DC Watch recently has an interview with Sony G Master lens developers. It is confirmed that they are developing new GM lenses other than Sony FE 400mm f/2.8 GM OSS lens (To be released in September of 2018). Below are some info about interview with developers of Sony GM lenses:
- All current Sony GM lenses are made in Thailand except Sony FE 100-400mm f/4.5-5.6 GM OSS Lens. GM lenses made in Thailand has same quality as made in Japan.
- Sony will not release 50mm & 35mm GM lenses in these years due to Zeiss has already released their version.
- Sony will develop new GM lenses other than FE 400mm f/2.8 GM lens, they will listen to customers’ voices regarding lineup.
You can read full interview at DC watch.