RCicala

RCicala

DPReview Contributor
Lives in United States Memphis, United States
Has a website at www.olafoptical.com
Joined on Oct 7, 2011

Editorial content

Total: 8, showing: 1 – 8
Why are modern 50mm lenses so damned complicated?

Why are modern 50mm lenses so complex? Lens designers didn't add all that extra glass just to charge more money and make the diagram look cool, explains Roger Cicala.

Roger Cicala: Understanding field curvature for fun and profit (part 2)

What is field curvature, and why should you care? In this article – the second of two – professional optics geek Roger Cicala goes even deeper into the subject. Warning: many swirly graphs ahead.

Roger Cicala: Understanding field curvature for fun and profit

What is field curvature, and why should you care? In this article – the first of two – professional optics geek Roger Cicala explains all.

Roger Cicala: the difference between sample variation and a 'bad copy' (Part 2)

Roger Cicala delves back into the murky waters of sample variation among lenses and explains how – depending on how you define your standards – you might end up getting multiple 'bad copies'.

Roger Cicala: the difference between sample variation and a 'bad copy' (Part 1)

In the first part of a two-part article, lens testing expert Roger Cicala explains why inevitable variation among copies of a lens and a 'bad copy' aren't the same thing.

Roger Cicala: why I don't use an MTF bench to test my own lenses

Lens geek and founder of Lensrentals Roger Cicala explains why even with a world-class testing lab at his disposal he doesn't use it to assess his own personal lenses.

'Who am I and what am I doing here?' Introducing Roger Cicala

Meet DPReview's new writer: Roger Cicala, founder of Lensrentals. Be nice – he's doing this for free, for some reason.

Variation Facts and Fallacies
There is no such thing as a 'perfectly' calibrated lens or camera. Sample variation is a fact of life. In this article, Roger Cicala of Lensrentals explains what this means, and what - if anything - you need to worry about.