Not able to manual focus in night for star photography

Question

I was shooting at f4.5 shutter speed 30s for capturing stars in my photo but was not able to manual focus as we can't set the manual focus for stars.
I am using a 18-55mm Nikkor lens, what I get after the image is captured is a bad focus image.
Question: If i am  not able to see the stars in the viewfinder then how can i set manual focus

Perry · Answer

pre focus on a distant city light, or the Moon if out.

planetmaker · Answer

Stars are at an infinite distance.
Failing to find a brighter similarily distant object (like a far tower with a light on it, or the Moon for instance), you can set your lens to infinity and hope that it works. In reality you likely will have to use a setting slightly less than the absolut maximum focus distance (how exact depends on your lens / camera combination and is subject to experience with your own equipment).

Not able to manual focus in night for star photography

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