hampton 6-0 7-5.
The shocks did not stop there as home hope and seventh seed Sam Stosur was beaten in the night match by Swede Sofia Arvidsson, going down 7-6 7-5.
Sam Spector, a stylist who is 5 feet 5 inches and works with celebrity clients including noted short-guy actor Daniel Radcliffe, said that his trick is going to department stores at the beginning of the season when they still carry one of each size.
The victory was be sweet revenge for Blackburn, who lost 5-0 at Stamford Bridge in the Premier League, and a real tonic for manager Sam Allardyce as he recovers from heart surgery.
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