The lens is compact and light with a filter size of 52mm. The size of 40mm f2.8 lens is about 62mm*76mm, and the weight is around 371g.
1:1 magnification, with high resolution and dreamy bokeh, it is well-suited for shooting close-up, still life and portraiture.

Usually a fisheye lens is always matched with bright F/2.8 maximum aperture, but we do our best to finally develop the first fisheye lens with larger aperture F2, which supports working in difficult lighting conditions with greater light intake, especially shooting the starry sky.

Mixing a comfortable wide-angle design with an ultra-fast maximum aperture, the 17mm f/1.4 lens is designed for use with APS-C-format mirrorless cameras and provides a 25mm equivalent focal length. The optical structure of this lens is 9 elements in 8 groups and the angle of view is 81° .
Characterized by its bright f/1.4 maximum aperture, this lens is adept at working in low-light conditions and also affords increased control over depth of field for selective focus control. 
It's a fast and portable lens well-suited to landscape, nature, and street photography.

From Petapixel
By JARON SCHNEIDER
2020.12.10

From Photolari
By Iker Morán
2020.10.27

From DPReview
By BASTIANK
2020.10.19