The Japanese photographer Kimio Tanaka (who had previously released info on the Pentax-09 Telephoto macro lens) posted a review of the new HD Pentax-D FA★ 50mm f/1.4 SDM AW prototype lens (Google translation). Here is the recap by Mistral75:
Update:
- part 2 is now also available (Google translation)
- part 3 is now also available (Google translation)
- part 4 is now also available (Google translation)
- length: about 11 cm (a first version of the text said about 11.5 cm)
- maximum diameter: about 8 cm
- weight: about 830 g
- filter diameter: 72 mm
- diaphragm with 9 rounded blades
- minimum aperture: f/16
- no coupling cam so KAF4 mount (electromagnetically operated diaphragm)
- minimum focus distance measured on the scale: 0.4 m
- working distance to the minimum focusing distance: about 25 cm
- field coverage at the minimum focusing distance: approximately 18.5 cm x 12.5 cm (this would correspond to a maximum reproduction ratio of 0.19x)
- the lens hood supplied at the same time as the lens is referenced PH-RBB72: it includes the classic removable window for adjusting a polarizing filter
今年の春に発売予定の「リコー・HD PENTAX-D FA★50mmF1.4 SDM AW（試作品）」のファーストインプレッション。
リコーから「記事にするのはやめてくれ」とストップがかかるまで数回にわけてレポートの予定。PENTAXの新型★50mmF1.4レンズ ━━ その１ https://t.co/MPPo3iViRW pic.twitter.com/X7LvPiu94z
— 田中希美男 (@thisistanaka) January 6, 2018
