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QHY5-III 178 Colour CMOS USB3.0 Planetary and Guide Camera

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in In stock (2)
0.60 kg
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including VAT 20.00 % ( £58.67 )



The QHY5III178 C has the highest resolution in the new QHY5III series CMOS USB3.0 cameras. The sensor has 2.4um small pixel size and 1/1.8inch bigger sensor size which can be used to get high precison guiding data and keep a good FOV to get many guide stars. The camera is designed to be an wide FOV autoguider, high resolution planetary camera and entery level deep sky camera. It has both mono version and color version.

For deep sky imaging, QHY5III178 has the anti-amp glow control function and it can reduce the amplifer glow significantly.

QHY5III178 sensor is the sony’s StarVis BSI image sensor. STARVIS is a trademark of Sony Corporation. The STARVIS is back-illuminated pixel technology used in CMOS image sensors for high sensitivity applications. It features a sensitivity of 2000 mV or more per 1 µm^2 (color product, when imaging with a 706 cd/m2 light source, F5.6 in 1 s accumulation equivalent), and realizes high picture quality in the visible-light and near infrared light regions.

The unique QHYCCD design keeps the 1.25inch eyepiece design. The advantage of this design is a more efficient transfer of heat to the outer case enabling lower noise especially in high ambient temperatures. The 1.25 inch design also offers the shortest possible backfocus, making the camera ideal for Off Axis guiding. In addition, the QHY5III178 uses the LEMO style connector for the guide port. These connectors are known for being both rugged and reliable connectors.


QHY5-III 178 Speciafications
CMOS Sensor Sony IMX178 Exmor CMOS sensor (Mono / Color)
Sensor size Typical 1/1.8inch
Effective pixels 3072 x 2048 (6 Mega pixels)
Effective area 7.37mm x 4.91mm
Pixel size 2.4 x 2.4 micrometer
Readout type Progressive scan
Full Well capacity TBD
Anti-ampglow Control Yes (Reduces the ampglow significantly)
Shutter Rolling shutter
Max frame rate

50fps @ 3072*2048, 100fps @ 1528*1024,
190fps @ 764*512

ADC Sample depth 10/14bit, output 8bit/14bit
Exposure time 9 milliseconds - 1200 seconds
Pixel binning 1x1, 2x2
MicroLens Yes, onchip micro lens array
Guide Port Yes, 5 pin Lemo aviation socket
Back focal distance appr. 11mm
Camera size 1.25" eyepiece size (D=31.6mm)
Optical Window AR+AR (mono camera), AR+IR-cut 680nm (Colour camera)
Support software ASCOM, SharpCap

Items included in standard package

  • QHY5-III 178 camera
  • Confocal ring (parfocalising ring)
  • 1.5m USB3.0 cable
  • 1.5m 5 pin lemo to RJ11 guide cable
  • (may not include the 50mm/F1.4 lens)

Comparison of The QHY5-III Series

QHY5-III Series Family
CMOS sensor IMX174 IMX178 (BSI) IMX224 IMX290 (BSI)
Full resolution 1920*1200 3072*2048 1280*960 1920*1080
Sensor size 1/1.2inch 1/1.8inch 1/3inch 1/2.8inch
Max FPS at full resolution 138fps 50fps 150fps 120fps
Max FPS with ROI
(region of interest)
220fps@960*540, 660fps@480*270
Colour version QHY5III174C QHY5III178C QHY5III224C QHY5III290C
Mono version QHY5III174M QHY5III178M N/A N/A currently
Pixel Size (um) 5.86 2.40 3.75 2.90
Peak QE 78%@Mono TBD TBD TBD






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