Archive for: roger cicala

Article: All About Coatings

Article: All About Coatings

New Article: Reflections on reflections. Coatings: The Most Important Part of Your Lens
We are posting another article written by Roger Cicala at LensRentals.com.

Todays article touches on coatings. Their history, and their importance in optical design. As always, it’s pretty informative..

So How do Coatings Work?
It’s pretty simple to explain if you have a Ph. D. in optical physics and speak higher order mathematics. I don’t, so I’ll just have to explain it to you like it was explained to me (and I’ll put some references at the end of the article for those of you who want to double check the Trig and Calculus formulas). Basically, though, there are three types of coatings, each working in a different way. The first two types can be combined with each other to improve their effectiveness; the third type (nanocoating) is so effective it doesn’t need any help.

Read The Entire Article

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New Article – Lens Genealogy

New Article – Lens Genealogy

Lens Genealogy
Ever wondered how a lens is designed, where it comes from or why things are done the way they are? This new article from Lensrentals.com’s Roger Cicala may answer some of those questions.

It’s a great article and well worth the read, just have some time for it.

I knew that today’s lenses are all designed using computer programs, but I was surprised to find new lenses aren’t designed from scratch. Designers start with an existing lens design and modify it. Of course, a lens designer doesn’t say “this lens really sucks, let’s use it as our starting point”. They start with a good design and try to improve it.

Read the article | Visit LensRentals.com

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