Plan achromatic objectives correct for two optical aberrations simultaneously: chromatic aberration (color fringing) and field curvature (the tendency for the center of the field to be in focus while edges are blurry, or vice versa). The result is a flat, sharp, color-accurate field edge-to-edge — a meaningful improvement over standard achromatic objectives for anyone who scans slides at low power or documents images. The VEE GEE Scientific Vanguard 1300 Series Brightfield Microscopes (1321BRi binocular; 1331BRi trinocular) bring plan achromatic optics to a clinical and research-grade compound microscope platform. The trinocular head on the 1331BRi adds a third optical port for digital camera attachment, enabling simultaneous visual observation and image capture without swapping eyepieces — the configuration required for teaching demonstrations and photomicrography workflows. Both models share the same 20W variable quartz halogen illumination with field diaphragm for Koehler illumination, 10X WideField eyepieces, and 5-year warranty. Features and Benefits Plan Achromatic Objectives — Flat Field, Edge to Edge: Plan achromatic correction eliminates field curvature — the entire field is in focus simultaneously, not just the center. Critical for accurate image documentation and any work where peripheral field detail matters. 5-Year Warranty: VEE GEE Scientific backs the 1300 Series with a 5-year warranty — the same coverage as the 1200 Series entry model, maintained through the full instrument line. Trinocular Option (1331BRi): The third optical port on the 1331BRi accepts a compatible digital camera (1300-CDPC-2/5/12) for simultaneous visual and digital capture — essential for teaching, case documentation, and photomicrography without disrupting the viewing setup. 20W Variable Quartz Halogen + Field Diaphragm: Full Koehler illumination capability — adjust field diaphragm and condenser to achieve optimal contrast and resolution for each specimen type and staining protocol. 4X/10X/40X/100X Plan Achromatic Objectives: Four-objective nosepiece covers full clinical and research range from tissue scanning through oil-immersion cytology, all with plan-corrected flat field. 10X WideField Eyepieces: Broader field of view than standard 10X — reduces slide repositioning during scanning and improves situational awareness of surrounding tissue context. Specifications Property 1321BRi 1331BRi Head Binocular Trinocular Series Vanguard 1300 Objectives 4X, 10X, 40X, 100X Plan Achromatic Eyepieces 10X WideField Illumination 20W variable quartz halogen, field diaphragm, Koehler capable Type Brightfield Camera Port No Yes — third optical port Warranty 5 Years Price $1,642 $1,786 Laboratory Applications Clinical and veterinary diagnostics — urinalysis, hematology, cytology, and histopathology where flat-field plan objectives improve diagnostic confidence at low and high magnification Research and university labs where photomicrography is part of the workflow — plan objectives are required for publication-quality imaging without post-processing field curvature correction Teaching and demonstration use — the 1331BRi trinocular model enables live camera feed to a monitor or projector while the instructor views simultaneously through the eyepieces Any brightfield application upgrading from achromatic objectives where edge sharpness and flat field are limiting factors in current image quality Frequently Asked Questions What is the difference between 1321BRi and 1331BRi?1321BRi is binocular (two eyepieces, no camera port). 1331BRi is trinocular (two eyepieces plus a third port for a digital camera). All other specifications — optics, illumination, objectives, warranty — are identical. Choose 1321BRi for visual-only use; choose 1331BRi if you intend to attach a digital camera for documentation or teaching. What is the difference between achromatic (1220CM) and plan achromatic (1321BRi/1331BRi) objectives?Achromatic objectives correct for chromatic aberration (color fringing) in the center of the field but allow field curvature at the edges. Plan achromatic objectives additionally correct for field curvature — the entire field is in focus, not just the center. For high-magnification clinical work and image documentation, plan achromatic optics produce noticeably better results. Does the 1331BRi camera port work simultaneously with the eyepieces?Yes — the trinocular head splits the optical path between the eyepieces and the camera port. Both are active simultaneously. The image split ratio varies by manufacturer (typically 80/20 or 50/50 between eyepieces and camera port). Confirm with VEE GEE Scientific for exact split specification. Quality Assurance VEE GEE Scientific Vanguard 1300 Series microscopes are manufactured with factory-aligned plan achromatic objectives and verified illumination systems. The trinocular camera port on the 1331BRi is optically aligned to the eyepiece path at the factory. 5-year warranty covers optics, mechanics, and illumination. Academic and Institutional Pricing LabSupplies.com offers tiered quantity pricing for educational institutions, veterinary clinics, and research organizations. As an authorized VEE GEE Scientific dealer, we ship directly from USA inventory.
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