The Sigma 70mm f/2.8 DG Macro Art (B&H, Amazon) is primarily a photography lens, though it will be used for video.
In this article let’s take a comprehensive look at the important features and specifications of the Sigma 70mm f/2.8 DG Macro Art (B&H, Amazon) and see how good it will perform specifically for video, cinematography and filmmaking.
I think it is important to mention that Sigma is a third party lens manufacturer and its performance cannot be justly compared to the native lenses.
The aim of this article is to provide you with enough information and perspective so you can decide for yourself whether this lens is right for your film or video.
Important: This article is a comprehensive overview of the lens with available information; and an analysis based on our experience shooting for almost two decades. It is not a hands-on review. If and when we get hold of the lens we’ll be sure to publish a detailed review. If this is not your cup of tea you can stop reading.
Click to what you want quickly:
- TLDR;
- What does DG HSM mean?
- Features:
- Control:
- Basics:
- Alternatives to the Sigma 70mm f/2.8 DG Macro Art
TLDR;
What you need to know for video work about the Sigma 70mm f/2.8 DG Macro Art (B&H, Amazon):
- The Sigma 70mm f/2.8 DG Macro Art is a great third party normal focal length lens.
- The f/2.8 aperture is great for low light work.
- It’s heavier and bigger compared to its competitors.
- 9 blade aperture for a theoretically better bokeh.
- Has a 25.8 cm minimum close focusing distance.
- Has a maximum magnification ratio of 1:1.
- The lens doesn’t have OS, but you will get some stabilization with a camera that has in built stabilization.
- It exhibits breathing.
- This is a popular focal length, used mainly for product shoots and portraiture.
This lens will be useful for following types of filmmaking:
- Wedding filmmaking
- Short filmmaking
- Low budget music videos
- Product Advertisement
This lens can be used to gain the following shots:
- Extreme close up
- Mid Shot
- Close Up
- Glamour Shot
- Product Shot
What does DG HSM mean?
According to Sigma, DG refers to the lenses that are designed specifically for full frame DSLR cameras. Sigma claims that their DG DN lenses are designed specifically and exclusively for full frame mirrorless cameras.
So while the DG HSM will work with a full frame mirrorless camera, but, according to Sigma, a DG DN lens will communicate better with the camera than the DG HSM lens.
HSM refers to their ring-type hypersonic autofocus motor in that lens.
Now this lens, however, is a Macro lens. That means its maximum magnification ratio is 1:1.
Features
Coverage
The Sigma 70mm f/2.8 DG Macro Art (B&H, Amazon) is a full frame lens. It is designed to completely cover a sensor the size of 36mm x 24mm.
If you are considering this lens for an APS-C sensor or other cinema camera, check out this article:
Focal Length
The focal length is 70mm. This is considered as a normal to telephoto focal length on a full frame 35mm sensor.
This focal range is most used for mid shots, close ups, beauty shots and can be also used for extreme close ups.
Aperture
The maximum aperture is f/1.4 and the minimum aperture is f/16.
Having f/1.4 is great for low light. Most people will use it at f/2 or f/2.8 for the purpose of getting optimum sharpness, and to get soft out of focus backgrounds.
The Sigma 70mm f/2.8 DG Macro Art (B&H, Amazon) has 9 diaphragm blades. One expects a smooth bokeh, considering the number of blades, but it’s not always a given. To know more about bokeh:
Resolution
From Sigma’s official MTF charts:
The Sigma 70mm f/2.8 DG Macro Art (B&H, Amazon) is sharp in the center and has a gradual, almost non-existent falloff towards the edges.
With the variance in the Sagittal and Tangential lines, you can infer (somewhat) that the bokeh could be as good as the best primes in the world.
If you are curious and want to read the MTF chart for yourself. Here’s a guide on how to read them easily.
Close Focus
The closest focusing distance of this lens is 0.258cm or 0.84 feet. That’s great for this focal length because you can also use it for close ups. And this being a Macro lens, it is always a plus to have very less close focus distance so you can go get close to your product without losing focus.
Image Stabilization
The Sigma 70mm f/2.8 DG Macro Art (B&H, Amazon) lens doesn’t have OS. At this focal length, you expect some stability in the lenses. Not having image stabilization makes this lens a hard choice for run and gun shoots. Using it cameras that have IBIS can provide it with some image stabilization.
Control
Manual focus system
The Sigma 70mm f/2.8 DG Macro Art (B&H, Amazon) has an infinite turn ring for its focus ring and can turn infinitely one way or the other. Unfortunately for videographers and cinematographers, the Sigma 70mm f/2.8 DG Macro Art is set to focus by wire by default and has no option to switch it to fly by wire.
What is the meaning of focus by wire and fly by wire?
Focus by wire: Let’s say you turn the focus ring to change focus from point A to B. You’d expect the focus to shift accordingly. When you stop point B will be in focus. Now bring the focus point back to A and try again, but at a different speed. Slower or faster, doesn’t matter. Now, even if you precisely rotate to the exact same degree, the focus will not be on point B! The speed of rotation determines which point it is focused on. That’s just completely useless for follow focus work. If an actor or person moves at a different speed, even slightly, you’ll never get the same focus. Avoid focus by wire lenses like the plague (for video work).
Fly by wire: The distance of focus shifted is directly proportional to the speed at which the ring is turned. This is how a manual focus ring is supposed to operate for video and cinematography.
This decision to exclude fly by wire or linear MF by Sigma will make this lens unsuitable for professional cinematographers and videographers.
Autofocus system
Sigma’s autofocus is improving day by day, but it is nowhere near the precision and reliability of Canon or Sony’s autofocus system. Keep in mind, that Sigma is a third party lens manufacturer, i.e. they do not make native lenses. Native lenses, such as Sony’s FE series and Canon’s EF and RF series, have always been better than third party lenses at communicating with their respective cameras.
I do not think anyone will purchase a Sigma lens for its autofocus performance.
Basics
Filter Thread
The Sigma 70mm f/2.8 DG Macro Art (B&H, Amazon) has a filter diameter of 49mm. This is an uncommonly small filter diameter.
Build Quality
The majority of the lens exterior is plastic, though the lens doesn’t feel cheap.
The optical design consists of 13 elements in 10 groups, including aspherical lens, FLD glass and SLD glass.
Size and Weight
The Sigma 70mm f/2.8 DG Macro Art (B&H, Amazon) has a diameter of 70.8mm and a length of 131.8mm for the E-mount. It weighs around 570 grams for the E-mount. The E-mount variant of this lens is the biggest of all mount variants. The L-mount variant is the heaviest of all the variants at 605 grams.
Weather resistance
Sigma claims that all their Art lenses are weather resistant. But again this only holds true if the camera body you will be using is also weather sealed. No camera is truly and officially weather sealed, so the best you can hope for is reliable weather resistance. Sigma claims to coat their lenses with dust and moisture repellent.
This is an Art series lens and we can expect it to perform as such.
What’s in the box
This is what you get in the box (other than the lens):
- Case
- Lens Hood (LH708-01) supplied.
The hood might be useful for photography, but the shape and design makes it mostly vestigial for video work. Some people like to put it on to protect the front element in case of a fall. The hood takes the impact and shatters, but saves the lens. I’d keep it on unless you have good reason not to.
Alternatives to the Sigma 70mm f/2.8 DG Macro Art Lens
In this focal length, there are no alternatives to the Sigma 70mm f/2.8 DG Macro Art, due to its peculiar focal length and Macro capabilities.
I hope you found this overview of the Sigma 70mm f/2.8 DG Macro Art (B&H, Amazon) useful. If we have missed out on something, please let us know in the comments below.
