QHY5III715 Colour Camera
QHY
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Overview
The QHY5III715C is an ultra-high resolution, back-illuminated color camera with extremely low read noise. The sensor has a 1/2.8-inch optical format, similar to the QHY5III462C. However, the QHY5III715C has four times as many pixels as the QHY5III462C, offering 4K resolution with 1.45μm pixels.
This makes the new QHY5III715C ideal for smaller, short focal length refractors. The exceptionally small pixels provide a field of view (FOV) of less than 1 arcsecond at focal lengths of 12 inches (300mm) or longer. The QHY5III715C inherits all of the updates and improvements of the QHY5III Series Ver. 2 line of cameras.
Extended Near-Infrared Sensitivity
The latest sensors feature deeper pixel wells, enhancing sensitivity to red and near-infrared (NIR) light. These sensors achieve peak NIR sensitivity nearly equal to visible light.
512MB DDR3 Buffer
The QHY5III (Ver. 2) cameras include a 512MB DDR3 buffer, doubling the memory of many deep-sky astrophotography cameras with 256MB. This reduces computer transmission load, ideal for high-speed planetary imaging.
New Front-End Design
The redesigned QHY5III (Ver. 2) cameras offer improved compatibility with a slim 8mm BFL, making them easy to integrate with off-axis guiders (OAGs). The 1.25-inch threaded adapter supports filters and interchangeable top glass allows seamless use of CS or C-mount lenses. A 1.25-inch filter wheel adapter connects monochrome cameras to QHYCFW3-S filter wheels.
USB 3.2 Gen 1 Type-C Interface
Upgraded to USB 3.2 Gen 1 Type-C, these cameras offer better durability and flexibility than the previous USB 3.0 Type-B. Use high-quality cables to avoid performance issues.
Universal Guiding Interface
The cameras now feature an ST-4 compatible guiding interface, replacing proprietary designs, allowing easy replacement of guiding cables at low cost.
Indicator LED
An indicator LED at the back signals camera status using different colors for diagnostics. It remains off during normal operation to prevent light contamination.

Specifications
Attribute | Details |
---|---|
Model | QHY5III715C |
Image Sensor | Sony IMX715 |
Mono/Color | Color Only |
FSI/BSI | BSI |
Sensor Size | 5.6mm x 3.2mm |
Pixel Size | 1.45μm x 1.45μm |
Effective Pixel Area | 3840 x 2192 |
Effective Pixels | 8.4 Megapixels |
Full Well Capacity | 5.7ke- |
Read Noise | 0.87e- to 2.17e- |
A/D | 12-bit (output as 16-bit and 8-bit) |
Built-in Image Buffer | 512MB DDR3 Memory |
Full Frame Rates | 42FPS@8bit, 23FPS@16bit |
ROI Frame Rates | 1920Lines, 83FPS@8bit, 47FPS@16bit 640Lines, 99FPS@8bit, 99FPS@16bit |
Exposure Time Range | 11μs - 900sec |
Shutter Type | Electronic Rolling Shutter |
Computer Interface | USB3.0 Type-C |
Guide Port | Standard ST-4 Style |
Telescope Interface | 1.25-inch, with CS and C-Mount |
Optical Window | AR Anti-reflection Glass |
Extra Filter | – |
Back Focal Length | 17mm (with adapter); 8mm (without adapter) |
Weight | 90g |
Let customers speak for us
from 153 reviewsBuilding my first astrophotography rig around a Williams Optics RedCat51 and the iOpteron Skyhunter with iPolar.
Great support from Astronz, answering my questions about assembly and set up. Some reviews of the Skyhunter point to problems with the RA clutch sticking, but I found the "use weight bar for leverage" solution worked fine.
Set up quick and easy; the instructions do assume a bit of technical knowledge but I'm finding CoPilot makes a great coach, even accepting screenshots if you are unclear.
iPolar took a little getting used to, but now down to a few minutes to get a very good alignment, after lining up on a compass baring. It does require a clear view of the Southern celestial pole, and I sometimes have to jockey the gain a bit if I'm setting up early evening and the light is changing.
Comparing to polar-alignment via platesolving in APT iPolar is faster, simpler, and easier, especially when setting the mount up in roughly the same place.
The mount plays very nicely with APT, so after using iPolar I'll platesolve, go to target, centre and sync. Very little drift even without a guide scope. (As an aside, CoPIlot makes a great coach, even able to interpret screen grabs and offer practical advice)
Not requiring power is another plus, keeping the cabling a bit easier. Powering/connecting the iOpteron, mount and a ZWO EAF all through a single USB-C hub from the laptop works fine.
Once I'd got past total newbie learning (with CoPilot) my first attempt landed my ~180 x 30 second exposures of Eta Carinae and exactly the kind of image I wanted to get.
Added an extra weight later on to balance the scope - CoPilot again very helpful on torque calculations and carrying capacity if you are a newbie like me.
Total rig weight is about 3.2KG excluding counterweights which works fine.
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