Ricoh announces HD Pentax DA 15mm F4 ED AL, 21mm F3.2 AL, 35mm f/2.8 Macro, 40mm F2.8, 70mm F2.4 Limited primesPosted by Digital Photography Live Date August 28, 2013 Ricoh Imaging has introduced updated set of Pentax DA Limited primes 15mm F4, 21mm F3.2, 35mm F2.8 Macro, 40mm F2.8 and 70mm F2.4 to HD version. The ‘HD’...