The SIRUI Aurora 35mm F1.4 and Aurora 85mm F1.4 share the same family name, a bright F1.4 maximum aperture, autofocus, and several similar physical controls. But in practical photography, they are very different lenses.
The 35mm is the wider and more flexible option for street photography, travel, environmental portraits, everyday shooting, and scenes where the surroundings matter.
The 85mm takes the opposite approach. Its tighter field of view and longer working distance make it much more naturally suited to portraits, events, subject isolation, and compositions where the background should play a smaller role.
So choosing between them is less about finding the "better" lens and more about deciding which perspective fits the photographs and videos you want to create.
Comparison note: Blog60s has not conducted side-by-side hands-on optical, autofocus, sharpness, bokeh, flare, distortion, focus-breathing, or durability testing of these lenses. This comparison is based on manufacturer specifications, official documentation, product information, and publicly available information. Manufacturer performance claims are identified as such and are not presented as independent Blog60s test results. Specifications, compatibility, pricing, and availability may change over time.
The SIRUI Aurora 35mm F1.4 and 85mm F1.4 share an F1.4 aperture but provide dramatically different perspectives.
SIRUI Aurora 35mm F1.4 vs 85mm F1.4: Key Specifications
The specification table immediately shows that these lenses have more in common than their focal lengths might suggest.
| Specification | SIRUI Aurora 35mm F1.4 | SIRUI Aurora 85mm F1.4 |
|---|---|---|
| Format | Full-frame | Full-frame |
| Focal length | 35mm | 85mm |
| Maximum aperture | F1.4 | F1.4 |
| Minimum aperture | F16 | F16 |
| Optical construction | 16 elements in 11 groups | 14 elements in 9 groups |
| Aperture blades | 13 | 15 |
| Minimum focus distance | 0.35m / 1.15ft | 0.85m / 2.79ft |
| Maximum magnification | 0.14x | 0.1152x |
| Filter thread | 62mm | 67mm |
| Autofocus | Yes | Yes |
| AF/MF switch | Yes | Yes |
| Function button | Yes | Yes |
| Physical aperture control | Yes | Yes |
| Click/de-click aperture | Yes | Yes |
| USB-C firmware support | Yes | Yes |
| Approx. weight | 490–495g, depending on mount | 540–550g, depending on mount |
The biggest difference is therefore not the feature list.
It is the 35mm versus 85mm focal length.
That difference fundamentally changes framing, working distance, perspective, background rendering, and the types of photography for which each lens is most convenient.
35mm vs 85mm: The Most Important Difference
If you are deciding between these lenses, focal length should come before almost everything else.
On a full-frame camera, 35mm gives a moderately wide perspective. It allows photographers to include considerably more of the environment around the subject.
An 85mm lens has a much narrower field of view.
To photograph the same subject at approximately the same size in the frame, the photographer normally needs to stand farther away with the 85mm.
That change in camera position also changes how the relationship between the subject and background appears.
This is why choosing between the Aurora 35mm and 85mm should not simply be treated as a specifications contest.
They create different photographs.
SIRUI Aurora 35mm F1.4: Better for Environmental Photography
The Aurora 35mm F1.4 makes the most sense when the environment is an important part of the image.
That can include street photography, travel, documentary work, restaurants, interiors, environmental portraits, everyday photography, and video.
With 35mm, it is relatively easy to show a person together with the location around them.
For example, a portrait of a chef can include the kitchen. A photograph of a musician can include the venue. A travel portrait can show both the person and the landscape or city surrounding them.
This ability to provide context is one of the major strengths of the 35mm focal length.
SIRUI Aurora 85mm F1.4: Better for Traditional Portraits
The Aurora 85mm F1.4 is much more specialized.
Its narrower field of view makes it naturally suited to portraits where the photographer wants the subject to dominate the composition.
Head-and-shoulders portraits, half-body portraits, fashion, weddings, events, and other people-oriented photography are obvious applications.
Because the photographer typically works farther away than with a 35mm lens for equivalent subject framing, the visual relationship between the subject and background also changes.
The 85mm can therefore be a more natural choice when environmental context is less important and subject isolation is the priority.
Portraits: 35mm or 85mm?
Both lenses can photograph people.
They simply produce very different styles of portrait.
Choose 35mm for Environmental Portraits
A 35mm portrait can deliberately include the subject's surroundings.
This can be useful when the location tells part of the story.
Street portraits, travel portraits, workplace portraits, musicians, artists, restaurants, shops, and documentary photography are good examples.
However, photographers need to pay attention to camera distance.
Moving very close to a person's face with a wider lens can exaggerate perspective. For conventional headshots, photographers may therefore find an 85mm easier to use.
Choose 85mm for Tighter Portraits
The 85mm is more naturally suited to tighter framing.
It allows the photographer to stand farther from the subject while filling more of the frame.
For headshots and conventional portrait sessions, this can provide a comfortable working distance and make it easier to simplify the composition.
If portrait photography is the primary purpose of the purchase, the 85mm has the more specialized focal length for that job.
Both Have an F1.4 Maximum Aperture
There is no aperture advantage in the basic specification comparison.
Both lenses open to F1.4.
This provides substantial light-gathering capability for indoor photography, night photography, events, portraits, and other situations where light levels are limited.
F1.4 can also produce shallow depth of field.
However, identical aperture numbers do not mean the two lenses will produce identical background blur.
Focal length, camera-to-subject distance, subject-to-background distance, framing, and optical design all affect the final appearance.
The 85mm will generally make strong subject isolation easier to achieve in typical portrait compositions, while the 35mm allows more environmental context to remain visible.
Which Is Better for Background Blur?
If the goal is conventional portraits with strong background separation, the 85mm focal length is the more natural tool.
That conclusion comes from the photographic characteristics of the focal length and typical shooting distance, not from an independent Blog60s bokeh test.
The Aurora 85mm also uses a 15-blade aperture, compared with 13 blades in the Aurora 35mm.
A higher blade count can help maintain a more rounded aperture opening when stopping down, but blade count alone does not determine bokeh quality.
The appearance of out-of-focus highlights depends on the complete optical design and shooting conditions.
Blog60s has not conducted a controlled side-by-side bokeh test of these two lenses.
Which Is Better for Street Photography?
For most conventional street-photography situations, the 35mm focal length is substantially more versatile.
It allows the photographer to capture people, buildings, vehicles, signs, and environmental details without requiring as much distance from the scene.
It is also easier to work with in crowded streets or confined spaces.
The 85mm can still be used for street photography, but it produces a very different style.
Its tighter framing works well for isolating distant details or photographing subjects from farther away.
So the choice depends on whether you want to be inside the scene with 35mm or isolate smaller portions of it with 85mm.
Which Is Better for Travel?
The Aurora 35mm F1.4 is also the more general-purpose travel focal length.
Travel photography frequently involves architecture, restaurants, streets, landscapes, people, interiors, markets, and everyday scenes.
35mm can cover many of those situations without forcing the photographer to move extremely far from the subject.
An 85mm lens is less flexible when space is limited.
However, it can be an excellent second lens for travel portraits, details, compressed compositions, performances, and subjects that cannot be approached closely.
A 35mm + 85mm combination therefore makes considerable sense as a two-prime travel kit.
Minimum Focusing Distance
The Aurora 35mm has a substantial advantage when focusing close.
Its minimum focusing distance is approximately 0.35m / 1.15ft, compared with 0.85m / 2.79ft for the Aurora 85mm.
Maximum magnification is also slightly higher:
35mm: 0.14x
85mm: 0.1152x
Neither lens is a true macro lens.
However, the 35mm provides greater flexibility when photographing food, objects, environmental details, products, and other subjects from relatively close distances.
For tabletop and everyday detail photography, that can be useful.
Optical Design
The two lenses use different optical formulas.
The Aurora 35mm F1.4 uses 16 elements in 11 groups, while the Aurora 85mm F1.4 uses 14 elements in 9 groups.
Those numbers should not be used to declare one lens optically superior.
More elements do not automatically mean better image quality, just as fewer elements do not automatically produce better rendering.
Each optical design has different requirements because a 35mm lens and an 85mm lens solve different optical problems.
SIRUI makes performance claims concerning sharpness, aberration control, distortion, flare, and other optical characteristics.
Blog60s has not independently measured those characteristics side by side.
What About Sharpness?
A meaningful sharpness comparison would require both lenses to be tested under controlled conditions.
That would include center, mid-frame, and corner performance at F1.4 and multiple stopped-down apertures.
Testing should also account for focusing distance, sample variation, camera resolution, focus accuracy, and image processing.
Blog60s has not performed that testing.
Therefore, this comparison does not declare either lens sharper than the other based solely on manufacturer specifications.
For buyers who consider wide-open sharpness a primary concern, independent sample images and controlled lens tests are worth examining before purchase.
Autofocus
Both Aurora lenses provide autofocus as well as manual focus operation.
They also include physical AF/MF switches, reducing the need to change focus mode through camera menus.
SIRUI promotes autofocus characteristics such as smooth operation, subject tracking support, and eye-detection compatibility when used with supported camera bodies.
Actual autofocus performance is influenced by more than the lens itself.
Camera body, firmware, AF mode, subject movement, lighting, focus area selection, and other factors can all affect results.
Blog60s has not performed a controlled autofocus speed or tracking comparison between the Aurora 35mm and 85mm.
Therefore, the safest conclusion is that both provide modern autofocus functionality, not that their real-world AF performance is identical.
Physical Controls
One appealing aspect of the Aurora family is that SIRUI did not reduce the lenses to simple focus rings.
Both provide several direct physical controls.
Depending on the version, these include an AF/MF switch, customizable function control, physical aperture operation, aperture locking functionality, and click/de-click aperture behavior.
For photographers, these controls can make operation faster.
For filmmakers, the ability to de-click aperture control is particularly useful because it allows smoother exposure changes than conventional clicked aperture positions.
This gives both Aurora lenses some crossover appeal between photography and video.
35mm vs 85mm for Video
The focal-length distinction matters just as much for video.
The 35mm F1.4 is the more flexible option for environmental shots, handheld work, establishing shots, interviews where the surroundings matter, travel videos, and general-purpose filmmaking.
The 85mm F1.4 is better suited to tighter shots, close-ups, portrait-style video, detail shots, and situations where stronger subject isolation is desirable.
SIRUI promotes focus-breathing control as part of the Aurora design.
However, Blog60s has not independently measured focus breathing on either lens.
Video users for whom breathing is particularly important should examine controlled focus-pull footage before making a purchase decision.
Size and Weight
The Aurora 35mm is the lighter of the two.
Depending on mount, it weighs approximately 490–495g.
The Aurora 85mm weighs approximately 540–550g, again depending on mount.
The difference is roughly 50–60 grams.
That is noticeable on paper but unlikely to transform the overall experience by itself.
Camera body size, grip design, accessories, cages, microphones, gimbals, and other equipment can have a much larger effect on the balance of a complete setup.
For photographers building the lightest possible kit, however, the 35mm has the advantage.
Filter Size
The lenses also use different filter diameters.
The Aurora 35mm accepts 62mm filters.
The Aurora 85mm accepts 67mm filters.
This matters if you already own expensive ND filters, circular polarizers, diffusion filters, or other accessories.
Step-up rings can sometimes allow a larger filter to be used on a lens with a smaller thread, but buyers should account for the different native diameters when planning a two-lens kit.
USB-C Firmware Updates
Both lenses support firmware updates.
This is particularly useful for autofocus lenses because firmware can potentially address compatibility or operational issues over the life of the product.
Users should download firmware only from SIRUI's official support resources and make sure the firmware corresponds to the exact lens and mount.
The presence of firmware support does not guarantee future features, but it gives SIRUI a mechanism to update lens behavior without requiring hardware replacement.
Full-Frame and APS-C Considerations
Both lenses are designed around full-frame coverage, but field of view changes when they are used on an APS-C camera.
A 35mm lens on APS-C produces framing closer to a standard or short-normal perspective than it does on full frame.
An 85mm lens becomes substantially tighter and may require considerably more working distance for portraits.
This is particularly important when evaluating mount options for APS-C systems.
The focal length printed on the lens does not physically change. What changes is the field of view produced by the smaller sensor.
Low-Light Photography
Because both lenses have an F1.4 maximum aperture, either can be useful in low-light environments.
The difference is what you want to photograph.
For night streets, restaurants, environmental portraits, indoor documentary work, and travel, the 35mm provides the more flexible field of view.
For low-light portraits, stage performances, events, and isolated subjects, the 85mm may be more appropriate.
The same F1.4 aperture therefore serves two different photographic styles.
Weddings and Events
This is one situation where owning both focal lengths can be particularly useful.
A 35mm lens can photograph groups, venues, preparations, tables, dancing, and environmental moments.
An 85mm can handle portraits, ceremonies, details, speeches, and tighter candid photographs from farther away.
Rather than directly competing, the two focal lengths can complement each other.
Photographers using two camera bodies often pair wider and longer primes for exactly this reason.
35mm + 85mm as a Two-Lens Kit
If budget and carrying weight permit, the Aurora 35mm and 85mm can form a logical two-prime setup.
The 35mm handles environmental photography.
The 85mm handles tighter compositions.
Both provide F1.4 maximum apertures, meaning the photographer retains strong low-light capability across both focal lengths.
There is also enough separation between 35mm and 85mm that the lenses do not feel redundant.
A 35mm + 50mm combination can sometimes overlap considerably in practical use. Moving from 35mm to 85mm produces a much more obvious change in framing and working distance.
SIRUI Aurora 35mm F1.4: Pros and Cons
Pros
- More versatile general-purpose focal length
- Well suited to street and travel photography
- Strong choice for environmental portraits
- Better suited to confined spaces
- F1.4 maximum aperture
- 0.35m minimum focusing distance
- Slightly higher 0.14x maximum magnification
- Lighter than the 85mm
- Smaller 62mm filter thread
- Autofocus
- Physical aperture controls
- Click/de-click operation
- USB-C firmware support
- Useful for both photography and video
Cons
- Less specialized for tight traditional portraits
- Requires careful camera distance for close facial portraits
- Does not isolate distant subjects like an 85mm
- Blog60s has not independently tested optical performance
- Bokeh and AF performance require real-world evaluation
SIRUI Aurora 85mm F1.4: Pros and Cons
Pros
- Classic portrait focal length
- Excellent focal-length category for headshots and tighter portraits
- F1.4 maximum aperture
- Naturally suited to strong subject isolation
- 15-blade aperture
- Autofocus
- Physical aperture controls
- Click/de-click operation
- USB-C firmware support
- Useful for weddings and events
- 67mm filter thread
- Relatively manageable weight for an F1.4 portrait prime
Cons
- Less versatile in tight spaces
- 0.85m minimum focusing distance
- Lower maximum magnification than the 35mm
- Heavier than the 35mm
- Less practical as an only lens for general travel photography
- Blog60s has not independently tested sharpness, bokeh, or AF performance
Which Lens Should You Choose?
The decision becomes much easier when based on subject matter rather than specifications.
Consider the Aurora 35mm F1.4 if you mainly shoot:
- Street photography
- Travel
- Environmental portraits
- Everyday photography
- Restaurants and interiors
- Documentary work
- Wider video compositions
- People together with their surroundings
Consider the Aurora 85mm F1.4 if you mainly shoot:
- Portraits
- Headshots
- Weddings
- Events
- Fashion
- Tighter candid photography
- Subject-isolated video
- Scenes where you can work farther from the subject
If you are buying only one lens and want maximum general-purpose flexibility, the 35mm focal length covers a broader range of everyday situations.
If the lens is being purchased specifically for portrait work, the 85mm focal length provides the more specialized perspective.
And if portraits, events, travel, or professional people photography make up a large part of your work, owning both focal lengths can make more sense than treating them as direct substitutes.
SIRUI Aurora 35mm vs 85mm: Key Takeaway
The Aurora 35mm F1.4 and Aurora 85mm F1.4 share many features, but they should not be viewed as interchangeable lenses.
The 35mm F1.4 is about context.
It gives photographers room to include the environment, work in smaller spaces, photograph street scenes, travel, and create environmental portraits. Its 0.35m minimum focusing distance also gives it greater flexibility for nearby subjects.
The 85mm F1.4 is about isolation.
It provides tighter framing, greater working distance, and a focal length naturally suited to conventional portraits, events, and compositions where the subject should dominate the image.
Both provide F1.4 maximum apertures, autofocus, physical controls, video-oriented aperture operation, and firmware support.
The most important question is therefore not which Aurora has the more impressive specification sheet.
It is how much of the world you want around your subject.
Choose 35mm when the surroundings are part of the story. Choose 85mm when the subject itself should take center stage.
For photographers who regularly need both approaches, the two lenses can form a highly complementary 35mm + 85mm prime combination.
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