Category » Roger’s Ramblings

Humor and sarcasm

My Third Grader Analogy for Lens Reviews and Testing

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I make a joke about this sometimes, but I think it’s more and more appropriate. Every day, I see more and more people take some single bit of data published on a lens and extrapolate the entire meaning of the photographic universe from that bit of data. My joke has always gone, “a single lens analysis […]

Equipment

Roger’s Only Slightly Angry Father’s Day Gift Suggestions

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I will admit I’m a nightmare to buy gifts for. If I want it, I generally have already bought it. So my kids tend to dread Father’s Day because they have to find a gift that I want that I haven’t realized I want yet. Well, that’s how it should work in theory. In practice, […]

Equipment

A Look at Electromagnetic Focusing

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If you’re like me you like to know what’s going on inside your camera or lens to some degree. They are tools, and if I want to get the best use out of my tool I need to know it’s strengths and weaknesses. You may not have noticed, especially if you shoot just Canon or […]

Equipment

Mythbusting: Parfocal Photo Zooms

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About twice a week I get a call from a photo-videographer wanting to know which photo zoom lenses in a certain focal length are parfocal (stays in focus while changing focal lengths). It’s understandable why they would ask; a superb photo zoom is 1/10th the cost of a good video zoom. They get pretty mad […]

Equipment

Optical Quality Assurance

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  Pinhole images from new, but optically decentered lens. Olaf Optical Testing, 2016   After we published a number of posts about copy-to-copy variation, people were quick to say that this company or that needs to ‘just’ improve quality control. I totally agree but realize most people don’t have a clue what ‘improving quality control’ […]

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