Pentax has a tradition of producing particularly small prime lenses, and its ‘Limited’ range of digital-only DA models are exceptional even by the company’s own standards. The DA 40mm f2.8 Limited lens, announced in December 2004, measures just 15mm thick, justifiably earning its nickname of a ‘pancake’ lens. Mount this on a Pentax DSLR and you’ll have a seriously small and light combination offering a near-standard equivalent focal length of 60mm.
The latest model in the Limited range is the DA 70mm f2.4, announced in September 2006. With an equivalent focal length of 105mm when mounted on a Pentax DSLR, the DA 70mm offers short telephoto capabilities that are ideal for portraiture and cropped landscape shots. While not quite as slim as the DA 40mm model, the DA 70mm is still extremely compact at a mere 26mm thick. It’s pictured here with its supplied lens hood attached. Read the whole article here