After using Zeiss Otus, it will be very hard for you to consider using other lenses even Zeiss. The best in quality you can get. However, weight sometimes can be an issues and I am glad that I have found my solutions: The light weight and autofocus Zeiss Batis series of lenses. Not being a fan of 35mm and 85m focal length, I collected the Batis 18/2.8 Distagon, 25/2 Distagon, 40/2 CF Distagon, and 135/2.8 Apo Sonnar. All of them are of very good quality, able to autofocus on Sony A7, and best they are not very heavy to carry around. Some people will complaint that the Batis are too big in size but that is not an issue for me. 40/2 is close to 35mm, but I still consider this one because it can be used as the only lens if I were to go out with just one lens (my ZM 35/2 can also do the job but it is manual focus and no EXIF data). Also the 40/2 CF has close focusing capability probably around 1:3 so a good candidate for occasional macro use.
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Rolleiflex 3003, SL2000F - SONY Alpha7R 1/2/4. A1
Carl Zeiss C/Y T* - QBM HFT - ZM T* - ZF T* - Batis T* - Otus T* - Loxia T*
Sony. Zeiss 16-35/4 T* G200600 GM100400 GM600
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