News tagged with "lensrentals"

LensRentals' Roger Cicala has published an interesting comparison of the Zeiss ZE 135mm F2 APO-Sonnar and the Canon EF 135mm f/2L USM lens, with both optics mounted on a Canon EOS 5D Mark II. While you'd expect nothing less than excellent results from the Zeiss optic, just what advantages can the heavier and much more expensive lens offer compared to Canon's well-regarded prime lens? Click through to read Cicala's findings.

Lensrentals' Roger Cicala has published the third part of his investigation into Canon's autofocus systems, looking at what's changed behind the marketing claims. It's not unusual for manufacturers to promise that their products are 'new and improved,' but explanations about what's been changed or how much of an improvement it offers are harder to come by. Cicala has delved into Canon's patents (and taken some lenses apart), to see exactly why the EOS 5D Mark III's focus so consistently out-performs its predecessors'.

Lensrentals' Roger Cicala has just tested Canon's EF 40mm F2.8 STM pancake prime lens, with interesting results. Cicala has tested eight copies of the $199 lens, to see what compromises have been made to offer a video-optimized lens in a small package for such a low price. His initial impressions are worth reading if you're one of the people considering this lens.

Photographer Andrew Kane found himself having to report damage to the Nikon D4 he'd rented this weekend, after it was attacked by a grizzly bear. Kane had the presence of mind to document the attack, using his D700 and 70-300VR that he had slung around his neck - grabbing some impressive sharp images of the bear mauling the rented kit. LensRentals seem satisfied with his explanation - Roger Cicala has blogged that replacement gear is already on the way to Kane.

The ever-inquisitive Roger Cicala at LensRentals has dismantled a light-leak-fixed Canon EOS 5D Mark III and compared it to an unmodified version. The solution, as proposed by every tool-shed tinkerer, appears to be a piece of black electrical tape, which Cicala says successfully stops stray light reaching the camera's metering sensor. When asked if he'd send his own Mark III back to be modified, Cicala points out that he doesn't 'do long exposure night photography with autometering.' But, in the unlikely event that you do, you can rest assured that Canon can fix your camera for you.

Roger Cicala of LensRentals has written an article about why 'soft' lenses occur and how you'll know if you have one. The article summarises his experience and testing of the phenomenon and explains how the pursuit of a 'perfect' lens is a fool's errand.

Roger Cicala of LensRentals has written an article about lens and camera sample variation. The latest article builds on the several excellent pieces he's already written by subjecting a series of lenses to studio testing. As one of the few independent people in a position to test and assess sample variation with a reasonable sample size, it's well worth a read. As with all his posts, it does a good job of explaining and demonstrating the inherent variability and inconsistencies in lens behavior. It also addresses the reasonable desire (and sometimes unreasonable behavior) of photographers to get a 'good copy' of a lens.

Lens rental company Lensrentals has posted an interesting blog post on the subject of filters. Ostensibly side-stepping the issue of whether UV filters are actually beneficial, it illustrates the effect of stacks of UV filters of different qualities. Acknowledging this isn't a real-world application, it does show that, if you are going to use filters, you probably shouldn't try to skimp on them. The post also shows exactly why you should never be tempted to stack more than 49 filters on the front of your lens.