Category » Technical Discussions

Lenses and Optics

Optimus Prime

By

Today’s topic is prime lenses, those lenses that (GASP!!!) don’t zoom! Wait, don’t leave. This is really worth your time. (OK, those of you who already shoot entirely or mostly with primes can leave, there’s probably not much for you here.) About 10 times a week, in discussing the best lens for the job with […]

Lenses and Optics

Teleconverters 101

By

The problem, I think, is that it seems so simple. “If I add a 2x teleconverter I’ll get that closeup shot I want.” We all know what a teleconverter’s purpose is: it magnifies the image by a factor of 1.4x or 2×. A 300mm lens with a 1.4x converter becomes a 420mm lens. With a […]

Lenses and Optics

"This lens is soft" and other myths

By

One of the most common examples of anti-logic we see at LensRentals is the statement The lens is soft/frontfocuses/backfocuses. Now don’t get me wrong, there are bad copies of lenses out there, as best we can tell ranging from 3% to 7% of lenses. And we know, despite our checkout procedures, that 1 of 400 […]

Lenses and Optics

Front Element Scratches

By

We had a chance to make a pretty fun demonstration today, and here it is. As most of you know, we’re very finicky about our gear. We don’t like even tiny scratches on front elements or dust in a lens (although a bit of that is inevitable). We’re like you. We want the lens to […]

Follow on Feedly