Sky-Watcher Quattro-150P: the lightest f/4 astrograph
The Sky-Watcher Quattro-150P is an ultralight 150/600 mm Newtonian at f/4: maximum signal per minute in a tube weighing just 5.7 kg. This makes it the only serious f/4 astrograph that still belongs on an HEQ5-class mount, and the fastest route to deep-sky imaging without heavy equipment.
What can you photograph with it?
Everything where signal counts: faint nebulae, vast H-alpha regions, galaxies, and dust lanes. Where a slower system integrates for hours, an f/4 system captures the same on the sensor in half the time. Visually (with its own eyepieces), it is also a bright deep-sky telescope with a surprisingly sharp image in the center.
Why a Quattro?
The Quattro line is Sky-Watcher's fastest Newtonian series: f/4 means four times as much signal per minute as an f/8 system. The dual-speed Linear Power focuser (10:1) carries cameras without sagging and focuses at the pixel level. Note the fair caveat: no eyepiece is included. This is an astrograph; visual use is entirely possible, but with your own eyepieces.
This is how to get the most out of this telescope
- Collimation at f/4 is surgical work: check for every session with a good collimator. Our guide to collimation describes the routine.
- The aplanatic corrector belongs with it: Without a corrector, f/4 stars are comet-shaped at the edge. Factor this into the purchase, not afterwards.
- Mounting choice: An HEQ5-class mount comfortably carries this lightweight tube with camera and guiding.
- Guiding the moon At this brightness, every arcsecond of pointing accuracy counts in the star points.
- Give the mirror some cooling time and consider a light shroud against stray light and dew.
- Visual assistance a 6 mm eyepiece magnifies 100x; but bring your own eyepieces, there are none in the box.
For whom yes and for whom no
Hello the astrophotographer who combines speed and mobility, and the HEQ5 owner who wants to get the most out of their mount.
Not If you want photo results without mounting, guiding, and post-processing, then the smart telescopes the shorter route; ours Telescope Buying Guide for Beginners explain the trade-off.
Featured accessories
These accessories add the most after purchase:
- Aplanatic coma corrector f/4 at f/4, a corrector is not an option but a part of the optical system. The Sky-Watcher 2 inch Aplanatic Coma Corrector is specifically designed for the Quattro line and is a standard component.
- Cheshire eyepiece the Sky-Watcher Cheshire Eyepiece makes the critical f/4 collimation accurate and repeatable.
- Light Pollution Filter (2 inch) gets noticeably more contrast out of your shots under Dutch or Belgian skies.
- Moon Filter 25%: for visual moon phases dims the Omegon Moon Filter 25% (1.25 inches) the bright light. More explanation in our Moon filter guide.
- Carrier bag This short tube offers ample space for the 150/750 refractor. Check out the carrier bags.
Technical specifications
| Specification | Details |
|---|---|
| Optical design | Newtonian astrograph (parabolic) |
| Opening | 150 mm |
| Focal length | 600 mm (f/4) |
| Focuser | 2 inch dual-speed Linear Power (10:1) |
| Seeker | 6x30 optical with reticle |
| Ocular Adapters | 1.25 and 2 inch (eyepiece not included) |
| Tube weight | 5.7 kg |
| Mount | No (OTA) |
Included in the box
- Sky-Watcher Quattro-150P Optical Tube
- 2 inch dual-speed Linear Power-focuser with 1.25 and 2 inch adapters
- 6×30 optical viewfinder with wire cross
- Note: no eyepiece included (astrograph)
- Free: Stargazer's Handbook by Telescoop.nl (16 pages, Dutch language)
Free Stargazers' Handbook
Every Sky-Watcher telescope from Telescoop.nl comes with our own Stargazer’s Handbook in the box. It’s a 16-page booklet that helps you get started on your first few nights: how to align the finder scope, what magnification to start with, why the image sometimes wobbles, and when a telescope does or doesn’t need to be collimated. It’s not a thick book—just the essentials you really need when you’re starting out.
Honest advice from observers
We sell and use the Sky-Watcher line ourselves. In our Sky-Watcher brand guide We'll explain which series are strong and which you'd rather skip. View the full range on our Sky-Watcher brand page. Unsure about mounting or a corrector? Call or email us: we're happy to help with photo setups. Ordered before 11:59 PM is delivered quickly, in the Netherlands and Belgium.
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