p.3 #1Sony 12-24 Big Bronco/ STC IR-CUT 64 ND Filter and CPL filter Tests
Yeah corners looked perfect to me at least on back of the LCD zooming in, did not see any image difference on and off just focus differences based on using on the Loxia 21 and F11 (A7rII).
Still not at home and images are on SD cards only at this time so may be a bit but will try to post a pic or a couple when I do download and review them on my home computer.
I had planned to use on other lens and situations but the focus difference got me too spooked and it seemed every chance I had later to use a filter I was somewhat rushed (light was good but changing fast so had no time to spend figure anything out on the fly). Sunsets really linger in Norway but once the sun was low enough using a filter did not see to be beneficial either since I never had much cloud movement occurring.
It seemed I was always getting to the location I wanted or finding a composition I liked just a little later than ideal each time.
p.3 #3Sony 12-24 Big Bronco/ STC IR-CUT 64 ND Filter and CPL filter Tests
So you can cheat a little and if you have sky in there it won't matter. Im going to get a 77mm ND also and carry both as i think I can get 15mm with the 77mm filter but this clip in will be handy for eliminating longer lens filter sizes like 67,72,77 and 82mm. Thats a lot of filter ND to carry and this clip on can eliminate say filters for your 50,85,135 lenses and maybe better for folks that have the longer GM zooms that carry 82mm like the 24-70. So it has its uses but on the 12-24 its limited but its easy to carry and thats the big plus for me for my FE 35, Basis 25, Sony 85 and Batis 135
p.3 #4Sony 12-24 Big Bronco/ STC IR-CUT 64 ND Filter and CPL filter Tests
I tested with the Loxia and it's great even at f/4.
However, since I can't use it on my 12-24/4G (from 12mm until 20mm) I will probably return it. If someone wants it at a discount, let me know.