[Armin Siegwarth]

as far as i know canon ef lenses need power for adjusting the iris, And Nikons AF don’t if I am right.

did you know the letus extreme adapter?
https://www.adapterplace.com/component/option,com_virtuemart/page,shop.browse/category_id,11/Itemid,56/

have a look at the sample videos….

cheers
Armin

[Armin Siegwarth]

hi,

could be the fact that the ND filters aren’t neutral. In Digibeta cameras for example it is possible to set an offset for the ND’s if they aren’t neutral.

Another possible thing is the paper you did your white on. some chloride bleached paper fool the white balance. Possible solution: white card from porta brace.

but first try out white’s with differnt nd’s and then remove the nd’s.

I don’t own the ex1 – just guesses.

Best regards
Armin