Dimensions for hero image on Impulse theme

[daintybykate]

hello 

website: daintybykate.com

password: hello

I use the Impulse theme and was wondering what size my website home page hero slide needs to be to not be cut off and super zoomed in for the college of 3 photos I have made in photoshop.  

I have tried the recommended impulse dimensions of 2880px x 1620 px and it zooms in like the image below. 

Any help or recommendations would be greatly appreciated. 

[YordanB]

Hello, did you find out what size the image should be, cause now I am having the same problem.