DESCRIPTION
Six Inches of Apochromatic Perfection. Without the Back-Breaking Weight
There's a reason serious astronomers dream about a 6-inch apochromatic refractor. At this aperture, the universe opens up in a way that simply cannot be described — it has to be experienced. The challenge has always been that large APO refractors tend to be brutally heavy, demanding equally large and expensive mounts to carry them. The Explore Scientific ED152 in carbon fiber quietly solves that problem, and the astronomy community has been quietly delighted about it ever since.
What will you actually see through it?
At 152mm aperture and 1216mm focal length, this is a telescope that reveals things you didn't know you were missing. Jupiter's cloud structure becomes genuinely complex — not just bands but intricate detail within them, colour variations in the wake of the Great Red Spot, the tiny shadows of moons transiting the disc. Saturn's Cassini Division is crisp and confident. Enke's Division — one of the more challenging ring features — becomes a realistic target on nights of good seeing.
Deep sky at this aperture takes on a different quality entirely. Nebulae appear with a depth and three-dimensionality that leaves you standing at the eyepiece longer than you planned. The Orion Nebula, the Crescent Nebula, the Veil — filamentary structures visible, tendrils of gas and dust rendered with a delicacy that feels almost intimate. Galaxies show structure. Double stars snap apart with authority. And the 1216mm focal length is a beautiful match for planetary nebulae, galaxies and medium deep-sky targets for imaging — detailed enough to be dramatic, wide enough to be immersive.
Why choose the ED152 Carbon Fiber?
1. The weight problem is solved
At just 20.5 lbs — remarkable for a 6-inch APO refractor — the ED152 CF pairs happily with mid-range equatorial mounts like the Losmandy G11 family. You don't need an observatory-class mount or a team of friends to set it up. This is genuinely the scope that made a 6-inch APO refractor accessible to dedicated amateurs rather than just institutions.
2. 44% more light than a 5-inch, 125% more than a 4-inch
Those aren't marginal numbers. The jump in light-gathering from 127mm to 152mm is one of the most meaningful aperture upgrades in refractor territory — brighter deep-sky objects, tighter resolution, more detail on extended targets. You feel it immediately at the eyepiece.
3. The carbon fiber tube is not just for looks
Carbon fiber has a thermal expansion coefficient close to zero — meaning as the temperature drops during your session, the tube barely changes length. That translates to rock-solid focus stability throughout the night. No constant refocusing as things cool down. Just clean, sharp views from dusk to dawn.
4. The 3" hexagonal focuser is exceptional
Dual-speed, with heavy-duty tension locks and a rotation collar, this focuser was designed to carry serious imaging loads without flexure or slip. Mount your camera, your filter wheel, your field flattener — it holds position confidently. This is the kind of focuser that makes demanding astrophotographers feel properly looked after.
5. Diffraction-limited optics, certified
Every Explore Scientific APO triplet is certified diffraction-limited at 0.25PV or better. Register within 60 days and you can request your personal interferometric test data — the actual proof that your specific scope meets that standard. Not a brand claim. Actual data, for your actual telescope.
6. Matte black knife-edge baffles throughout
Internal light scatter is the quiet enemy of contrast and detail. The ED152's knife-edge baffling eliminates stray light efficiently, giving your views and images that deep, inky background that makes everything pop.
7. Research-class credibility, personal-use price
This scope is genuinely used in school and university observatories. The fact that a dedicated amateur can own the same instrument — with the same optics, the same build quality, the same performance — at this price point is one of those things worth pausing to appreciate.
8. Lifetime warranty on registration. One year standard, converting to a transferable life-of-product warranty when registered within 60 days. This is a scope built to last decades — and Explore Scientific are willing to stand behind that in writing
One thing to know before you buy
The ED152 is an optical tube assembly — mount, tripod, eyepieces and finder scope are all sold separately. That said, this scope deserves a mount that can carry it properly for long-exposure imaging work — an EQ6-class mount or better is the right foundation here.
Not sure which mount, field flattener or camera pairing works best with this scope? At Astronomy Haven we love having this conversation — drop us a message before you order and we'll help you build the right system around it. A scope this special deserves a setup that does it justice. 🌙
What's in the box?
- Explore Scientific ED152 carbon fiber optical tube assembly x1
- Two-speed 3" hexagonal focuser with heavy-duty locks and rotation collar x1
- Focuser extension tubes x2
- 99% reflective 2" dielectric diagonal x1
- Cradle ring with carry handle and Losmandy-style dovetail plate x1
- Hybrid finder scope base pre-installed x1
- Retractable dew shield x1
⚠️ Mount, tripod, finder scope and eyepieces sold separately
Who is this perfect for?
- An advanced visual observer ready for the finest large-aperture refractor experience within a manageable weight class
- A serious astrophotographer who wants research-grade optics for planetary, deep-sky and narrowband imaging
- Someone building a permanent or semi-permanent observatory setup
- Anyone who has ever looked through a 6-inch refractor and known immediately they needed one
Recommended accessories:
- Explore Scientific Waterproof Eyepieces
- Explore Scientific .7X 3-inch Focal Reducer Field Flattener
- Explore Scientific Finderscope
- Explore Scientific/Losmandy G-11 with PMC-Eight
- Telescope Drive Master
- Astrozap 6” Dew Heater Strap
SPECS
Optical Parameters
- Optical Design: Air-spaced apochromatic triplet
- Glass: HOYA FCD1 extra-low dispersion (ED)
- Coating: Proprietary EMD enhanced multi-layer
- Aperture: 152mm (6")
- Focal Length: 1216mm
- Focal Ratio: f/8
- Limiting Magnitude: 13.0
- Resolution: 0.75 arcsec
- Max Useful Magnification: 299x
-
Limiting Magnitude: 13
-
Total image circle: 50.8mm
-
Total image circle with 3" adapter: 76mm
-
Full illumination image circle with flat field adapter: 36mm
-
Full illumination image circle with 0.7 focal reducer (2"): 20.9mm
-
Full illumination image circle with 0.7 focal reducer (3"): 30.3mm
-
Image circle without distortion with flat field adapter: 40.4mm
-
Image circle without distortion with 0.7 focal reducer (2"): 46.4mm
-
Image circle without distortion with 0.7 focal reducer (3"): 46.4mm
Hardware Parameters
-
Model: TED15208CF-HEX33
- Tube Material: Carbon fiber
- Focuser: Two-speed 3" hexagonal with heavy-duty locks and rotation
- Diagonal: 99% reflective 2" dielectric
- Finder: Hybrid base pre-installed (scope not included)
- Tube Length (with dew shield): 52" / 1320mm
- Tube Length (without dew shield): 41" / 1041mm
- Tube Diameter: 152mm
- Weight: 20.5 lbs / 9.3 kg
- Mount Compatibility: Losmandy-style dovetail
-
Warranty1 year → lifetime on registration within 60 days
Other Features
-
Accessories: Losmandy style Dovetail, Cradle Ring with Handle, Two-Speed 3" Hexagonal Focuser, Hybrid 2N1 finder base, 99% Reflective 2-inch Diagonal
CA Residents: Prop 65 WARNING(S)
