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Description
Sky-Watcher Quattro Overview
- 1Description
- 2Optical Performance
- 3Focuser
- 4Mounting
Sky-Watcher's 8" f/3.9 Quattro Imaging Newtonian Telescope has been specifically engineered for astrophotography and astro-imaging performance. Its 800mm focal length has been shortened to produce a fast f/3.9 focal ratio which helps to reduce the exposure times required for capturing detailed images of the Moon, planets, and deep-sky objects. To further help boost its performance are borosilicate mirrors which have a low coefficient of thermal expansion to reduce the effects of expansion/contraction due to temperature fluctuation. This helps limit distortion that can occur when moving the OTA from indoors to outdoors and limiting the scope's ability to resolve details. The entire optical system is fully multi-coated to increase the reflectivity of all surfaces to produce brighter and sharper images.
For imaging and visual use, the ability to achieve tack-sharp focus is critical, so Sky-Watcher outfitted the Quattro with a large 2" Crayford-style focuser. This design uses a steel rod held tightly against the focus tube under tension. Using this toothless friction system eliminates backlash and enables ultra-fine precision focusing. A large coarse-focus wheel quickly brings subjects into rough focus, and then the 10:1 fine-focus allows the user to precisely focus it without the risk of losing it as soon as the knob is released. Having the ability to use larger 2" accessories and eyepieces provides an immersive experience during observation sessions and the ability to use larger sensors for capturing images.
The Quattro is offered here without a mount or tripod for users that have a solid observation platform. Its cradle ring assembly clamps over the OTA and allows the OTA to be positioned for balancing when mounted, the eyepiece to be precisely placed for more comfortable observations, and the entire rig to be adjusted to avoid interference with other equipment and accessories. A Vixen-style dovetail plate on the bottom of the cradle ring assembly makes this OTA compatible with any Vixen-style saddle.
- 8" / 205mm aperture
- 800mm focal length
- f/3.9 focal ratio
- Optimized aperture-to-focal length (focal ratio) for enhanced astrophotography and imaging capabilities
- Highly reflective borosilicate mirrors
- Borosilicate mirrors have a low coefficients of thermal expansion to reduce the effects of expansion/contraction due to temperature fluctuations
- Highly reflective fully multi-coated optics
- 8x50 straight-view finderscope
- Crayford-style design
- Accepts 2" eyepieces and accessories
- Two coarse focus wheels, one on each side of eyepiece holder
- Fine smaller focus dial on right-side of eyepiece holder
- Crayford focusers use a toothless friction system that allows for super-fine precision focusing without backlash
- Cradle ring assembly enables the position and orientation of the scope to be adjusted for balance, ease of viewing, and to limit obstruction by other equipment
- Vixen-style dovetail plate
In the Box
- Sky-Watcher 8" f/3.9 Quattro Imaging Newtonian Telescope (OTA Only)
- 8x50 Finderscope
- Description
- Optical Performance
- Focuser
- Mounting
Sky-Watcher Quattro Specs
| Optical Design | Newtonian Reflector |
| Aperture | 203 mm / 8" |
| Focal Length | 800 mm |
| Focal Ratio | f/3.9 |
| Resolution | 0.57 Arcsec (Dawes) 0.69 Arcsec (Rayleigh) |
| Focuser | Dual-Speed Crayford |
| Eyepiece Barrel Diameter | 2" |
| Diagonal | None |
| Finderscope | Yes |
| Mounting | Vixen Style |
| Optical Tube Dimensions | 28 x 9.4" / 71.1 x 23.9 cm |
| Batteries | None |
| Adapter | None |
| GPS | None |
| Wi-Fi | None |
| Weight | 21 lb / 9.5 kg |
| Package Weight | 28 lb |
| Box Dimensions (LxWxH) | 31.5 x 17.5 x 15.5" |
Sky-Watcher Quattro Reviews
So far so good.
I only have this scope for a short time. I wan nervous about mounting it to an Sky-Watcher HEQ5 Pro mount because of its weight, but so far so good. I am a little disappointed on the amount of Coma that I get. Therefore, a Coma Corrector will be in my next purchase. The scope came in very badly collimated. The secondary mirror was way off, but with a help of a friend we corrected that. I strongly recommend a Bahtinov mask to properly focus the scope. I am including my first attempt at the Lagoon Nebula with this scope and a Nikon D3500 DSLR.
Excellent scope and great deal
Have had it out once since receiving, and, so far, am very happy with the scope. Photo was also great in communicating tracking and ETA information. Highly Recommended for your astrophotography and/or astronomy desires.
Excellent for imaging or visual use
Purchased primarily for astrophotography with my Nikon Z50 and Z6 mirrorless cameras. Combined with the SkyWatcher aplanatic coma corrector and AZ-EQ6 mount, I am so far getting good results from rural NJ skies. The scope is solid, hold focus for hours, and I have only had to collimate it once. The baffles due a great job of suppressing internal reflections, but I've had to watch out for light leakage from behind the primary due to the mirror cell design. Limited visual use but I did get very sharp images at 200x. With the Z50 stars are sharp except in the very corners, where a tiny bit of uncorrected coma still shows. With the full frame Z6, the edges and corners show too much residual coma for my taste, but that might be the result of the coma corrector requiring a spacing adjustment. Overall very satisfied.
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Bulk Discount
| Quantity | Price |
| 2 | ₹ 125317.5 |
| 3-5 | ₹ 124038.75 |
| 5-10 | ₹ 121481.25 |
| 10+ | ₹ 118923.75 |
Bulk discount will be automatically applied during checkout based on quantity.