Sigma BF Full-Frame Mirrorless Camera or Sigma fp 45mm f/2.8 Lens? Which Sigma Model to Buy
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When comparing the sigma bf full frame mirrorless camera vs fp 45mm f 2 8 lens, you are looking at two distinct Sigma tools. Both use a full-frame sensor and the L-mount system for broad lens compatibility. The main difference is their form and function. The BF is a new unibody body designed for intuitive control and high-resolution video. The fp is a compact camera body bundled with a 45mm f/2.8 lens, focusing on portability and versatile photography.
Key differences
| Aspect | Sigma BF Full-Frame Mirrorless Camera | Sigma fp with 45mm f/2.8 Lens |
|---|---|---|
| Configuration | Body Only | Camera with 45mm f/2.8 Lens |
| Video Resolution | 6K | 4K UHD |
| Sensor Resolution | not listed | 24.6MP |
| ISO Sensitivity | not listed | Expandable up to 102400 |
| Color Modes | 13 modes | not listed |
Which one should you choose?
Choose Sigma BF Full-Frame Mirrorless Camera if
- You want a dedicated camera body without an included lens.
- You need 6K video recording capabilities.
- You prefer a camera with thirteen specific color modes.
Choose Sigma fp with 45mm f/2.8 Lens if
- You want a complete kit with a 45mm f/2.8 lens.
- You prioritize a compact and lightweight body.
- You need an expandable ISO range up to 102400.
Verdict: The Sigma BF suits videographers and photographers who want a specialized body with advanced video specs and unique color profiles. The Sigma fp with the 45mm lens is better for those seeking a portable, ready-to-shoot kit with strong low-light performance.
Sigma BF vs fp Kit Comparison
Configuration and lens
The Sigma fp comes as a bundle that includes the 45mm f/2.8 Contemporary DG DN lens. This setup provides you with a complete imaging system right out of the box, ready for immediate use. In contrast, the Sigma BF is sold as a body-only configuration. You will need to purchase a lens separately to make this camera functional. This distinction matters significantly if you are starting with no existing glass. The fp kit offers immediate versatility with its included prime lens, while the BF requires additional investment and selection effort to achieve a similar starting point.
Build and construction
Build quality differs markedly between these two models. The Sigma BF features a true unibody structure carved from a single block of aluminum. This process takes seven hours per unit, resulting in unprecedented rigidity and a solid feel. The Sigma fp emphasizes a compact and durable design with a splash-proof structure. It is built for portability and robustness in diverse environments. While the fp is lightweight and resistant to the elements, the BF prioritizes mechanical solidity through its monolithic aluminum construction. You get a distinct tactile experience with each, depending on whether you value monolithic rigidity or rugged portability.
Video resolution
For video production, the Sigma BF offers higher resolution capabilities. It supports 6K recording and includes L-Log recording modes. These features allow you to take advantage of the wide dynamic range of the full-frame sensor for cinematic results. The Sigma fp records high-resolution 4K UHD video with various frame rates. While 4K is sufficient for many professional applications, the BF provides a higher resolution ceiling. If your workflow demands maximum detail in video files or extensive post-production grading flexibility, the BF’s 6K output is the superior choice. The fp remains a capable tool, but the BF leads in raw video resolution.
Size and weight
Portability is a key differentiator. The Sigma fp is exceptionally compact, measuring 1.73 x 1.1 x 2.76 inches and weighing 1.4 pounds. This small footprint makes it ideal for on-the-go shooting and travel. The Sigma BF is significantly larger and heavier. Its dimensions are listed as 9.1 inches in width, height, and length, with a weight of 9.1 pounds. This substantial size reflects its unibody construction. If you prioritize carrying a camera that fits easily into small bags or pockets, the fp is the clear winner. The BF is a much more substantial piece of equipment.
Color modes
Creative expression is handled differently by each camera. The Sigma BF offers thirteen different color modes to open up new avenues of creativity. These range from unique options like Teal and Orange, Powder Blue, and Warm Gold to versatile options such as Rich and Calm. This extensive library allows for immediate stylistic choices in-camera. The provided data for the Sigma fp does not list specific built-in color modes. It emphasizes superb image quality and vibrant colors from its sensor, but lacks the explicit variety of preset creative profiles found in the BF. If you want immediate, diverse creative looks, the BF provides more options.
Which Sigma camera suits your needs
Photographers wanting a complete ready-to-use kit
The Sigma fp bundle includes the 45mm f/2.8 lens, giving you a complete system immediately. You get a 24.6MP sensor and 4K UHD video recording. The compact body weighs just 1.4 pounds, making it easy to carry. This setup is ideal if you want to start shooting without buying additional glass separately.
Creators seeking high-resolution video capabilities
The Sigma BF records 6K video with L-Log, offering a wider dynamic range for post-production flexibility. Its unibody aluminum construction provides superior rigidity compared to standard bodies. If you prioritize video resolution and structural durability over portability, this body-only option delivers professional-grade imaging performance in a solid chassis.
Shooters needing extreme portability and low light performance
The Sigma fp is exceptionally small, measuring only 1.1 inches in height. It weighs 1.4 pounds, fitting easily into bags. With an ISO range expandable to 102400, you can capture clean images in challenging lighting. The splash-proof design adds reliability for outdoor use, ensuring you are ready for diverse environments.
Users preferring minimalist interfaces and color modes
The Sigma BF features a new interface structure with settings on the live view screen. You can choose from thirteen color modes, including Teal and Orange or Warm Gold. This approach simplifies workflow by reducing menu diving. If you value creative color control and a streamlined shooting experience, this camera fits your style.
The products compared
Sigma BF Full-Frame Mirrorless Camera
Best for: Users prioritizing build rigidity and simplified UI
- Sensor Format
- Full-frame
- Sensor Resolution
- Approximately 24 MP
- Autofocus System
- Dual autofocus
- Video Resolution
- 6K
- Configuration
- Body Only
- Color
- Black
View on Amazon: Sigma BF Full-Frame Mirrorless Camera Affiliate link
The Sigma BF is a full-frame mirrorless camera body with a 6K video resolution. It features a unibody aluminum construction carved from a single block. The interface places main settings on the live view screen for intuitive use. You get thirteen color modes for creative control. This body-only model suits photographers who prioritize build quality and a simplified workflow over complex menu diving.
Pros
- Full-frame sensor with 6K video recording capability
- True unibody aluminum structure for high rigidity
- Simplified UI with primary settings on the live view screen
- Thirteen distinct color modes available for shooting
Cons
- Weight is listed as 9.1 pounds, which is exceptionally heavy for a camera body
- Dimensions listed as 9.1 inches wide and high, suggesting a bulky form factor
- Sold as a body only, requiring separate lens purchase
Good fit if
- You value a solid, unibody aluminum construction over lightweight portability
- You want a simplified shooting interface with settings on the live view screen
- You need 6K video resolution with L-Log support
Skip if
- You need a lightweight camera for travel or long handheld sessions
- You are looking for a complete kit with a lens included
- You prefer a traditional menu system over live view settings
Verdict: Sigma BF Full-Frame Mirrorless Camera Body is a heavy, rigid tool for photographers who prioritize build quality and a simplified interface. It fits those who do not mind the bulk for the sake of durability and direct control.
Sigma fp with 45mm f/2.8 Lens
Best for: compact full-frame photography and video
- Sensor Format
- Full-Frame
- Sensor Resolution
- 24.6MP
- Video Resolution
- 4K UHD
- ISO Sensitivity
- Expandable up to 102400
- Color
- Black
- Aperture
- f/2.8
View on Amazon: Sigma fp with 45mm f/2.8 Lens Affiliate link
The Sigma fp is a compact full-frame mirrorless camera bundled with a 45mm f/2.8 lens. It features a 24.6MP sensor and records 4K UHD video. The body is lightweight at 1.4 pounds and measures 2.76 x 1.73 x 1.1 inches. You get an ISO range expandable to 102400 for low-light work. This setup suits photographers who prioritize portability and a versatile focal length for everyday shooting.
Pros
- 24.6MP full-frame CMOS sensor for high detail
- Compact dimensions of 2.76 x 1.73 x 1.1 inches
- Lightweight 1.4-pound body for easy carrying
- 4K UHD video recording capability
- ISO sensitivity expandable up to 102400
Cons
- Low 24.6MP resolution compared to newer high-megapixel models
- Small 1.4-pound body may feel less substantial in hand
- Bundled lens is a fixed 45mm focal length
Good fit if
- You need a lightweight camera for travel
- You prefer a compact full-frame sensor
- You want 4K video in a small package
Skip if
- You require high-resolution stills over 24MP
- You need a versatile zoom lens range
- You prefer a larger, more robust body
Verdict: The Sigma fp with 45mm f/2.8 Lens is a compact tool for shooters who value portability and clean low-light performance. It fits those who want a small full-frame body without the bulk of larger systems.
Specifications side by side
| Spec | Sigma BF Full-Frame Mirrorless Camera | Sigma fp with 45mm f/2.8 Lens |
|---|---|---|
| Sensor Format | Full-frame | Full-Frame |
| Sensor Resolution | Approximately 24 MP | 24.6MP |
| Autofocus System | Dual autofocus | not stated |
| Video Resolution | 6K | 4K UHD |
| ISO Sensitivity | not stated | Expandable up to 102400 |
| Configuration | Body Only | not stated |
| Color | Black | Black |
| Aperture | not stated | f/2.8 |
| Focus Type | Autofocus | not stated |
| Dimensions | 9.1 × 9.1 × 9.1 inches | 2.76 × 1.73 × 1.1 inches |
| Weight | 9.1 pounds | 1.4 pounds |
| Size | 3.00 | 2.76 x 1.73 x 1.1 inches |
| Model | BF | 937317 |
Frequently asked questions
Is the Sigma BF too heavy for travel?
The Sigma BF is significantly bulkier than the fp. It weighs 9.1 pounds and measures 9.1 inches in each dimension. This makes it a rigid tool rather than a portable companion. You should choose the fp if you need a compact full-frame system. The fp kit weighs just 1.4 pounds and fits in smaller bags.
Does the Sigma fp come with a lens?
Yes, the Sigma fp bundle includes the 45mm f/2.8 Contemporary DG DN lens. This provides you with a complete imaging system out of the box. The Sigma BF is sold as a body only configuration. You will need to purchase a separate lens to use the BF. The fp setup is ready for immediate use.
Which Sigma model is better for low light?
The Sigma fp with 45mm f/2.8 lens is designed for clean low-light performance. Its compact body allows for discreet shooting in challenging environments. The 45mm f/2.8 aperture gathers ample light. The Sigma BF prioritizes build rigidity over low-light specific features. Both use full-frame sensors, but the fp kit offers a complete low-light ready solution.
What is the size difference between the two?
The size difference is substantial. The Sigma BF measures 9.1 inches wide, high, and long. The Sigma fp kit is much smaller at 2.76 inches by 1.73 inches by 1.1 inches. This makes the fp highly portable. The BF is a heavy, rigid tool that does not prioritize small form factors. You should consider your carrying needs.
Can I use L-mount lenses on both?
Yes, both cameras use the L-mount system. This gives you broad lens compatibility across both models. You can swap lenses between the BF and the fp. The fp bundle includes a 45mm f/2.8 lens for immediate use. The BF body only requires you to attach your preferred L-mount lens separately. The mount system is consistent.
Which is better for users who want direct control?
The Sigma BF is built for photographers who prioritize direct control and a simplified interface. It offers a rigid build for durability. The fp focuses on compactness and portability. If you prefer a simplified UI and robust handling, the BF fits your needs. The fp is better for those valuing small size and clean video capabilities.