Posts Tagged ‘testing’

MTF Testing the Canon 11-24mm f/4L, the World’s Widest Full Frame Rectilinear Lens

Editor’s note: If you’re unfamiliar with how to interpret MTF charts, you can find primers here and here.


mfttesting

I’ll be honest. I’m pretty excited about the Canon 11-24mm f/4 L lens. I love shooting ultra-wide and the chance to shoot this wide with a rectilinear lens on a full-frame camera has me pretty excited. But I’m also very aware of how near-impossibly difficult designing a lens this wide would be, so my expectations were tempered a bit.

There’s a reason I’ll often stitch together a couple of 24mm shots for a landscape rather than take one 16mm shot. OK, there are several reasons, but image quality is high among them.
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Testing the Yongnuo 50mm f/1.8 with Nightscape Photography

Yongnuo 50mm Image 1

February has brought back the galactic core of the Milky Way into the sky. It is now rising in the east just before sunrise. Each week it will rise a little bit earlier in the night.

I have a trip planned for this spring and have been thinking about some of the shots I want to do. One of them is one where I think a lens longer than the 24mm might be useful to really bring some mountains and the Milky Way together.
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Nikon Scores Another DxOMark Hit with the D750, Its 6th Camera to Make the Top 10

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Nikon’s newly-announced D750 has impressed those who have managed to get their hands on it thus far, but to properly put it through its paces, DxOMark ran it through its trusted sensor tests.

As expected, it came out with quite high marks, putting it in 8th place on DxOMark’s overall rankings and making it the 6th Nikon camera to make it into the top 10.

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I Sing of OLAF: Lensrentals Names Its New Gizmo, May Offer Optical Testing for Cheap

rogerfocus

I have a couple of things to talk about today. First, is to announce the winner of our name the new machine contest. Second is to answer about 1,000 people’s questions regarding optical testing and adjustment. Read more…

Video: Torture Testing the Front Element of Canon’s ‘Thrifty Fifty’ 50mm f/1.8 II

Photographers commonly place UV filters on the front of their camera lenses in order to protect the glass front element. Aside from preventing dust buildup, the filter also takes the brunt of any impact seen by the front of the lens. If you have to have some glass shatter, you’d rather it be a relatively cheap filter compared to an entire lens, right?

But how easy is it to damage or destroy the front element of a lens? Photographer Richard Choi had the opportunity to find out a few years ago when he found a bricked lens on his hands.
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Testing Out Sigma’s Lens Calibration USB Dock and Optimization Pro Software

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“Commerce makes progress. Fortune passes everywhere.” – Frank Herbert

A few years ago I was accused of being a Sigma hater. (For the record, I did hate their quality control and so-called repair service at that time, and I didn’t hesitate to say so.) For the third or fourth time in the last year, I’m about to be accused of being a Sigma fanboy.
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Stabilized Canon 24-70mm f/2.8L On the Way, But May Be A Year Away

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After the Canon 24-70mm f/2.8L Mark II was announced at the beginning of this year, many photographers were disappointed that it didn’t include Image Stabilization. When October rolled around, there were new rumors that Canon had an IS version of the 24-70mm up its sleeve. The company did, but it wasn’t what people were expecting. When the new IS lens was unveiled in November, it was an f/4 lens rather than an f/2.8.

If you’re one of the many people who wanted both the convenience of having IS and the benefits of having f/2.8, here’s some good news: there is indeed a 24-70mm f/2.8 IS on the way.
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Facebook ‘Photo Syncing’ Uploads Your Smartphone Photos As They’re Shot

Facebook is testing out a new feature for its Android mobile app called “Photo Syncing”. The feature automatically backs up your smartphone’s photographs by uploading them to Facebook as they’re shot, tucking them away inside a private “Synced from Phone” tab on your photos page that isn’t visible to anyone but you. You can then later choose which photos you’d like to make private and which you’d simply like for Facebook to hold on to.
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Behind the Scenes with Camera and Lens Testing Service DxO Labs

Stephen Shankland over at CNET has written an interesting behind-the-scenes look at how DxO Labs — one of the world’s premier camera testing services — evaluates equipment. DxO Labs is based near Paris, France and was the result of a 2003 spinoff from a company called Vision IQ, which specialized in swimming pool safety. Since then, the group has published over 185 in-depth camera reviews on its website DxOMark.
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Test the Shutter Speed of Your Camera Using a TV or Monitor

Wondering whether or not the shutter speeds on your camera are accurate? Instead of taking it to a shop or buying expensive testing equipment, you can use an old television or CRT monitor as a simple shutter speed tester! Camera enthusiast Rick Oleson has an easy to understand diagram showing what you can expect to see from the screen at different shutter speeds. For a more technical explanation and tutorial, check out this article that appeared in a 1967 issue of Popular Science.

You already own a shutter speed tester [Rick Oleson]