Do you use a DLSR lens on a mirrorless camera? Have you ever considered buying a “Dream Lens” for it? It’s pricey and relatively rare, so it’s worth thinking it through. But a member of Sonyalpharumors, Austrokiwi, allowed us to share his review. He bought a Canon 50mm F0.95 lens for his Sony A7rII. And this is how it performs: [Read more…]
I often get the feeling that photography is talked and written about as if its practitioners have an innate knowledge of the terms involved. Any craft or profession comes with its own specialist language, but if you’re new to it—and even if you’re not—you can often feel overwhelmed by the terminology, let alone the technicalities of the medium. Thinking back ‘hyperfocal distance’ is one of the terms that most baffled me.
You will most likely hear ‘hyperfocal distance’ mentioned in relation to landscape photography. It describes a mathematically calculated sweet-spot that, when you focus there, maximises the depth-of-field across your scene. For, while you might believe that using a small aperture and focusing at infinity would do the job, it doesn’t.
I got an email the other day that got me thinking. A guy simply asked “How far do I have to stop down a lens to get maximum performance. I’ve heard two stops from wide open. I’ve heard down to f/8. Which is correct?”
I asked him which lens he was referring to, and was he talking about the center point, corners, or overall. He didn’t realize that it mattered. He thought all lenses were the same and had this idea that eventually there was an aperture where the lens was maximally sharp and the corners were as sharp as the center. At this point, I realized there was no way I could tell him everything he needed to know in an email and I decided to write a blog post about it.
After learning about the history and science of lenses, and gaining some knowledge about the properties of modern lenses, it’s time to take a deeper look at depths of field and how it’s affected by sensor size.
Kick back as John Hess of Filmmaker IQ takes us on a 17-minute long journey through the optics, the terms and the calculations that will help you understand how depth of field works once and for all.
Cancel your weekend plans, we’ve got an Iris Lamp to build! The awesome DIY tutorial comes to us courtesy of Jonathan Odom, a full time designer and maker over at the Instructables Design Studio. Odom’s portfolio of builds is pretty incredible, but this aperture inspired wall lamp really grabbed our attention. (Kinda reminds me of the Aperture Ring Box we featured not too long ago!)
Odom says the design for his Iris Lamp is somewhat of a spin on a similar lamp he made (which you can check out here). For both designs, he says he was inspired by the notion of “mechanical movement in design that’s typically static.”
The light is powered on and off simply by rotating the outer wood ring, which also opens and closes the aperture iris. [Read more…]
California based educator and DIY maker, Matt Chalker, really, really loves his girlfriend. That’s why when he decided to propose to her, he wanted to make something extra special. And that he did. Chalker spent about 60 hours building one of the coolest engagement ring boxes I’ve ever seen.
Chalker’s girlfriend, a wedding and portrait photographer, is pretty passionate about her craft. He wanted to incorporate that into his proposal and came up with the idea to make a ring box which revealed the engagement ring via working aperture blades. It’s truly something beautiful! [Read more…]
There is a Seinfeld episode where George loses his glasses, yet he is able to spot a coin on the floor by squinting. Without knowing the team at Seinfeld made a very elegant scientific experiment comparing lenses to pin holes.
A Lens makes things sharp by focusing rays of light coming from a source so the rays converge on a single sport.
A pinhole, on the other hand, only allows light to enter from a single direction thus not letting it blur.
Both aspects are very clearly explained in this video by MinutePhysics.
The fact that the depth of field varies depending on focal length seems pretty straightforward, doesn’t it? Matt Granger however says that wide angle lenses don’t necessarily have a smaller depth of field when compared to longer telephoto lenses:
To understand any of this, you have to know what depth of field is: (Yes, this is very basic) Depth of field is basically the depth of your image that is in sharp focus, it is usually about 1/3 in front of your focus and 2/3 behind it.
In his video, Matt conducts a test to prove his point: He takes the same shot with the same framing and only changes the focal length and the position of the camera. The aperture was kept the same – f/2.8 – throughout the shoot. Of course when changing the focal length of your lens you’ll have to physically move the camera if you want your final result to have the same crop.
Here are the results:
One of the first things we learn as photographers are F stops and how we can use them to properly expose a photograph, but there is also such a thing as T stops and we don’t always give them the attention they deserve. Of course, a T-stop may not be essential knowledge on every photo you take, but understanding what a T stop is will give you a better understanding of light, which is never a bad thing for a photographer to have. (It’s also helpful information to have in your bag if you’re going to be lens shopping soon!). And Matt Granger does an amazing job of explaining the difference.
For a while now, Aperture has been Apple’s signature professional photo management app, similar to what Final Cut Pro and Logic Pro have done for video and music. After WWDC, however, things looked a bit bleak for the software after Apple announced its rollout of its new Photos app – the keynote went by with no mention of any updates on Aperture itself. Today, it’s been confirmed by the company that development on the software has officially ended.