Lenses and Optics

Setting Up an Optical Testing Station

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There are a lot of right ways to do optical testing. The gold standard is to put the lens on a $150,000 optical bench or run it through a well-equipped Imatest lab. But unless you have an optical bench or Imatest lab handy, that’s not practical. We have to optically test around 400 lenses a […]

How To's

Why You Can’t Optically Test Your Lens with Autofocus

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By far the most common email and PM I get basically says, “I think my lens is optically out of sorts. What do you think?” The second most common is, “So what’s the best way to optically test my lens without a ton of equipment.” Years ago I wrote an overly long post about testing […]

Roger's Corner

Disruption and Innovation

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This is a long article, meant to be read at your leisure.  You better start swimmin’ or you’ll sink like a stone For the times they are a-changin’.       Bob Dylan Technology changes tend to be of two types: incremental improvements or disruptive innovations. Incremental improvements allow one manufacturer to take market share from another […]

Lensrentals News and Alerts

We Love Lenses

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It’s nearly Valentine’s Day. This year, we thought we should express our love….for lenses.

Teardowns and Disassembly

The A7R teardown: A look inside Sony’s awesome full-frame mirrorless camera

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The usual warnings apply: Do not try this at home. This post was made by semi-trained, semi-professional repair technicians who sort of know what they’re doing. The following blog post contains graphic images of the inside of a very nice camera. If such things make you squeamish, don’t read further.  No cameras were harmed in […]

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