QHY5III678 Colour Camera
QHY
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Overview
QHY5III678M/C, the upgraded version of QHY5III 178M/C, is a new planetary and guiding camera of QHY5III V2 series with excellent near-infrared high sensitivity.
Extended Near Infrared Sensitivity
In this latest generation of sensors, the photodiode portion of the pixel well is physically deeper than in previous sensors, allowing photons of longer wavelengths to penetrate further into the substrate. This dramatically increases the sensor's sensitivity to red and near-infrared (NIR) light. The sensor exhibits nearly equal peak sensitivity to NIR light as it does to visible light.
512MB DDR3
The QHY5III (Ver. 2) series planetary and guiding cameras are all equipped with a 512MB DDR3 image buffer which can effectively reduce the pressure on computer transmission, a great help for planetary photography which often requires writing a large amount of data in a short period of time. Some deep-sky astrophotography cameras on the market today only have 256MB, for example.
In comparison, the 512MB DDR3 memory of the new 5III (Ver. 2) series cameras represents a significant upgrade.
New Front-end Desn with Better Compatibility
QHY5III (Ver. 2) series cameras have adopted a new front-end design with improved compatibility.
The BFL (back focal length) of a V2 camera is only 8mm, which means you can easily integrate a V2 camera with your OAG (off-axis guider). The basic top adapter includes 1.25-inch threads, so you can still use your 1.25-inch filters.
The top adapter glass of the V2 can be easily swapped. One of the advantages of interchangeable top glasses is that you can use a filter even if you’re using a lens! You can add a 1.25-inch to CS adapter to connect a CS lens, or add a second CS-C adapter for a C-mount lens. Both adapters are standard accessories for V2 cameras.
Additionally, there’s a 1.25-inch filter wheel adapter available to connect your monochrome planetary camera to the QHYCFW3-S filter wheel.
USB 3.2 Gen1 Type C Interface
The new QHY5III (Ver. 2) series cameras all use the USB 3.2 Gen 1 Type-C interface. Compared to the USB 3.0 Type-B interface used in the previous generation, the Type-C interface offers a longer lifespan and greater flexibility.
Tip: It is recommended to use the official QHYCCD standard Type-C data cable. Since the market is flooded with a large number of poor-quality Type-C cables, using an inferior cable may cause the camera to malfunction. If you choose to use your own cable, please ensure it is of high quality.
Universal Guiding Interface
The custom interfaces used in the previous generation of planetary cameras and guiders have been replaced in the QHY5III (Ver. 2) cameras with a more universal ST-4 compatible guiding interface. Now, even if the guiding cable is lost or damaged, you can easily find a replacement on the market at a low cost.
Indicator LED
The new QHY5III (Ver. 2) series cameras are equipped with a status indicator at the back of the camera. If the camera experiences an abnormal condition, the coloured indicator light will help diagnose the issue, with different colours signifying different statuses. During normal operation, the indicator light is off, so there’s no need to worry about light contamination in the image.

Specifications
| Attribute | Details |
|---|---|
| Model | QHY5III678M/C |
| Image Sensor | Sony IMX678 |
| Mono/Color | Both Available |
| FSI/BSI | BSI |
| Sensor Size | 1/1.8 inch |
| Pixel Size | 2.0μm x 2.0μm |
| Effective Pixel Area | 3856 x 2180 |
| Effective Pixels | 8.4 Megapixels |
| Full Well Capacity | 9ke- |
| Read Noise | 0.57e- to 3.3e- |
| A/D | 12-bit (output as 16-bit and 8-bit) |
| Built-in Image Buffer | 512MB DDR3 Memory |
| Full Frame Rates | 43FPS@8bit, 22FPS@16bit |
| ROI Frame Rates | 1080Lines, 85FPS@8bit, 43.5FPS@16bit 640Lines, 140FPS@8bit, 71FPS@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 (5III678M) IR-Cut filter (5III678C) |
| Extra Filter | IR850nm Filter Included |
| Back Focal Length | 17mm (with adapter); 8mm (without adapter) |
| Weight | 90g |
Let customers speak for us
from 231 reviewsAs a complete novice this is easy setup and go I already have some amazing nebula images
Had a problem with a mount and the Astronz team couldn't have been more helpful in supplying a part (a replacement PCB from their demo model) that I could fit and test. Just outstanding and responsive customer service.
Great design, no more lost thumbs crews!
Exactly what I wanted. Super fast delivery to Christchurch.
An amazing device, incredible
Astronz 08" Premium Dobsonian Telescope
I was pleasantly surprised when Astronz came up with a new RA axis lock to replace my broken one. Astronz always go the extra mile!
Nice product. Astronz were a great help advising me what I should get. Great sellers
As a stargazing company, we get most of our gear through Astronz. Customer relations with the team at Astronz are always pleasant and we find their products including this base to be A+. We recommend Astronz to all our stargazers.
Bought 8" Dobsonian from AstroNZ. It came securely packed, delivered promptly. Took a bit to assemble but was totally worth it. Have been able to view moon only so far, still not mastered to look at farther objects. But easy to use and great product. Will recommend to beginners definitely.
Weight arrived promptly and as described. Happy with the purchase
Great performance for its price point in an 8" SCT. Sharp across most of the FOV, with only slight softening at the edge.
great gadget
The telescope is great. I've got a lot to learn though it seems.
I haven't had as much viewing opportunities as I would like but you can't do much when you have 2 weeks of constant overcast. I like the crayford focuser, and the finderscope is high quality with a good aperture, the views of Jupiter, the moon, Carina and Orion nebula and Omega centauri have been great with the 30mm super view and 9mm, thinking about getting a 6mm, Barlow lens and a neutral density filter to expand my arsenal, so far going from a 60mm refractor to a 8in Newtonian hasn't been too hard. Collimating for the first time was a challenge but i have it sorted out. Only few things to point out is I don't think I got a manual but the video was plenty helpful, perhaps you could sell dew shields for the finderscope and to protect the secondary mirror as well as telescope heaters for active protection, potentially some new videos starring Andrew about star hopping to find dim DSO's without a computerized mount. Overall very happy with my purchase, with the 8in dobsonian being known as a lifetime scope I know It will always have a place in my heart even if I do upgrade to bigger and better scopes. Thank you Andrew for your great customer support and service. I bid you clear skies from the deep south!