Astronomy Specialist



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The QHYCCD Mini Guide Scope & 5L-II-M mono is a perfect guiding combination for short focal length telescope setups.


The QHY Mini Guide Scope is one of the lightest and most compact guide scopes on the market. With a diameter of 30 mm, focal length of 130 mm and fast focal ratio of f/4.3 finding a suitable bright guide star is easy. Broadband anti-reflection coating on the achromatic lens assures sharp star images thus improving the tracking accuracy of the system.

The front threaded focusing design with locking screw greatly simplifies the focusing mechanism without compromising accuracy. A number is engraved on the front focus ring to make it easy to remember the focus position. It can even be replaced with a short screw to permanently lock it in place once good focus is achieved.

The QHY 5L-II-M is the ideal camera for autoguiding and planetary imaging. It is extremely compact as it measures 1.25" in diameter so it can fit in standard off axis guiders and guide scopes. The 1.2 Megapixel CMOS sensor has an exceptionally high quantum efficiency at 74% and medium sized 3.75 micron pixels for a high signal to noise ratio. It is equipped with a USB 2.0 port that allows a download speed of up to 30 fps at full resolution (1280x960).


QHY Mini Guide Scope


Focal length
130 mm
Focal ratio
30 mm
Camera interface
C/CS Mount
OTA diameter
31.6 mm
Front focuser with digit mark and lock
111 g
SKU QHY-miniGuiderscope-WM




Sensor CMOS Aptina MT9M034 - MONOCHROME
1.2 Megapixels 1280 x 960
Pixel size 3.75 µm
Sensor size 3.74 x 3.75 mm [diagonal 5.92 mm]
Quantum efficiency peak 74 %
Exposure range 20 µs - 600 s
Read noise 4 e-
Bit depth 12 bit
Speed 30 fps at full resolution / 106 fps at 640 x 480
Compatibility Windows, Mac, Linux
Optical window AR coated
Ports USB 2.0 (type B); ST4
Back focus 11.30 mm (17.30 mm with CS mount)
Connections 1.25" / M28.5 x 0.6
Dimensions Ø 31.6 mm ; ↨ 54 mm
Weight 51 g


QHY 5L-II-M technical specifications


  • QHY Mini Guide Scope
  • Mounting rings and finder base
  • QHY 5L-II-M
  • Metal box
  • 20mm extender with a 1.25" external diameter and female thread M28 x 0.6 for filters
  • USB 3.0 cable (1.8 meter)
  • ST4 cable (1.5 meter)
  • Focus locking ring
  • Plastic shims to adjust the CS lens distance (lens not included)
  • Camera dust cap


Guide to installing QHY and ASCOM drivers for QHYCCD cameras.


ZWO camera software QHY camera drivers

PDF Icon Small QHY 5L-II manual


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