From the course: Learning Underwater Photography

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The optics of wide-angle ports

The optics of wide-angle ports - Photoshop Tutorial

From the course: Learning Underwater Photography

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The optics of wide-angle ports

- [Deke] In this movie, we're going to discuss the optics of wide angle ports. And this topic, by the way, really surprises me that the port also influences the optics given that, I had though, it was just a window in the housing. - [Hergen] You definitely have to take your port choice into consideration when you're shooting wide angle underwater. So, we're looking at what otherwise would have been a nice underwater reef scene. But if you look at that bottom right corner, your going to see that the edges are really not looking so good. - [Deke] And let's go ahead and blow that up so we could really see it. - [Hergen] So here we're going to take a look at the issue of corner sharpness. Now this becomes a real issue, especially when shooting rectilinear lenses. Rectilinear lenses like larger domes and sometimes you also need to put a diopter or a magnifier on the front of the lens. - [Deke] So, let me get this straight because I've never used a diopter. It is actually another lens that…

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