01-17-2020, 02:45 PM
The Viltrox and Tokina 20mm have quite (very?) different lens constructions, so you can use that tinfoil for other things again 
Tokina:
http://cokin.com/img/cms/Optiques/Tokina/Firin%20AF%2020mm/firin_af_const.jpg
Viltrox:
https://www.flickr.com/photos/mike-mkvip/31580385347/sizes/c/

Tokina:
http://cokin.com/img/cms/Optiques/Tokina/Firin%20AF%2020mm/firin_af_const.jpg
Viltrox:
https://www.flickr.com/photos/mike-mkvip/31580385347/sizes/c/