So, Like Your Lenses Uncoated? Cooke Offers Uncoated Fronts for S4/i Lenses
Lenses Are my Favorite Gear. Especially Higher End. They’re Like Supercars You Rent to Drive & Dream of Owning.
Another showcasing from the BSC Expo 2017 in London is the availability of uncoated fronts as an option for the Cooke S4/i. They won’t be available from the factory but you’ll send in your lenses to Cooke for the retrofitting directly.
Cool. So What’s the Point?
Almost every modern lens you buy has a chemical coating on the front element. It is what gives the glass that blueish tint when you look at the fronts. The purpose of the coating is to reduce reflections from the surface of the lens elements. When uncoated, the light entering the front element of the lens and passing through the rest of the glass elements is bounced around the inside of the lens.
This scattering of light leads to more flares, streaks, and a low contrast image. You’re also lowering the amount of light hitting the sensor. Many describe the look as ‘vintage’ which makes total sense, because you are removing all of the modern science that goes into the coatings.
So just as with filters, you’re finding a way to change the look of an image before it hits the sensor.
There’s a ton of real science behind it that I can’t understand enough to talk about, so I guess look that up if you want to go into optical science. But here is a video I’ve found that will demo the image quality better than words will do: