PMA 2010: Lens maker Tokina is set to produce a 16-28mm F2.8 ultra wide angle zoom lens for full-frame DSLRs. The lens, called the SD 16-28 F2.8 (IF) FX is being shown in mockup form on the stand of US distributor THK at the PMA show in Anaheim, California. Specifications and availability are as yet unknown.