Ep02 All You Need to Know about Flat Ports

Welcome back! In this episode, we take a deep dive (pun intended) into one of the most misunderstood topics in underwater photography — the use of flat ports. I will dispel some commonly held misconceptions about flat ports and you will discover why using a flat port doesn’t make a lot of sense in this era of high resolution digital cameras as a flat port's color dispersion ruins the image quality in the corners of your images. Through clear visual examples and real underwater shots, this video breaks down: 🌊 How light behaves through a flat port 📏 Why things appear closer, not larger 📐 How flat ports reduce your lens’s angle of view 🌈 What causes color fringing and why you can’t fully fix it in post 🔍 Why even macro lenses suffer from color fringing behind flat ports 🟡 Why dome ports outperform flat ports — in every situation 💡 And why it doesn’t matter whether your flat port is made of glass or acrylic Whether you’re a diver, underwater photographer, or instructor, this video gives you a clear, science-based understanding of how flat ports behave underwater — without the math, but with all the insight. This episode sets the stage for the next one, where we’ll explore dome ports in detail — and why they’re the only right choice for serious underwater photography. If you appreciate deep, accurate explanations and evidence-based testing, please like, subscribe, and share this with your dive buddies or photography students. Let’s raise the standard for underwater imaging together. Timecodes 00:00 - Intro 1:18 - Why flat ports make things look closer and not bigger. 4:56 - Why things looking bigger under water is a psychological effect. 7:08 - How much closer do objects seem when looking through a flat port. 7:50 - How things looking closer behind a flat port reduces the angle of view of your lens. 9:46 - The color dispersion caused by a flat port. 11:05 - Macro lenses also suffer from color fringing when using a flat port. 12:11 - Example of color fringing in a 105mm macro lens shot of a spotted morray eel. 13:22 - Example of color fringing in a 60mm macro lens shot of a frog fish. 13:53 - Why flat ports produce red-blue color fringing and camera lenses produce green-purple color fringing. 15:35 - Why you should use dome ports for macro lenses too. 16:38 - How to compromise quality and practicality when using a dome port for macro photography. 17:56 - Examples of macro photos made through a dome port. 18:32 - Comparing a photo shot through a flat port with a photo shot through a dome port. 1934: - Full frame cameras behind flat ports. 20:35 - Glass vs Acrylic flat ports. 22:46 - Sumary [email protected]💬 #UnderwaterPhotography #FlatPort #DomePort #UnderwaterCamera #UnderwaterOpticsExplained #PhotographyEducation #UnderwaterMacro #ChromaticAberration #ColorFringing #ColorDispersion #UnderwaterVideo #RefractionUnderwater #PhotographyTutorial #DivingEducation