ECLIPSE FN1
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Overview
The Nikon ECLIPSE FN1 is a purpose-built upright microscope designed specifically for demanding electrophysiology (patch‑clamp) experiments. Its streamlined, low-profile design ensures unobstructed access for microelectrodes, while long working distance objectives enable clear visualization of deep regions in thick biological specimens. By leveraging infrared (IR) DIC optics, the FN1 can resolve fine structures at depths that conventional visible-light systems struggle with. The system also minimizes noise — both electrical and vibrational — to help maintain signal fidelity during sensitive recordings. With a sliding nosepiece that safely lifts objectives when changing magnification, the FN1 protects delicate optics and chamber setups, and its ergonomic placement of the focus knob and field diaphragm ring makes critical adjustments more accessible, even in tightly confined setups. For flexibility, the microscope supports modular height adjustment (via spacer), removable substage/turret, and a variety of condensers, making it suitable for a wide range of experimental configurations.
Specifications
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Optical System
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Uses Nikon’s CFI60 and CFI75 infinity-corrected optics
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Main Body / Stand
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I-shaped frame with an external power supply
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Focusing
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Focus achieved by moving the objective up/down on the nosepiece
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Manual coaxial coarse and fine focus knobs (on both sides)
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Nosepiece / Objective Holder
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CFI60: Sliding nosepiece (FN‑S2N) with 2 front/back positions; DIC prism attachable
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CFI75: Single objective holder (FN‑MN‑N), also DIC-prism compatible
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Objectives (examples)
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CFI Plan 4×, NA 0.10, W.D. 30 mm (*auxiliary lens required)
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CFI Plan Fluor 10× W, NA 0.30, W.D. 3.5 mm
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CFI75 LWD 16× W, NA 0.80, W.D. 3.0 mm
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CFI Apochromat NIR 40× W, NA 0.80, W.D. 3.5 mm
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CFI Apochromat NIR 60× W, NA 1.00, W.D. 2.8 mm
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CFI Plan 100× XC W, NA 1.10, W.D. 2.5 mm (with correction ring)
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Condenser
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Universal turret-type long working distance (LWD) condenser: NA 0.78, W.D. 7.2 mm
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Supports DIC and oblique light observations
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Eyepieces
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10× standard eyepiece, field of view (FOV): 22 mm
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UW10× (ultra-wide) eyepiece, FOV: 25 mm
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Eyepiece Tubes / Trinocular Options
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Ergonomic binocular tube (C-TE2) — 100% eyepiece or split between eyepiece and digital (DSC) port (50:50)
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Trinocular tube F (C-TF) — 100% photo port / 100% eyepiece, depending on setting
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Trinocular tube T (C-TT) — several port divisions, e.g., 20:80 eyepiece:photo
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LV‑TI3 Trinocular ESD (electrostatic-discharge designed), and LV‑TT2 Tilting Trinocular also available
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Stage
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3-plate mechanical stage (FN-3PS2)
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Travel (stroke): 30 mm in X and Y directions
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Illumination / Light Source
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High‑stability fiber-illuminated Intensilight HG pre-centered 130 W mercury lamp
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Optional 100 W Hg lamphouse
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Optional FN‑LH lamphouse: 12 V, 100 W long-life halogen lamp
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Operating Conditions
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Temperature range: +10 °C to +40 °C
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Humidity: up to 85% RH (no condensation)
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Weight
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Approx. 12 kg (main body)
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Other Features
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Long working distance objectives and up to 45° approach angle make electrode placement easier.
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Sliding nosepiece lets the objective retract (up to ~15 mm) when changing magnification, preventing collision with manipulator or chamber.
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Noise reduction: fiber illumination and ground pin connections help reduce electrical noise; structural rigidity minimizes vibration.
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Adjustable height: by inserting a spacer between body and arm, the microscope height can be raised by 10–30 mm to accommodate larger experimental setups.
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Removable condenser, turret, and substage provide space flexibility for custom experimental configurations.
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You can find complete, updated details on the manufacturer’s website:
[Visit Nikon official product page]
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Product information sourced from Nikon Microscopes. All trademarks are the property of their respective owners.
