My time to shine boys, literally picked up photography for the sole purpose of taking better photos of models and then fell into the rabbit hole a few years ago.
>>7013869>>7013279f/8 is a great place to start since it offers the largest DoF without triggering most lenses D(iffraction)L(imited)A(perture) however maximum sharp occurs somewhere between DLA and widest aperture which varies between model to model and needs to be experimented upon to know exactly at which setting your particular lens is sharpest. The loss isnt much but if you need to capture those small details, then it's something to keep in mind.
As for cars, you'll need to use a really thin razor saw but since most doors are curved you might have a tough time of it. You may also like to try scribing but considering the thickness of the plastic you also might not.
>>7013886>I know nothing about photography> f20+dont do that
>nice, clean images with no blurring around the edgesif you're into pixel peeping like I am you'll never be happy. Ignorance is bliss after all.
>18-55mm lenswhich body do you have?