EF 50mm f/1.8 - Are these Lines normal on lens?

[GalletaBoss]

 

 

I’m new to this world of photography and recently purchased a Canon EF 50mm f/1.8 and noticed this lines on the lens, did I received a defective lens? 

[MikeSowsun]

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@Stephen wrote:

My lens is dirty, so don't crucify me for that, but I don't see the lines you see on mine:

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I can see at least one similar line on your lens….

[FloridaDrafter]

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@MikeSowsun wrote:

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I can see at least one similar line on your lens….

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Mine has just one, but it's barely perceptible, in fact, I had to take it out in the sun and slowly rotate it to catch it. Almost looks like a seam from the molding process or a tool mark from assembly, but that is just the impression I get.

Newton

[jrhoffman75]

Hi Newton. Mould marks was also my thought after multiple lenses were being reported. I checked Canon's description and the Canon Lens Museum. No mention of moulded elements; none of the elements are reported to be aspherical.