Description
EMZ-5TRH: Trinocular Microscope Head
EMZ-5TRH: Microscope Head
The EMZ-5TRH is a new and improved high eyepoint model with an eye relief of 20.9mm designed for microscopists and for people who wear glasses. It is specially designed to give the user more clearance between their eyes and the microscope. The high eyepoint models also uses a newly designed eyepiece with a wider designed lens to compliment the high eyepoint model optional eyepieces for this model: MA522 10X, MA818/2 15X, MA819/2 20X. Optional rubber eye guards (MA906 – each) are also available.
The EMZ-5TRH trinocular zoom body is used for photography and video applications. When the beamsplitter is engaged, 100% of the light from the left optical path is directed to the phototube. The image can still be viewed through the right eyetube. The EMZ-5TRH employs Greenough optics for improved image flatness and contrast.
It offers high resolution erect unreversed stereoscopic images. In addition to its compact design and versatility, a wide variety of auxiliary lenses and stands are available to allow the user to customize their desired working distance to adapt to almost any application. Photomicrography is made easy with over 300 available digital, analog and SLR camera adapters. Also suitable for eyeglass users.
EMZ-5TRH: Microscope Head

The EMZ‑5TRH Trinocular Zoom Stereo Head is a precision-engineered trinocular microscope zoom body designed for demanding lab and industrial imaging applications. Featuring a 0.7×–4.5× zoom range that delivers approximately 7×–45× magnification with 10× eyepieces, it provides crisp, high-resolution stereoscopic views with excellent contrast and depth. Built with a Greenough optical design and a generous 93 mm working distance, this modular body accommodates a wide range of auxiliary lenses and accessories for customized setups. The high eyepoint capability is ideal for eyeglass wearers and extended observation sessions, while the trinocular port enables seamless integration with cameras or imaging systems for documentation and analysis.
Body: Trinocular, Rotatable 360°, Cast Aluminum Alloy Construction
Trinocular Port: 23.2mm I.D, 25.2mm O.D
Zoom Ratio: 6.5:1
Zoom Range: 0.7x – 4.5x
Zoom Knobs Markings: 0.7, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5
Zoom Control: Dual, graduated, bilateral
Magnification: 7x – 45x (10x eyepieces)
Objective Lens: Brass Construction
Field of View: 32mm – 5.1mm
Working distance: 93mm
Eyetube Inclination: 45°
Eyepieces: High Eyepoint 10x, (MA522- Paired) (required – not included)
Interpupillary Distance: 54mm – 75mm
Dioptric Adjustment: Dual (+/- 5 diopters)
Extended Mag Range: 2.1x – 270x (With optional auxiliary lenses and eyepieces)
Extended Working Distances: 34mm – 251mm (With optional auxiliary lenses and eyepieces)
Mounting: Fits 84.5mm Diameter Focus Holders
Auxiliary Lenses: MA517 – 0.5x W.D. 150mm (5.9″), MA526 – 0.75x W.D. 97mm (3.8″), MA507 – 1.5x W.D. 49mm (1.9″), and MA511 – 2x W.D. 34mm (1.3″) (optional)










































