Geek Articles
I mentioned in our first post in this series that one of the major reasons I was interested in looking at field curvatures was as a means of detecting lenses that are weaker on one side (or perhaps one corner). If you haven’t looked at that post, you really need to before you tackle this […]
Lenses and Optics
We’re nearing the end of the Varation series for prime lenses. If you are joining in late, you may want to go back to the original article for an introduction into the methods used. Today will look at the short telephoto group, lenses ranging in focal length from 85mm to 150mm. We’ve also included a summary table of […]
Lenses and Optics
When we started this series, we introduced our methods using 24mm lenses, then followed up with looks at the 50mm and 35mm groups. Today we’re going to go back to the wide-angle lenses; the ones we expect to have the most variation of all. We probably should call this post the Zeiss Invitational, since they […]
Resolution Tests
Last week we posted an introductory article on how we measure copy-to-copy variation in different lenses. I’ll be continuing to publish these results over the next few weeks for prime lenses. We will eventually have a database put up, but I think it’s important to look at the different lenses in smaller groups, illustrating some […]
Lenses and Optics
A funny thing happened when I opened Lensrentals and started getting 6 or 10 copies of each lens: I found out they weren’t all the same. Not quite. And each of those copies behaved a bit different on different cameras. I wrote a couple of articles about this: This Lens is Soft and Other Myths […]
