Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
Thank you Fred 
Yes, the test result is only marginally acceptable，however, I will still insist on using Haida, because I prefer the operation mode of Haida to Kase, and I updated ghost comparison.
Fred Miranda wrote:
Center focus at infinity, 5500K, ACR13.3（only enable vignetting correction）
F/1.8~F/4, corner
https://live.staticflickr.com/65535/51235940328_24b4ffd6d0_o.jpghaida rear ND-01 by olalafoto, on Flickr
F/5.6~F/11, corner
https://live.staticflickr.com/65535/51235939643_4f36c70f49_o.jpghaida rear ND-02 by olalafoto, on Flickr
F/1.8~F/4, border
https://live.staticflickr.com/65535/51236791840_6297519e36_o.jpghaida rear ND-05 by olalafoto, on Flickr
F/5.6~F/11, border
https://live.staticflickr.com/65535/51236791435_cc3ae2244d_o.jpghaida rear ND-06 by olalafoto, on Flickr
F/1.8~F/4, middle
https://live.staticflickr.com/65535/51235730021_90b0575ae2_o.jpghaida rear ND-03 by olalafoto, on Flickr
F/5.6~F/11, middle
https://live.staticflickr.com/65535/51235938798_cfff639913_o.jpghaida rear ND-04 by olalafoto, on Flickr
F/7.1,F9,F10,border and corner
https://live.staticflickr.com/65535/51235019087_ac42ec7672_o.jpghaida rear ND-07 by olalafoto, on Flickr
========================================================================
field curvature comparison：
manual focus, based on electronic scale in camera display
https://live.staticflickr.com/65535/51236552054_9e1e435e93_o.jpghaida rear ND-08 by olalafoto, on FlickrPerfect!!! These are expected results from the 0.5m Haida rear filter. It's a bit worse than what I'm seeing with the 0.3m Kase.
With the latter at f/5.6, the filtered crops matches the unfiltered one which is not quite the case when compared to the Haida. There is a big induced field curvature, which is very noticeable at wide apertures.
This shows that rear filters + fast ultra wide lenses is not a good idea unless one is shooting at f/8 or smaller apertures. With the big zooms (Sigma and Sony), the Kase's induced field curvature gets masked by ~ f/4 where they are optimal.
Yes, the test result is only marginally acceptable，however, I will still insist on using Haida, because I prefer the operation mode of Haida to Kase, and I updated ghost comparison.
Fred Miranda wrote:
olalafoto wrote
Haida rear filter ND sharpness comparison:Center focus at infinity, 5500K, ACR13.3（only enable vignetting correction）
F/1.8~F/4, corner
https://live.staticflickr.com/65535/51235940328_24b4ffd6d0_o.jpghaida rear ND-01 by olalafoto, on Flickr
F/5.6~F/11, corner
https://live.staticflickr.com/65535/51235939643_4f36c70f49_o.jpghaida rear ND-02 by olalafoto, on Flickr
F/1.8~F/4, border
https://live.staticflickr.com/65535/51236791840_6297519e36_o.jpghaida rear ND-05 by olalafoto, on Flickr
F/5.6~F/11, border
https://live.staticflickr.com/65535/51236791435_cc3ae2244d_o.jpghaida rear ND-06 by olalafoto, on Flickr
F/1.8~F/4, middle
https://live.staticflickr.com/65535/51235730021_90b0575ae2_o.jpghaida rear ND-03 by olalafoto, on Flickr
F/5.6~F/11, middle
https://live.staticflickr.com/65535/51235938798_cfff639913_o.jpghaida rear ND-04 by olalafoto, on Flickr
F/7.1,F9,F10,border and corner
https://live.staticflickr.com/65535/51235019087_ac42ec7672_o.jpghaida rear ND-07 by olalafoto, on Flickr
========================================================================
field curvature comparison：
manual focus, based on electronic scale in camera display
https://live.staticflickr.com/65535/51236552054_9e1e435e93_o.jpghaida rear ND-08 by olalafoto, on Flickr
With the latter at f/5.6, the filtered crops matches the unfiltered one which is not quite the case when compared to the Haida. There is a big induced field curvature, which is very noticeable at wide apertures.
This shows that rear filters + fast ultra wide lenses is not a good idea unless one is shooting at f/8 or smaller apertures. With the big zooms (Sigma and Sony), the Kase's induced field curvature gets masked by ~ f/4 where they are optimal.