マシンビジョンシステム用Cマウントレンズ

Industrial optics for cameras with sensors from 1/4" to 1.2" format. All lenses in stock at our US warehouse with same-day shipping.

Cマウントレンズは、品質検査、ITS交通監視、ロボット工学、および自動化システムに適しています。 4~75mmの焦点距離と調整可能な絞りにより、センサーのフォーマットや被写界深度を 各用途に合わせて最適化できます。

焦点距離 4~75mm
センサーの検知範囲 1/4インチ~1.2インチ
解像度 5~25MP
マシンビジョンシステム用Cマウントレンズ

マシンビジョンにおいてCマウントレンズが優れている理由

Machine vision systems operate at specific working distances: inspecting parts on conveyors at 500mm, scanning barcodes at 300mm, or monitoring traffic at 10-20 meters. The C-mount thread says nothing about which conjugate a lens is corrected for, so that has to come from the datasheet. The Commonlands machine vision lenses in this collection are corrected for those finite working distances rather than for infinity alone, which is what buys sharper images, more accurate measurements, and better defect detection than a photographic lens optimized for distant subjects. Other C-mount products, surveillance, varifocal, and dedicated macro designs among them, are optimized elsewhere, so check the conjugate before you specify.

The key advantage of C-mount lenses is the adjustable aperture (iris ring), which gives you direct control over depth of field. Stopping down the iris increases depth of field so more of the scene is in focus, which is critical for inspecting parts with varying heights or reading codes on uneven surfaces. In machine vision this tradeoff is practical: reducing the aperture cuts light throughput, but illumination levels can be controlled programmatically with structured lighting, LED ring lights, or backlight arrays. Fast maximum apertures (F/1.4–F/2.0) still provide high light throughput when you need short exposure times for high-speed capture. Combined with image circles that cover sensors from 1/4" to 1.2", these lenses supply the optical half of a reliable industrial vision system. Shutter architecture is the other half and belongs to the sensor: a global shutter exposes every row over the same interval, which is what removes the skew a rolling shutter puts on fast-moving objects. The lens mount has no bearing on it, so choose the shutter on the camera and the image circle on the lens.

Cマウントレンズとは何ですか?

Cマウントは、1"-32 UNネジと17.526mmのフランジ焦点距離を特徴とする、業界標準のレンズマウントシステムです。もともと16mmフィルムカメラ向けに開発されましたが、1/4"から1.2"フォーマットのセンサーに対応しつつ、コンパクトで再現性の高い機械的接続を維持できるため、産業用マシンビジョン分野において主流のインターフェースとなりました。

The thread and flange are common to every C-mount product, so a C-mount lens from one maker threads onto a C-mount camera from another. Basler, FLIR, Allied Vision, IDS, Teledyne DALSA, and others all build to this standard. Threading on is not the whole compatibility question: rear-element intrusion into the camera throat, clearance around the sensor filter, focus travel, cover-glass thickness, image circle against sensor diagonal, and spectral and chief ray angle behavior stay specific to the lens and the camera.

The shared flange distance gives every lens the same nominal starting point when you swap focal lengths on a production line, which shortens the changeover. It is a starting point rather than a calibration: each lens carries its own focal tolerance, focus setting, and principal-plane locations, and each camera its own registration and sensor stack, so plan on refocusing and re-verifying calibration after a swap.

Cマウントレンズは、CSマウント(同じネジ山を使用するが、フランジ距離が12.526mmと短い)とは異なります。Cマウントレンズは、5mmのスペーサーリングを使用すればCSマウントカメラに取り付けることができますが、CSマウントレンズはフランジ距離が短いため、Cマウントカメラでは正しくピントを合わせることができないため、使用しないでください。

センサーフォーマット別 Cマウントレンズ - 在庫あり

1/4インチから1.2インチフォーマットのセンサー用撮像光学系 - サンプルはカリフォルニアから当日発送

耐環境型Cマウントレンズ - 米国在庫あり

Enhanced mechanical construction for harsh environments. Shock and vibration performance depends on the test profile, the mount and preload, and the limits you accept after the test, so qualify a specific lens against your own profile - Ships within 24 hours

産業用マシンビジョン向けCマウントレンズ

C-mount lenses are the industry standard for machine vision systems, quality control applications, and industrial automation. With our complete inventory stocked in California, we ship same-day throughout the United States for orders placed before 12 PM PT. This means you get the lenses you need tomorrow, not next week, which is critical when production lines are waiting.

The C-mount standard (1"-32 thread, 17.526mm flange distance) gives one common mechanical interface across the major camera manufacturers including Basler, FLIR, Allied Vision, and IDS. Clearance in the throat, focus travel, cover-glass thickness, and image circle still decide whether a given pairing works. Supporting sensors from 1/4" to 1.2" format, C-mount lenses provide the flexibility to choose the right sensor for your application, from cost-effective 5MP sensors for basic inspection to high-resolution 25MP sensors for detailed measurement tasks. Lenses designed for larger formats will work with smaller sensors, providing a cropped field of view.

What matters for machine vision is the conjugate a lens is corrected for, and that is a design choice rather than something the C-mount standard sets. The machine vision lenses in this collection are corrected for finite working distances, so a camera inspecting parts at 500mm or reading barcodes at 300mm is working where the design is at its best. Fast apertures from F/1.4 to F/2.0 on those designs maximize light throughput, enabling shorter exposure times to freeze motion and reduce blur in high-speed applications. Read the datasheet for any C-mount lens before you specify it: surveillance, varifocal, and macro designs share the mount and are optimized for other conjugates.

Most of the C-mount lenses in this collection have lockable focus and iris rings, which matter when a camera is bolted to vibrating equipment or a moving robot; the product page for each lens says which rings lock. Operating temperature range, coating band, and the pixel pitch a design targets are per-SKU numbers rather than consequences of the mount or of metal construction, so read them off the product page. The ruggedized models carry the widest environmental ratings on the page, several designs target pixel pitches down to 2.2μm, and several carry coatings that cover visible and NIR together, but no single lens is all of those at once by default.

A pixel pitch or a megapixel label names the sensor class a design targets. It is not a measured resolution, so ask for the MTF curve and its conditions, the spatial frequency, aperture, field height, wavelength band, and conjugate, and compare that against your sensor.

CマウントとM12レンズ:用途に応じてどちらのマウントを選ぶべきか?

CマウントとM12は、いずれもマシンビジョン分野で一般的に使用されるレンズマウントですが、それぞれ用途が異なります。両者の違いを以下に示します。

仕様 Cマウント M12(Sマウント)
スレッド1"-32 UN(25.4mm)M12×0.5(12mm)
フランジ間距離17.526mm基準なし(状況により異なる)
最大センサーサイズ1.2"1/6" to 2/3" (up to 1/1.8" typically, with select designs to 2/3")
Sensor resolution class targeted5MP~25MP以上2MP to 16MP; the highest class published for a Commonlands M12 lens is 12-16MP at 1.55µm, on CIL340 and CIL293
焦点距離4mm~75mm0.8mm to 100mm
代表的な開口径F/1.4~F/2.8F/1.6~F/2.8
フォーカス機構Lockable focus ring; internal mechanism varies by designスレッドイン(セット・アンド・ロック)
アイリス制御調整可能なアイリスリング固定絞り
Vibration and shock constructionFocus and iris rings lock; more mass on a longer lever armNo moving rings; low mass, bonded assembly
サイズより大きく、より重い非常にコンパクトで軽量
こんな方に最適マシンビジョン、品質検査、ITS、実験室の自動化ロボティクス、ドローン、組み込みビジョン、ボードカメラ
作動距離製品によって異なりますが、通常は100mm~∞です。Set by lens prescription, holder, and sensor stack, not by the mount; confirm per build with Commonlands engineering
価格帯130ドルから440ドル15ドルから120ドル

For machine vision applications requiring depth-of-field control via an adjustable iris or sensors larger than 1/1.8", C-mount is the better choice. Working distance on its own does not select a mount: M12 telephotos at 50mm, 75mm, and 100mm reach well past 500mm, so size the lens from the field of view and resolution you need at your standoff, then decide on iris control and sensor format. The resolution figures in the table name the sensor class each design targets, so treat them as a shortlist filter and confirm against the MTF data and its conditions on the product page. The vibration row describes construction rather than a rating: shock and vibration performance depends on the test profile, the mount and preload, and the optical and mechanical limits you accept after the test, so qualify the specific lens and holder against your own profile. The adjustable aperture is especially valuable when inspecting objects at varying heights: stop down for more depth of field, and compensate with programmable lighting. For embedded systems, robotics, and compact board cameras where size and weight matter most, M12 lenses (fixed aperture) are the standard. Commonlands stocks both. Browse our M12 lens collection or contact our engineering team for help choosing. If you are also comparing suppliers, our guide to Edmund Optics alternatives for imaging lenses covers where a C-mount lens from a specialist beats a catalog house, and where it does not.

Cマウントに関する技術的なよくある質問

マシンビジョンエンジニアからよく寄せられる質問

マシンビジョンにおいて、なぜM12レンズではなくCマウントレンズを選ぶべきなのでしょうか?
The biggest differentiator is the adjustable iris ring on C-mount lenses, which lets you control depth of field. M12 lenses have a fixed aperture, so you get whatever depth of field the manufacturer chose. With C-mount, you can stop down to increase depth of field for inspecting parts with varying heights, and in machine vision this is practical because illumination can be controlled programmatically (structured lighting, LED arrays). C-mount lenses also cover larger sensors, up to 1.2", including the global-shutter sensors used for fast motion, though the shutter is a camera property rather than anything the mount supplies. They have fast maximum apertures (F/1.4–F/2.0) for high-speed capture, and the machine vision designs in this collection are corrected for the finite working distances (200mm–2000mm) typical in inspection and automation.
Cマウントレンズはどのようなセンサーフォーマットに対応していますか?
C-mount lenses support sensors from 1/4" (4.5mm diagonal) through 1.2". This includes: 1/4", 1/3", 1/2", 1/1.8", 2/3", 1", 1.1", and 1.2". Each lens is designed to fully cover a specific sensor size. Using a lens designed for a smaller sensor will cause dark corners (vignetting) on a larger sensor. However, lenses designed for larger sensors work perfectly with smaller sensors, providing a narrower field of view. The standardized mounting (1"-32 thread, 17.526mm flange distance) means any C-mount lens threads onto any C-mount camera and starts at the same nominal registration; rear-element clearance, focus travel, cover-glass thickness, and image circle still have to be checked for the specific pairing.
マシンビジョンタスクに適した焦点距離は、どのように選べばよいでしょうか?
次の式を使用してください:焦点距離 = (作動距離 × センサー幅) ÷ 視野幅。 例えば、 2/3インチセンサー(幅8.8mm)を搭載した検査用カメラで、500mmの距離から幅200mmの領域を撮影する必要がある場合:f = (500 × 8.8) / 200 = 22mm となるため、25mmのレンズを選択します。 広角レンズ(4~8mm)は、 エリアスキャンやナビゲーションに最適です。標準レンズ(12~25mm)は、一般的な検査や品質 管理に適しています。望遠レンズ(35~75mm)は、詳細な検査や、離れた場所から 微細な特徴を読み取るのに最適です。
5MP、12MP、25MPのレンズバージョンにはどのような違いがありますか?
The rating names the sensor class a lens is designed and toleranced for, not a measured resolving power. A 25MP lens is built to hold usable contrast at the higher spatial frequencies a 25MP sensor of that format samples, and a 5MP lens is not. The label is not a pixel pitch: two 12MP lenses for different formats target different pitches, so ask for the MTF curve with its conditions, the spatial frequency, aperture, field height, wavelength band, and conjugate, and compare that against your sensor. As a practical matter, a 5MP lens on a 25MP sensor leaves resolution on the table, while a 25MP lens on a 5MP sensor costs more without hurting the image.
米国在庫のCマウントレンズは、どのくらいの速さで発送されますか?
All C-mount lenses shown on our website are in stock at our California warehouse and ship same-day for orders placed before 12 PM PT. We offer next-day delivery throughout the United States via FedEx and UPS. Volume orders up to 10,000 units typically ship within 1-3 business days depending on quantity. Free shipping is available for orders over $100. International shipping is available with proper export documentation. Contact us for quotes on delivery to your country.

Cマウントレンズの選び方に関するサポートを受ける

パーソナライズされたレコメンデーションに関する、マシンビジョンへの要件について教えてください