Lenses and Optics
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
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 […]
Lenses and Optics
I’m going to open a can of worms today. I’ve been getting more and more emails from people telling me the same story that goes like this: I’ve got this lens. It’s awful. I’ve sent it in for adjustment and the service center tells me it’s ‘in spec’ and nothing is wrong with it. Am […]
Technical Discussions
A long time ago I wrote a blog post called Good Times with Bad Filters about how cheap UV protective filters are different from good ones. It was mostly in fun. Today I’ve got a post about how cheap UV filters may hurt your lens. It’s not in fun. Here at Lensrentals we see lenses […]
Lenses and Optics
In my last article, I wrote about the fact that every copy of a given lens has some bit of sample variation. This affects lens reviews, whether lab-based or photography-based, because the copy they tested will be just a bit different from the copy you buy. I suggested, that if you want to get a […]
