Helios 44-2 58mm Russian Lens for M42 Mount cameras

When aprature is on f6 can we adjust the light to get aprature f2

For the seller: is the product I will receive the same one that is in the picture on Amazon? The one with alternating black and white zebra on bottom?

Does it come with the lens covers for the bback and front lenses?

What adapter is needed for Sony a6000? I see it asked below but don’t understand the answer. Thank you!