Olympus 2.0x and 1.7x Tele-converter Patents surfaced over the web, till now not 1.7X Tele-converter from Olympus exist and the 2.0X EC Tele-converter is old and need a update.
As you can see the B&H store have only Olympus EC-20 2.0X Teleconverter works with Olympus E & Four-Thirds Lenses.
Self-interpretation
- Patent Publication No. 2016-177042
- Published 2016.10.6
- Filing date 2015.3.19
- Example 1
- f 249.93
- FNO. 4.95
- 2ω 5.03 °
- IH 10.82
- β 1.70
- BF (in the air) 15.76
- Total length (in air) 200.72
- Example 2
- f 294.03
- FNO. 5.76
- 2ω 4.27 °
- IH 10.82
- β 2.00
- BF (in the air) 25.16
- Total length (in air) 208.57
- The master lens
- f 147.00
- FNO. 2.88
- 2ω 8.30 °
- IH 10.82
- BF (in the air) 29.50
- Total length (in air) 179.90
source – egami.blog.so-net.ne.jp
