Pentax discontinued following lenses:
smcp-DA 16-45/4 ED AL Dec. ‘03
smcp-DA 14/2.8 ED IF June ‘04
smcp-DA 18-55mm F3.5-5.6 AL Dec. ‘04
smcp-D FA Macro 50mm F2.8 Dec. ‘04
smcp-D FA Macro 100mm F2.8 Dec. ‘04
smcp-DA 40mm F2.8 Limited Feb. ‘05
smcp-DA 50-200mm F4.0-5.6 ED Jun. ‘05
smcp-DA 12-24mm F4.0 ED AL [IF] Nov. ‘05
smcp-DA Fish-Eye 10-17mm F3.5-4.5 ED[IF] Jan. ‘06
smcp-DA 21mm F3.2AL Limited Jul. ‘06
Source:
http://www.pentax.ca/discontinued/index.php#Lenses
DA40 要買就趁仲有貨時買