{"product_id":"qhyccd-qhy4040-pro-i-fsi","title":"QHYCCD QHY4040 Pro Series Scientific Camera (FSI)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e16.8 Megapixel Gpixel GSENSE4040 FSI Sensor\u003c\/li\u003e\n\u003cli\u003eLarge 36.9mm x 36.9mm Imaging Area\u003c\/li\u003e\n\u003cli\u003e9.0μm Pixel Size\u003c\/li\u003e\n\u003cli\u003eDual 12-bit ADC with High\/Low Gain Channels\u003c\/li\u003e\n\u003cli\u003e2x 10Gigabit Fiber Interfaces for High-Speed Transfer\u003c\/li\u003e\n\u003cli\u003eDual-Stage TEC Cooling to -35°C Below Ambient\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eQHY4040 Pro Series Scientific Camera (FSI)\u003c\/h2\u003e\n\u003cp\u003eThe QHY4040 Pro scientific camera integrates a 16.8 Megapixel Gpixel GSENSE4040 monochrome sensor with a large 36.9mm x 36.9mm imaging area for demanding research applications. Its 9.0µm pixels provide excellent sensitivity, while the dual 10Gigabit Fiber interfaces sustain a full-resolution frame rate of 12.0 FPS at 16-bit depth. A dual-stage TEC cools the sensor to -35°C below ambient, keeping thermal noise exceptionally low with a dark current of just 0.16e-\/pixel\/sec at -20°C.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe GSENSE4040 Sensor: 16.8 MP Across a 36.9mm Square Array\u003c\/h3\u003e\n\u003cp\u003eAt the core of the QHY4040 Pro is the Gpixel GSENSE4040, a large-format scientific CMOS sensor. The 4096 x 4096 pixel array, combined with a 36.9mm x 36.9mm physical size, is ideal for wide-field surveys, spectroscopy, and applications requiring maximum light collection on large-format optical systems. The large 9.0µm pixels are well-suited for sampling the sky on long focal length instruments without requiring aggressive binning.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDual 12-bit ADC: \u0026gt;70ke Full Well and 4e- Read Noise\u003c\/h3\u003e\n\u003cp\u003eThis Front-Side Illuminated (FSI) version of the QHY4040 Pro is engineered for maximum dynamic range. The sensor's dual 12-bit ADC architecture features two distinct channels: a high-gain channel with a low 4e- read noise for detecting faint signals, and a low-gain channel with a massive full well capacity of over 70,000 electrons to capture bright targets without saturation. The camera can combine data from both channels in-FPGA to produce a single 16-bit image with an exceptionally wide dynamic range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e10Gigabit Fiber Interface: 12.0 FPS at Full 16-bit Resolution\u003c\/h3\u003e\n\u003cp\u003eTo handle the massive data volume from its 16.8 MP sensor, the QHY4040 Pro is equipped with two 10Gigabit Fiber interfaces alongside a standard USB 3.0 port. In PCIE mode over fiber, the camera can sustain a continuous 12.0 FPS at full 16-bit resolution, feeding directly into its 2GB DDR3 internal buffer to prevent frame drops. This high-speed output is critical for time-domain astronomy, lucky imaging, and other applications where capturing rapid sequences is essential.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e4-Channel GPIO: Precision Timing for Scientific Applications\u003c\/h3\u003e\n\u003cp\u003eThe QHY4040 Pro includes four high-speed, FPGA-controlled GPIO trigger ports for advanced synchronization and timing. These ports can be configured to output a hardware exposure-end signal, allowing for high-precision time-stamping of observations when paired with an external GPS timing base. This capability is vital for scientific work like photometry of transient events, satellite tracking, and multi-camera synchronized imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eQHY4040 Pro FSI vs. BSI: Full Well vs. Quantum Efficiency\u003c\/h3\u003e\n\u003cp\u003eThe QHY4040 Pro series is available in both Front-Side Illuminated (FSI) and Back-Side Illuminated (BSI) versions, each offering a distinct advantage.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBSI Advantage:\u003c\/strong\u003e The BSI version delivers lower read noise (2.3e-) and higher peak quantum efficiency, making it the superior choice for imaging extremely faint targets where every photon counts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFSI Advantage (This Model):\u003c\/strong\u003e The FSI version provides a significantly larger full well capacity (\u0026gt;70ke-) compared to the BSI model's 36ke-. This makes the FSI camera ideal for applications involving bright objects or requiring the widest possible dynamic range in a single exposure.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary application for the QHY4040 Pro's large 9.0µm pixels?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e9.0µm pixels\u003c\/strong\u003e are ideal for long focal length telescopes used in scientific surveys and research. They provide a good image scale without requiring excessive binning, which preserves the sensor's native resolution while maximizing light-gathering capacity per pixel. This makes the QHY4040 Pro well-suited for photometry and astrometry.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the QHY4040 Pro's dual-gain 12-bit ADC improve dynamic range?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe QHY4040 Pro uses a dual-channel readout. The \u003cstrong\u003ehigh-gain channel\u003c\/strong\u003e provides very low read noise (4e-) to capture faint details, while the \u003cstrong\u003elow-gain channel\u003c\/strong\u003e offers a massive full well capacity (\u0026gt;70ke-) to prevent bright stars from saturating. The camera's internal FPGA can combine these two 12-bit readouts into a single 16-bit image, effectively capturing extreme brightness differences in one frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of data transfer rates can I expect from the QHY4040 Pro's 10Gigabit Fiber interface?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUsing the dual \u003cstrong\u003e10Gigabit Fiber interfaces\u003c\/strong\u003e (in PCIE mode), the QHY4040 Pro can transfer full 16.8 MP frames at \u003cstrong\u003e12.0 FPS at 16-bit\u003c\/strong\u003e depth or \u003cstrong\u003e13.0 FPS at 8-bit\u003c\/strong\u003e. This high-speed connection is essential for video astronomy, lucky imaging, and ensuring no data is lost during rapid-sequence captures, supported by the camera's 2GB DDR3 buffer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhen would I choose this FSI version of the QHY4040 Pro over the BSI version?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou should choose this \u003cstrong\u003eFSI (Front-Side Illuminated) version\u003c\/strong\u003e when your primary need is maximum dynamic range. Its full well capacity of over \u003cstrong\u003e70,000 electrons\u003c\/strong\u003e is more than double that of the BSI version (36ke-). This makes it superior for imaging scenes with both very bright and very faint objects, such as star clusters or galactic cores.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the QHY4040 Pro perform for wide-field sky surveys on a large-format astrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe QHY4040 Pro is exceptionally well-suited for this task. Its large \u003cstrong\u003e36.9mm x 36.9mm sensor\u003c\/strong\u003e can capture a massive field of view on corrected instruments like large Richey-Chrétien or Rowe-Ackermann Schmidt Astrographs. The high frame rate and 2GB buffer allow for rapid acquisition of survey fields, making it efficient for mapping large areas of the sky.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow can the QHY4040 Pro's hardware exposure signal be used to study a transient event like a supernova?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor time-critical science like supernova light curves, precision is key. You can connect the camera's \u003cstrong\u003eGPIO trigger port\u003c\/strong\u003e to a GPS timing device. The QHY4040 Pro will output a precise hardware signal at the exact moment an exposure ends. By logging these signals, you can create a highly accurate photometric record of the supernova's brightness changes over time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor\u003c\/td\u003e\n\u003ctd\u003eGpixel GSENSE4040, Monochrome, FSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution\u003c\/td\u003e\n\u003ctd\u003e16.8 Megapixels (4096 x 4096)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePixel Size\u003c\/td\u003e\n\u003ctd\u003e9.0μm x 9.0μm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Area\u003c\/td\u003e\n\u003ctd\u003e36.9mm x 36.9mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eA\/D Conversion\u003c\/td\u003e\n\u003ctd\u003eDual 12-bit ADC (combinable to 16-bit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull Well Capacity (FSI)\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;70ke- (High Gain), 26ke- (Low Gain)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRead Noise (FSI)\u003c\/td\u003e\n\u003ctd\u003e4e- (Typical @Gain31)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDark Current\u003c\/td\u003e\n\u003ctd\u003e0.29e-\/pixel\/sec @ -15℃, 0.16e-\/pixel\/sec @ -20℃\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExposure Range\u003c\/td\u003e\n\u003ctd\u003e20μs – 600sec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShutter\u003c\/td\u003e\n\u003ctd\u003eElectronic Rolling Shutter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eData Interface\u003c\/td\u003e\n\u003ctd\u003e2x 10Gigabit Fiber, 1x USB 3.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImage Buffer\u003c\/td\u003e\n\u003ctd\u003e2GB DDR3 Memory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame Rate (PCIE Mode)\u003c\/td\u003e\n\u003ctd\u003e12.0 FPS @ 16-bit, 13.0 FPS @ 8-bit (Full Frame)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame Rate (USB 3.0)\u003c\/td\u003e\n\u003ctd\u003e10.0 FPS @ 16-bit, 13.0 FPS @ 8-bit (Full Frame)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling System\u003c\/td\u003e\n\u003ctd\u003eDual-Stage TEC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCooling Delta\u003c\/td\u003e\n\u003ctd\u003e-35°C below ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnti-Dew Heater\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHumidity Sensor\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrigger Port\u003c\/td\u003e\n\u003ctd\u003e4x High-Speed GPIO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Wheel Port\u003c\/td\u003e\n\u003ctd\u003e4-pin QHYCCD CFW Port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Window\u003c\/td\u003e\n\u003ctd\u003eAR+AR Multi-Coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Focus\u003c\/td\u003e\n\u003ctd\u003e18mm (±0.5mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApprox. 990g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e40W (100%), 21W (50%), 16.8W (0%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemote Upgrade\u003c\/td\u003e\n\u003ctd\u003eYes, via USB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.qhyccd.com\/download\/\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/qhyccd-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eQHYCCD Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"QHYCCD","offers":[{"title":"Default Title","offer_id":52942990442781,"sku":"QHY-110182","price":20733.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/QHYCCD-QHY4040-Pro-Series-1_16d18708-b589-47b7-afb4-04768f887bfd.jpg?v=1789615000","url":"https:\/\/davidastro.com\/fr\/products\/qhyccd-qhy4040-pro-i-fsi","provider":"David Astro","version":"1.0","type":"link"}