More on the Pentax 09 telephoto macro a.k.a. smc Pentax Macro 20mm f/2.8 lens
This is an update on the Pentax Q 09 telephoto macro lens story from last month:
The source is Kimio Tanaka’s blog, summarized by PentaxForums member JPT:
- He apologizes for not having followed up his posts with pictures sooner.
- Some people suggested Ricoh must have got angry with him, but nothing was said to him at all.
- The name of the lens is smc PENTAX MACRO 20mmf /2.8, and that is the inscription on the lens.
- He doesn’t know much detail about the technical specs of the lens and his comments are just from his impression of using the lens.
- It’s a 20mm lens, which works out equivalent to a 92mm macro in 35mm film equivalent terms when mounted on the Q-S1 or Q7.
- Working distance is 8cm.
- Length is 50mm; weight is 70g. It’s lighter than it looks.
- AF is fast.
- It’s normal for prototype lenses from all makers to be very good, and this lens is good as you would expect.
- The only slight weakness he has perceived is a tendency to flare a little.
And some info from Mistral75:
- The lens is a macro lens in the sense that its maximum magnification is 1:1 “in terms of 35mm format”.
- At the minimum focusing distance, which is around 14 to 15cm, Tanaka says the coverage is around 25 x 36mm. Hence the actual maximum magnification is around 1/4.6 or 0.22x.
- Ricoh is still thinking about what to do with the lens, so stay tuned for more.
Test chart, taken at F2.8 and ISO 160 can be found here.
Picture source: Twitter
Update: two new pictures of the lens published by Kimio Tanaka on Twitter:
本日のブログ。試作品のTELEPHOTO MACROレンズの話、その2。レンズがここまで仕上がってるんだから「開発を一時中断」から、ぜひ「開発を再開」に向けて走り出してほしい。
PENTAX Q用の試作品マクロレンズ ━━ その2 https://t.co/huZwooYwkh pic.twitter.com/6Sxtncjkea
— 田中希美男 (@thisistanaka) May 15, 2017
One more picture taken with the lens can be found here (see also this post).