The Dwarf 3 surveys the night sky. The Draco goes hunting. That’s the split shaping up this week around Draco, the smart telescope DWARFLAB is teasing alongside its DWARF 3.
For several years, DWARFLAB has been making small telescopes do things they probably shouldn’t be able to do.
The DWARF 3 may be the best example. Its 35 mm aperture and 150 mm focal length do not sound particularly imposing on paper. Yet put the little telescope into EQ mode, point it at the sky for several hours and stack hundreds of exposures, and it can produce remarkably serious astrophotography.
The Draco appears to take that idea somewhere very different.
DWARFLAB’s own teaser site confirms one hard number so far: a 90 mm aperture. The same page promises longer exposures and, in DWARFLAB’s own words, more freedom under the stars, without naming a duration or explaining what that freedom means yet. The fuller feature set, a thermally managed sensor, exposures as long as 300 seconds, dew control, guiding, and sensor rotation, is circulating from DWARFLAB’s own social channels this week. None of it has landed in a published spec sheet as of this writing.
And then there are the specifications DWARFLAB hasn’t addressed at all.
Evidence found earlier in the DWARFLAB Atlas app showed Draco with a 1.87° × 1.05° telephoto field of view. A Chinese optical patent connected to DWARFLAB’s development ecosystem describes a compact folded optical system, including one configuration at 339.92 mm and f/3.78. Pair approximately 340 mm with a Sony IMX585 class sensor and the calculated field of view lands almost exactly on what appeared in Atlas.
That does not make 340 mm or the IMX585 confirmed specifications. It does make the combination hard to dismiss as coincidence.
Put all of this together and Draco doesn’t look like a larger DWARF 3. It looks like a different kind of smart telescope.
The Dwarf Surveys the Kingdom
The DWARF 3 is fundamentally a “wide” field instrument. Its telephoto system combines a 35 mm aperture, 150 mm focal length, and Sony IMX678 sensor. That produces a field approximately 2.9° wide and an image scale of about 2.75 arcseconds per pixel. That is a very useful part of the sky.
Large nebulae fit. The Andromeda Galaxy fits. Large emission regions can be framed naturally, and DWARFLAB’s mosaic capability expands that canvas considerably further. And then there is the other great DWARF 3 advantage: portability.
It is a telescope that can be carried outside, put on a tripod, and imaging within minutes. It can travel easily. Its wide angle camera provides an entirely different perspective of the sky. Its compact dimensions encourage experimentation, since setting it up doesn’t feel like committing to an observing session.
The DWARF 3 surveys the kingdom.
Draco appears designed to hunt within it.
Enter the Dragon
Start with the one major optical specification DWARFLAB has confirmed: 90 mm aperture.
That is a substantial jump from 35 mm.
Simply comparing aperture areas gives a 90 mm circular aperture approximately 6.6 times the geometric area of a 35 mm aperture. Draco’s folded optical design appears to require a central obstruction, so its actual clear collecting area will be lower than that simple calculation suggests. Throughput, coatings, and obstruction will also matter.
Nevertheless, this is not an incremental aperture increase. It changes the class of instrument.
Now add the strongest current optical hypothesis: approximately 340 mm focal length at around f/3.8, feeding an IMX585 class sensor.
The resulting image scale would be approximately 1.76 arcseconds per pixel. DWARF 3 is approximately 2.75 arcseconds per pixel.
That means Draco would sample the sky roughly 1.56 times more finely in each linear dimension, if the hypothesis holds.
For large targets, that narrower view is a limitation. For small targets, it is exactly the point.
M51 Explains Draco
Consider the Whirlpool Galaxy, M51.
M51 and its companion NGC 5195 are among the most photographed galaxies in the northern sky, but they are relatively small targets for a 150 mm telescope. DWARF 3 can certainly capture them. The surrounding field can be beautiful, and enough integration can reveal considerable structure.
But M51 occupies only a relatively small portion of the DWARF 3 frame.
At approximately 340 mm, Draco changes the composition. The galaxy becomes substantially larger on the sensor. Spiral structure receives more pixels. The bridge toward NGC 5195 becomes a more realistic imaging objective. Faint outer structure becomes something worth spending an entire night collecting.
The DWARF 3 shows M51 in the sky. Draco should be much better equipped to show M51 itself.
M81 and M82, M101, M27, M57, the Crescent Nebula, the Bubble Nebula, smaller galaxies, planetary nebulae, and compact structures within much larger emission regions all become increasingly interesting as focal length and sampling increase.
This is the Dragon’s hunting ground.
The 300 Second Question
Perhaps the most talked about Draco number this week isn’t the aperture.
It’s 300 seconds.
That figure hasn’t shown up on DWARFLAB’s own spec page yet. It’s circulating from the company’s social channels and has been reported independently by more than one community source, which is a different thing from a confirmed number on a data sheet. DWARF 3’s telephoto camera tops out at 60 second exposures in EQ mode, so if 300 seconds holds, that’s a fivefold increase in maximum sub length.
That doesn’t mean Draco owners should routinely select 300 seconds. Longer is not automatically better.
Sky brightness, filter bandwidth, sensor gain, tracking, wind, saturation, and target brightness all determine the useful sub exposure length. Once sky and target signal adequately dominate read noise, collecting more exposures can be preferable to simply making every individual exposure longer.
For broadband imaging, 30 to 90 seconds may often be entirely appropriate. For emission nebulae, 60 to 180 seconds could become particularly useful. With narrowband filtration and faint targets, the availability of 300 second exposures becomes much more interesting.
The important part isn’t that every Draco exposure needs to last five minutes. It’s that DWARFLAB appears to be building toward a system where it can, assuming the reported number survives contact with an actual spec sheet.
What Cooled Might Actually Mean
A five minute exposure would also make another emerging Draco feature more significant: sensor cooling. Here the exact language matters more than usual.
DWARFLAB’s own promotional copy for Draco describes one thermal loop keeping imaging clear across a wide operating range, roughly negative 20 to 45 degrees Celsius, rather than stating outright that the sensor runs cooled below ambient the way a dedicated astrophotography camera does. Community reports describe an actively cooled sensor, but that specific claim currently traces back to social posts and firmware hints, not a published spec sheet.
The distinction changes what the feature actually buys you. Managing a wide operating range mostly protects against dew and cold weather shutdowns. Sub ambient cooling attacks thermal noise directly, before the image is ever stacked, and that is the version that would represent the bigger step up from the DWARF 3’s uncooled sensor.
The DWARF 3 has already shown how much processing and stacking can extract from an uncooled camera. If Draco ships with genuine sub ambient cooling, that’s a real jump past that baseline rather than a repeat of it. Either way, thermal management of any kind adds power draw, engineering, and cost. DWARFLAB doesn’t appear to be adding this to pad a spec list.
Guiding Would Be the Piece That Makes 300 Seconds Work
Allowing a camera to expose for 300 seconds is easy. Keeping stars round for 300 seconds is not.
At a hypothetical 340 mm focal length and 1.76 arcseconds per pixel, tracking errors that the DWARF 3 might hide would become considerably more visible.
This is where Draco’s reported guiding capability would matter, if it holds up. Guiding would let the system measure tracking error and correct the mount mid exposure rather than trusting the mechanical drive to hold the sidereal rate for five minutes unassisted. Right now that’s a feature described in community reports of DWARFLAB’s own social posts, not yet something confirmed on a spec sheet.
Here is where things stand this week, sorted by how solid the ground is:
- 90 mm aperture: confirmed by DWARFLAB directly.
- Longer focal length: inferred from the patent filing and the app’s field of view data, not published.
- Finer image scale: a computed consequence of the two items above, contingent on both holding.
- Thermal management: confirmed in general terms; sub ambient cooling specifically is reported, not confirmed.
- Guiding: reported via social channels.
- Exposures up to 300 seconds: reported via social channels.
- Dew control: reported.
- Sensor rotation: reported.
None of these features is particularly novel on its own. Amateur astrophotographers have used cooled cameras, equatorial mounts, guiders, and rotators for years.
What would be significant is DWARFLAB putting them together into one integrated smart telescope, assuming the reported list survives contact with an actual spec sheet, which I believe it will.
Rotation Is More Important Than It Sounds
A rotating sensor may initially seem like a convenience feature. At 340 mm it becomes considerably more valuable.
The narrower the field, the more composition matters. Some galaxies and nebulae simply fit a rectangular sensor better at one orientation than another. Traditional astrophotographers solve this by rotating the camera or adding a motorized rotator.
Sensor rotation is one of the features reported through DWARFLAB’s own social channels rather than confirmed on a spec sheet. If it ships, a user could frame a target in the app, rotate the imaging field to the desired position angle, and start collecting data without touching the telescope. That would also make mosaics considerably more flexible.
And Then There Is Dew
Anyone who images through humid nights knows how quickly a successful session can end when an optical surface reaches the dew point.
Firmware analysis had already indicated a Draco lens defog and heating function, and DWARFLAB’s own Draco marketing copy reinforces the picture of a telescope built to stay outside for longer sessions, even if it doesn’t spell out the dew control feature by name yet.
That sounds mundane beside a 90 mm aperture. It isn’t. A telescope intended to collect data for four, six, or eight hours needs to manage the environment around it. Tracking, cooling, and optics are irrelevant if condensation ends the session at 1:30 in the morning.
Draco vs. DWARF 3
| DWARF 3 | Draco | |
|---|---|---|
| Aperture | 35 mm | 90 mm, confirmed |
| Focal length | 150 mm | ~340 mm, inferred |
| Focal ratio | f/4.3 | ~f/3.8, inferred |
| Tele sensor | Sony IMX678 | IMX585 class, inferred |
| Tele FOV | ~2.93° × 1.65° | 1.87° × 1.05° seen in app, unofficial |
| Image scale | ~2.75″/pixel | ~1.76″/pixel if IMX585/340 mm holds |
| Max tele sub | 60 s | Up to 300 s reported, not yet on spec sheet |
| Sensor cooling | No active TEC | Thermal management confirmed; sub ambient cooling reported |
| Guiding | No dedicated guider | Reported via social channels |
| Dew management | Passive thermal management | Reported |
| Sensor rotation | No | Reported |
| EQ imaging | Yes | Yes, dedicated implementation reported |
| Best character | Wide field, portability | Smaller and fainter targets, deep integration, if the reported feature set holds |
These telescopes overlap, but they aren’t really trying to do the same job.
Where DWARF 3 Still Wins
More aperture and focal length do not make every image better. Try putting a very large nebula into a 1.87° field. Suddenly 150 mm looks rather attractive.
The North America Nebula, Rosette, large sections of the Veil, expansive molecular cloud regions, and wide compositions around objects such as Antares naturally favor the broader instrument.
DWARF 3 also retains the enormous practical advantage of being small. A telescope that is with you captures more photons than a better telescope sitting at home.
There is also its wide angle camera and its suitability for landscape astronomy, Milky Way work, and very large compositions. Draco may have its own wide camera, but its principal astronomical purpose appears to be different.
This is why describing Draco simply as a DWARF 3 replacement misses the more interesting possibility.
Two Telescopes, Two Scales of the Sky
Imagine a clear summer night. The DWARF 3 is collecting a broad field around the Veil Nebula or building a mosaic across a large emission complex. Beside it, Draco is spending four hours on M51.
One instrument is collecting the architecture of the sky. The other is digging into one small piece of it. For an astrophotographer, those aren’t competing capabilities. They are complementary ones.
DWARFLAB may not be moving away from the philosophy behind the DWARF 3 at all. It may be extending that philosophy into a second class of astrophotography.
The DWARF 3 demonstrated how much sky a remarkably small automated telescope could capture. Draco appears intended to answer the next question: what happens when a smart telescope stops looking wide and starts looking deep?
We still need DWARFLAB’s full specification sheet. The 90 mm aperture is confirmed. The approximately 340 mm focal length and IMX585 sensor remain evidence backed deductions rather than published specifications, and the reported cooling, guiding, tracking, and 300 second exposure mode all still need a spec sheet behind them, let alone a night under real sky.
But the direction is becoming clear.
The Dwarf still surveys the kingdom. The Dragon just started hunting.
Clear skies!
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