# Zoom Telephoto Optics Medical Optical Meniscus Lenses in Stock

> Zoom Telephoto Optics Medical Optical Meniscus Lenses in Stock — an optical lens: Optical Glass, as Required thick, HMC. Specs, RFQ checklist and custom…

- Page: https://machiningglass.com/products/zoom-telephoto-optics-medical-optical-meniscus-lenses-in-stock/
- SKU: MG-D23A34
- Category: Optical Lenses, Prisms & Mirrors > Precision Optical Lenses
- Image: https://machiningglass.com/wp-content/uploads/2026/10/Zoom-Telephoto-Optics-Medical-Optical-Meniscus-Lenses-in-Stock.webp
- Updated: 2026-10-24

Product type: Meniscus Lens. Application: Lighting, Medical, Optical, Photography. Model: TT Lens 79.

## Overview

The Zoom Telephoto Optics Medical Optical Meniscus Lenses in Stock is supplied as an optical lens made from Optical Glass. Listed geometry: thickness as Required, single-lens shape. Optical / electrical data: transmittance >95%. Coating: HMC; surface quality as Required. Listed for Lighting, Medical, Optical and Photography applications. Dimensions, material grade, coating and finish can be quoted to your drawing; the values above are the listed starting point.

## Specifications

| Parameter | Value |
| --- | --- |
| Material | Optical Glass |
| Type | Meniscus Lens |
| Shape | Single-lens |
| Thickness | as Required |
| Transmittance | >95% |
| Coating | HMC |
| Surface Quality | as Required |
| Usage | Lighting, Medical, Optical, Photography |
| Model NO. | TT Lens 79 |
| Lenses Color | Clear |
| Optical Meniscus Lenses | Meniscus lens specification or based on clients' requirements |
| NML | negative meniscus |
| PML | Positive menisus |
| Supplier | Tianjin Tengteng Optoelectronic Technology Co., Ltd. |

## Technical data

| Parameter | Value |
| --- | --- |
| 1.Material | Domestic or foreign materials are selected based on clients' requests |
| 2.Diameter tolerance | 0/-0.01mm |
| 3.Clear aperture | 90%-100% |
| 4.Tolerance of CT or ET | ±0.02mm |
| 5.Vector Tolerance | ±0.015mm |
| 6.Aperture Tolerance | ±0.02mm |
| 7.Surface Quality | US Standard 10-5,ISO Standard 3X0.063 |
| 8.Curvature Tolerance | ±1.5Lambda |
| 10.Centration | 1 arc minute |
| 11.Focal Length | ±1% |
| 12.Edge Chip | <0.1mm |
| 13.Bevel | Based on clients' requests |
| 14.Coating | Apply AR or based on client requests |

|   |   |   |   |   |   |   |   |   |   |   |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| No. | Dia.(mm) | EFL(mm) | BFL(mm) | R1(mm) | R2(mm) | CT(mm) | ET(mm) | CA(mm) | NA | F# |
| NML-1254-0100 | 25.4 | -99.60 | -96.51 | 33.70 | 100.0 | 3.0 | 4.67 | 22.86 | -11.90 | -3.92 |
| NML-1254-0125 | 25.4 | -124.50 | -121.13 | 38.82 | 100.0 | 3.0 | 4.33 | 22.86 | -14.88 | -4.90 |
| NML-1254-0150 | 25.4 | -148.80 | -145.17 | 43.10 | 100.0 | 3.0 | 4.10 | 22.86 | -17.78 | -5.85 |
| NML-1254-0250 | 25.4 | -248.20 | -243.58 | 55.70 | 100.0 | 3.0 | 3.66 | 22.86 | -29.67 | -9.77 |
| NML-1254-0200 | 25.4 | -198.50 | -194.37 | 50.20 | 100.0 | 3.0 | 3.82 | 22.86 | -23.73 | -7.81 |
| NML-1254-0300 | 25.4 | -297.90 | -294.67 | 95.10 | 250.0 | 3.0 | 3.53 | 22.86 | -35.62 | -11.73 |
| NML-1254-0355 | 25.4 | -356.70 | -353.07 | 102.71 | 233.2 | 3.0 | 3.44 | 22.86 | -42.65 | -14.04 |
| NML-1254-0400 | 25.4 | -399.50 | -395.82 | 112.85 | 250.1 | 3.0 | 3.39 | 22.86 | -47.77 | -15.73 |
| NML-1254-0495 | 25.4 | -496.30 | -492.19 | 126.30 | 250.0 | 3.0 | 3.32 | 22.86 | -59.34 | -19.54 |

|   |   |   |   |   |   |   |   |   |   |   |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| No. | Dia.(mm) | EFL(mm) | BFL(mm) | R1(mm) | R2(mm) | CT(mm) | ET(mm) | CA(mm) | NA | F# |
| PML-1254-0100 | 25.4 | 99.20 | 97.69 | 82.40 | 32.1 | 3.6 | 1.96 | 22.86 | 11.86 | 3.90 |
| PML-1254-0125 | 25.4 | 124.00 | 122.62 | 106.85 | 40.6 | 3.3 | 1.98 | 22.86 | 14.82 | 4.88 |
| PML-1254-0150 | 25.4 | 148.50 | 147.27 | 130.92 | 48.9 | 3.1 | 1.99 | 22.86 | 17.75 | 5.84 |
| PML-1254-0200 | 25.4 | 197.90 | 196.74 | 183.00 | 66.1 | 3.0 | 2.21 | 22.86 | 23.66 | 7.79 |
| PML-1254-0295 | 25.4 | 296.90 | 296.01 | 290.40 | 100.9 | 2.5 | 2.00 | 22.86 | 35.50 | 11.69 |
| PML-1508-0100 | 50.8 | 99.60 | 94.53 | 65.76 | 30.4 | 9.7 | 1.09 | 45.72 | 5.95 | 1.96 |
| PML-1508-0150 | 50.8 | 148.60 | 145.41 | 119.40 | 47.8 | 7.3 | 2.72 | 45.72 | 8.88 | 2.92 |
| PML-1508-0200 | 50.8 | 197.90 | 195.38 | 171.56 | 65.0 | 6.2 | 2.90 | 45.72 | 11.83 | 3.89 |
| PML-1508-0250 | 50.8 | 248.70 | 246.58 | 224.90 | 82.7 | 5.5 | 2.97 | 45.72 | 14.87 | 4.90 |
| PML-1508-0300 | 50.8 | 298.10 | 296.14 | 279.10 | 100.1 | 5.1 | 2.98 | 45.72 | 17.82 | 5.87 |

## What to specify when you request a quote

- **Material** — listed as “Optical Glass”; name the glass or crystal.
- **Geometry** — give diameter, focal length or radii, angles and tolerances.
- **Surface figure** — listed as “as Required”; quote surface figure (λ) and scratch-dig.
- **Centring and edges** — state centration and edge chamfer.
- **Coating** — listed as “HMC”; list the band and reflectance or transmission target.

## Engineering guides for this part

For material grades and coating options, see [Fused Silica and Other Glass Materials for Machined Components](https://machiningglass.com/materials/fused-silica-and-other-glass-materials-for-machined-components/). How parts like this are machined and finished is covered in [Flat Glass Polishing Process for Precision Substrates](https://machiningglass.com/capabilities/flat-glass-polishing-process-for-precision-substrates/). For an application example, read [Fused Silica Glass Wafers for Precision Appliance Electronics](https://machiningglass.com/applications/fused-silica-glass-wafers-for-precision-appliance-electronics/). Before sending a drawing, check [Fused Silica Refractive Index: Key to Optical Design Improvement](https://machiningglass.com/resources/fused-silica-refractive-index-key-to-optical-design-improvement/). A related standard product is [Fused Silica Glass Wafers (2–12", JGS1/JGS2)](https://machiningglass.com/products/fused-silica-glass-wafers-2-12-jgs1-jgs2/).

## FAQ

### What is the Zoom Telephoto Optics Medical Optical Meniscus Lenses in Stock made of?

It is listed as Optical Glass. Coating: HMC. Other grades can be quoted if your application needs different transmission, thermal or chemical properties.

### What sizes and thicknesses are available?

The listing gives thickness as Required. Custom outlines and thicknesses are made to drawing; state the tolerance you need.

### What optical or electrical performance does it have?

Listed values: transmittance >95%. Confirm the values at your operating wavelength, angle and temperature when you request a quote.

### Where is this optical lens used?

Listed applications: Lighting, Medical, Optical and Photography.

### What should I include in a quote request?

Include material, geometry, surface figure, centring and edges and coating, plus quantity and a drawing if the part is custom.

## Request a quote

Send drawings, tolerances and quantity: https://machiningglass.com/contact/?rfq_product_id=17025#mg-rfq

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Source: Custom Precision Glass Machining — https://machiningglass.com/