🇬🇧 UK-focused, independent microscopy advice. Plankton & Zoom is an independent review and comparison site. We do not sell, resell or broker microscope quotes. We link to authorised UK distributors and manufacturers so you can compare current specifications, tiers and support options.
What is a confocal Microscope?
confocal microscope uses a pinhole aperture to block out-of-focus light, producing optical sections with much higher contrast than a conventional widefield fluorescence microscope. By scanning a focused laser point across the specimen and collecting emitted light through the pinhole, confocal systems let researchers build 3D reconstructions from Z-stacks, image thicker specimens and perform precise co-localisation studies.
Typical applications include:
- 3D cell culture and spheroid imaging
- Thick tissue sections and organoids
- Live cell time-lapse with reduced phototoxicity
- Co-localisation and FRET/FISH studies
- High-content screening
Confocal vs Widefield Fluorescence
| Feature | Confocal | Widefield Fluorescence |
|---|
| Optical sectioning | ✅ Pinhole removes out-of-focus blur | ❌ Blur from above/below focal plane |
| 3D reconstruction | ✅ High-quality Z-stack models | ⚠️ Limited depth discrimination |
| Signal-to-noise | ✅ Excellent background rejection | ⚠️ Good but background limited |
| Speed | ⚠️ Point-scanning is slower | ✅ Fast widefield capture |
| () | Entry | Entry |
tiers are UK bands. Always confirm current tiering, delivery and support directly with the manufacturer or an authorised UK distributor.
Entry-Level Confocal Alternative: EVOS M7000
EVOS M7000 — Automated Z-Stack & Deconvolution Imaging
Inverted • 4-channel fluorescence • Automated stage • LED illumination • Z-stack • Deconvolution
Before committing to a laser scanning confocal, many UK labs consider whether a deconvolution-based system will meet their needs. The EVOS M7000 captures Z-stacks through a fluorescent specimen and applies computational deconvolution to remove out-of-focus blur. It is not true confocal, but for thin monolayers, multiwell assays and high-content screening it can deliver acceptable optical sectioning at a much Lower tier.
- Z-stack acquisition for 3D reconstruction
- Automated multiwell plate scanning
- Deconvolution improves apparent sectioning
- LED illumination — no laser safety training required
EVOS M7000 Z-Stack Guide
View on Thermo Fisher UK →
Z-Stack
Deconvolution
No Laser Safety
Laser Scanning and Spinning Disk Confocal Systems for UK Labs
Leica TCS SP8 — Research Laser Scanning Confocal
Multiple laser lines • AOBS • HyD detectors • STED super-resolution option • Live cell chamber compatibility
The Leica TCS SP8 is widely used in UK university core facilities. The Acousto-Optical Beam Splitter (AOBS) removes the need for mechanical filter wheels, HyD detectors deliver high photon-counting sensitivity, and an optional STED module pushes resolution below the diffraction limit. It is a flexible platform that can be configured for live cell, fixed specimen and super-resolution work.
View on Leica UK →
Zeiss LSM 900 with Airyscan 2 — Resolution-Focused Confocal
Airyscan 2 detector • Multiple laser lines • GaAsP detectors • Incubator integration option
The Zeiss LSM 900 with Airyscan 2 improves resolution by up to 1.7x without the complexity of a dedicated super-resolution system. This makes it attractive for live cell confocal where phototoxicity and acquisition speed matter. Its compact footprint also suits smaller core labs and shared facilities.
View on Zeiss UK →
Nikon CSU-W1 — Spinning Disk Confocal
Nipkow spinning disk • sCMOS/EMCCD camera • Large field of view • High-speed live cell imaging
Spinning disk confocal uses a disk with thousands of pinholes to scan the field simultaneously, making it 10–50x faster than a laser scanning confocal. The Nikon CSU-W1 is a popular choice in UK labs studying fast live cell dynamics such as calcium signalling, microtubule tracking and vesicle transport.
View on Nikon →
Choosing the Right Confocal Platform
When to choose laser scanning confocal
Choose a laser scanning confocal if you need the best possible optical sectioning, quantitative intensity measurements, flexible spectral detection, or super-resolution options. These systems are the standard for fixed tissue, fixed-cell co-localisation and demanding 3D reconstruction.
When to choose spinning disk confocal
Choose spinning disk if you are imaging fast biological events in living cells. Because it captures the whole field at once, it exposes the sample to less total light for the same frame rate, reducing phototoxicity during long time-lapse experiments.
When to consider a deconvolution alternative
If your specimens are thin monolayers or multiwell plate cultures and you mostly need sharper images for counting, confluence or basic GFP validation, a deconvolution system such as the EVOS M7000 may be sufficient. It is far cheaper, requires no laser safety training and fits inside standard biosafety cabinets.
Frequently Asked Questions
What does a confocal microscope do that a normal fluorescence microscope cannot?
a confocal microscope uses a pinhole to block out-of-focus light, producing optical sections with high contrast. This lets you build 3D reconstructions from Z-stacks and study thick specimens such as tissues, organoids and 3D cell cultures.
What is the UK tier for a confocal microscope?
Entry-level laser scanning confocal systems in the UK typically fall into the Premium tier. Mid-range research systems are often Premium to high-end, while platforms with super-resolution sit in the high-end tier and above. Spinning disk systems are usually Mid-range to Premium. Deconvolution alternatives such as the EVOS M7000 sit in the Mid-range to Premium tier but do not provide true confocal sectioning.
Do I need a laser scanning confocal or is a spinning disk better?
Laser scanning confocals give the best optical sectioning and flexibility but are slower. Spinning disk confocals scan the field simultaneously and are 10–50x faster, making them better for live cell dynamics such as calcium imaging and microtubule tracking.
Can the EVOS M7000 replace a confocal microscope?
For some applications, yes. The EVOS M7000 captures Z-stacks and applies computational deconvolution to reduce out-of-focus blur. It is not true confocal, but it is a practical alternative for thin monolayers, multiwell assays and high-content screening where the highest optical sectioning is not essential.
What ongoing tiers come with a confocal microscope?
Expect annual service contracts, laser replacements, objective maintenance, software licence renewals and possibly a dedicated room with environmental stability. Some UK core facilities budget 8–12% of the purchase level per year for support and consumables.
Related Guides
confocal microscope UK
laser scanning confocal
spinning disk confocal
Leica TCS SP8
Zeiss LSM 900
Nikon CSU-W1
EVOS M7000