Buying a full spectrum camera is a different proposition to buying a standard camera. You're not just choosing a sensor and a set of features — you're choosing a converted instrument that will open up wavelengths of light invisible to the human eye. Get it right and you'll have one of the most versatile imaging tools available. Get it wrong and you could end up with a camera that doesn't meet your needs, or worse, a poor-quality conversion that compromises the camera's performance.
This guide walks you through everything you need to consider before buying a full spectrum camera.
1. What Do You Want to Use It For?
Before anything else, be clear about your intended use. Full spectrum cameras serve a wide range of purposes, and your use case will influence almost every other decision in this guide.
- Infrared landscape and fine art photography — prioritise image quality, resolution, and dynamic range
- Astrophotography — prioritise low-light performance and video capability
- Scientific and UV imaging — prioritise sensor sensitivity, lens compatibility with UV-transparent optics, and resolution
- Wildlife photography — prioritise autofocus speed, burst rate, and in-body stabilisation
- Versatile everyday use — prioritise a camera that performs well across multiple filter types and can also shoot standard colour photography with an IR cut filter
Many buyers want a camera that can do several of these things. A full spectrum conversion is ideal for this — unlike a dedicated IR or UV conversion, it gives you the flexibility to use different filters for different purposes.
2. Full Frame vs Crop Sensor
The sensor size is one of the most important decisions you'll make. Full-frame sensors offer better low-light performance, greater dynamic range, and shallower depth of field — all of which are valuable in full spectrum photography, where filters often reduce the amount of light reaching the sensor.
Crop sensor cameras (APS-C or Micro Four Thirds) are smaller, lighter, and generally more affordable. They're a perfectly capable choice for many full spectrum applications, particularly if you're on a budget or prioritise portability. However, if you're serious about image quality — particularly for fine art or scientific work — a full-frame camera is worth the investment.
3. Mirrorless vs DSLR
For full spectrum photography, mirrorless cameras have a significant practical advantage over DSLRs: the electronic viewfinder (EVF). When shooting through a dense infrared filter — such as a 720nm or 850nm — a traditional optical viewfinder is essentially useless because the filter blocks too much light to see through. A mirrorless camera's EVF amplifies the live view signal, allowing you to compose and focus accurately regardless of the filter in use.
Mirrorless cameras also tend to be more compact, offer better video features, and have more advanced autofocus systems. For most buyers, mirrorless is the right choice for a full spectrum conversion in 2024 and beyond.
4. In-Body Image Stabilisation (IBIS)
IBIS is particularly valuable for full spectrum work. Infrared and UV filters reduce the light reaching the sensor, often requiring longer exposures. In-body stabilisation allows you to handhold shots that would otherwise require a tripod, giving you much greater flexibility in the field. If you're choosing between two otherwise similar cameras, the one with IBIS is almost always the better choice for full spectrum use.
5. Low-Light and High-ISO Performance
If you intend to use your full spectrum camera for near-infrared night vision, paranormal investigation, astrophotography or any low-light application, pay close attention to the camera's high-ISO performance. Some cameras — particularly those in the Sony A7S series — are specifically optimised for low-light imaging and offer exceptional results at high ISOs. Others prioritise resolution over sensitivity.
6. Lens Mount and Ecosystem
The lens mount determines which lenses you can use natively and which require adapters. For full spectrum photography, lens compatibility is particularly important for two reasons:
- UV photography requires lenses that transmit UV light. Many modern lenses with multi-element, multi-coated designs absorb UV, making them unsuitable. Older, simpler lenses — particularly vintage glass — often perform better for UV work. A lens mount with good adapter support gives you access to a wide range of vintage optics.
- Infrared hotspot — some lenses produce a bright central hotspot in infrared images due to internal reflections. This is a known issue with certain lens designs and is worth researching for any lens you plan to use regularly for IR work.
Sony E-mount, Nikon Z, and Canon RF all offer excellent native lens ecosystems and strong adapter support for vintage glass.
7. Video Capability
If you intend to shoot video — for night sky footage, nature documentaries, or creative projects — check the camera's video specifications carefully. Look for at least 4K recording, good rolling shutter performance, and ideally log or RAW video output for maximum flexibility in post-processing. Many modern mirrorless cameras offer excellent video alongside strong stills performance.
8. The Quality of the Conversion
This is arguably the most important factor of all, and it's one that's easy to overlook when comparing camera specifications. A full spectrum conversion involves disassembling the camera, removing or replacing the internal IR cut filter, and reassembling the camera with precision. A poorly executed conversion can result in:
- Front or back focus errors (the camera no longer focuses accurately)
- Dust or debris on the sensor
- Damaged components or ribbon cables
- Loss of weather sealing
- Reduced or non-functional autofocus
Always buy from a reputable converter with a proven track record, clear warranty terms, and verifiable customer reviews. Ask whether the converted camera has been focus-calibrated and sensor-cleaned before dispatch. A quality conversion should be indistinguishable from the original camera in terms of handling and functionality — with the addition of full spectrum sensitivity.
9. New vs Pre-Owned Base Camera
Full spectrum conversions are available on both new and pre-owned cameras. A pre-owned base camera can significantly reduce the overall cost while still delivering excellent results — particularly for older models that are well-proven for full spectrum work. Ensure any pre-owned camera used as the base for a conversion is in good working order before the conversion takes place.
10. Budget Considerations
Full spectrum cameras represent an investment, and it's worth thinking about the total cost of ownership rather than just the upfront price. Factor in:
- The cost of the converted camera itself
- Filters — you'll likely want at least two or three (IR cut, 590nm, and 720nm as a starter kit)
- An IR illuminator if you plan to shoot in low light or darkness
- Lenses, if you don't already have compatible glass
A mid-range full spectrum converted camera with a small filter kit is a far more capable and versatile tool than a high-end standard camera for the specific applications full spectrum imaging serves.
Summary: What to Look For
To summarise, the key factors to consider when buying a full spectrum camera are: your intended use case, sensor size (full frame vs crop), mirrorless vs DSLR, IBIS, low-light performance, lens ecosystem, video capability, and — above all — the quality and reputation of the conversion. Get these right and you'll have a camera that opens up a world of imaging possibilities that simply aren't available with any standard camera.
Browse our range of professionally converted full spectrum cameras and get in touch if you need advice on choosing the right model for your needs.