S50 Pro EQ mode with 60 second exposures

Getting started with your Seestar S50 Pro right out of the box is a lot of fun. And honestly, that’s one of the things Seestar does better than almost anyone else.

The S50 Pro comes with a good tripod, and the Seestar app is free to download. Charge it up, put it outside, connect your phone, and you can quite literally be observing and photographing the night sky within minutes. There’s no separate mount to configure, no camera to connect, no filter wheel to initialize, and no laptop sitting on a table beside you running half a dozen pieces of astronomy software.

For a lot of people, that simplicity is exactly the point.

But eventually you start digging a little deeper. You start looking at the images coming out of the S50 Pro and wondering, ‘How far can I actually push this thing?’

That’s where things get interesting.

Right out of the box, the Seestar operates as an Alt-Az telescope. In other words, the mount moves up and down in altitude and left and right in azimuth to follow an object across the sky. It’s an incredibly simple and effective way to track an object, but there’s a catch when you start talking about astrophotography.

Field rotation.

The telescope can keep your target centered, but because the Earth is rotating underneath the sky, the orientation of that target slowly changes during the night.

Think of it a little like walking up a circular staircase while staring at a picture hanging in the middle of the room. You can keep looking directly at the picture the entire time, but as you walk around the staircase your viewing angle slowly rotates around it. That’s essentially what happens with an Alt-Az telescope.

The object stays in the middle of the image, but the stars around it slowly rotate. The longer your individual exposure becomes, the more noticeable that rotation becomes. Eventually stars near the outside of the frame begin turning into little arcs instead of nice round points.

That’s one reason smart telescopes rely so heavily on short exposures, and short exposures aren’t necessarily a bad thing. Modern CMOS sensors are remarkably sensitive, and stacking hundreds or even thousands of short exposures can produce some surprisingly good results. In fact, one of the reasons telescopes like the Seestar work as well as they do is because modern software can align those individual frames, compensate for movement between them, reject bad frames, and combine everything into a much cleaner final image.

You can do a lot with 10, 20, or 30 second exposures, but there’s still a difference between what you can do and what you can do efficiently.

Once you begin chasing extremely faint nebulosity, subtle dust, dim galaxy structures, or narrowband signals, longer exposures start becoming much more valuable. Instead of reading the sensor over and over again for hundreds of tiny exposures, you’re allowing each frame more time to collect photons from the target. The signal has more opportunity to rise above the camera’s read noise and other electronic noise. That becomes especially important when you’re imaging really faint stuff.

So if you want to surf some bigger waves and really see what the S50 Pro is capable of, one of the most important things you can do is get it into equatorial mode.

That means mounting the Seestar at an angle so that its primary tracking axis is aligned with the Earth’s rotational axis. Once properly polar aligned, the telescope can track the sky by rotating around essentially one axis in the opposite direction of the Earth’s rotation.

The Earth turns one way; your telescope tracks the other.

And if everything is aligned correctly, your target not only stays centered, but its orientation stays essentially fixed relative to the camera as well. That gets rid of the field rotation problem that limits Alt-Az astrophotography and opens the door to longer individual exposures.

And this is where the S50 Pro starts becoming something a little different.

It’s still a smart telescope. It’s still incredibly easy to use. But now we’re beginning to borrow some of the same techniques used by much larger dedicated astrophotography rigs.

That’s when the little Seestar starts punching considerably above its weight.

Hardware Adjustments and Physical Setup

Transitioning the telescope into this advanced configuration requires some supplementary hardware and a bit of deliberate physical setup. You will need a sturdy, reliable photographic tripod and an equatorial wedge. The wedge is a mechanical base that sits securely between your tripod and the telescope, featuring fine adjustment knobs that allow you to tilt the entire unit to the correct angle.

Start by taking your tripod outside to your favorite observing spot. Point one of the tripod legs directly toward true north. It is absolutely critical that the top base of the tripod is perfectly level before you do anything else. Use a bubble level to ensure the platform is completely flat. Thankfully, the tripod included with the S50 Pro already has one. Any tilt in the base foundation will introduce frustrating tracking errors later in the night. Once the tripod is perfectly level, attach your equatorial wedge and secure it tightly. I happen to use the TH-10 tripod head that ZWO offers, but there are several good options out there.

Next, you have to set the elevation angle on the wedge. This is where the process gets slightly counterintuitive. Traditional heavy equatorial mounts require you to set the elevation angle to match your local geographic latitude perfectly. However, because of how the internal gravity sensors in the Seestar operate when the unit is tilted on its side, you must set the wedge to the complement of your latitude.

You calculate this simple math by subtracting your local latitude from ninety. For instance, living in the Missouri Ozarks, my latitude is roughly thirty seven degrees. Therefore, I had to adjust the mechanical wedge scale to exactly fifty three degrees.

Don't worry if your angle isn't perfectly precise, the Seestar app will help fine tune this angle when you enable EQ mode; we will cover that shortly.

With the angle properly set, carefully mount the telescope onto the wedge. Tilting the device drastically shifts its center of gravity. If you simply attach it directly to the wedge, the entire setup becomes extremely front heavy and runs the risk of tipping over with the shorter tripod supplied by ZWO with the S50 Pro. There are ways to counteract this, thankfully, and it can be as simple as extending the legs or using a balance adapter plate.

Take your time with this physical setup phase. A solid, balanced, and perfectly level foundation is essential to reliable and precise astronomical tracking.

Software Calibration and Polar Alignment

Once the physical hardware is securely locked in, the remaining work takes place entirely inside the mobile app. Power on the telescope and give it a moment to initialize its internal systems. Connect your smartphone or tablet to the device network and open the app. Instead of jumping straight into the sky atlas to begin observing, navigate to your profile, access the Advanced Features menu, and look for the Mount Mode settings. Tap the option to switch the device from Altitude Azimuth to EQ Mode.

The software will guide you through the initial orientation. First, it will ask you to adjust the physical tilt of the device until the on screen angle value matches your local latitude. With the power button facing upward and the unit roughly aligned with true north, lock that angle in place and tap the button to get your polar alignment deviation.  

This is where the Seestar process differs from standard dedicated astrophotography systems. Instead of demanding a direct view of the celestial pole and forcing you to chase crosshairs, the Seestar app automatically handles the next steps quite fluidly. The telescope will automatically capture brief images of the star field. By analyzing these images, the internal processor calculates your exact deviation from the true celestial pole.

After a moment of calculation, the screen will display your current vertical and horizontal alignment errors alongside straightforward directional arrow cues. Your goal is to use the mechanical fine adjustment knobs on your equatorial wedge to physically move the telescope in the exact directions the arrows indicate. If the application shows an arrow pointing right, you slowly pan the mount to the right; if an arrow points up, you adjust your elevation knob to tilt the setup upward.  

This process requires a gentle hand. After making a physical adjustment, you will prompt the application to take another image and recalculate your updated position. Continue refining your wedge adjustments by following the on screen arrows until both the horizontal and vertical deviations drop below one degree. When you cross that threshold, the app lets you know your polar alignment is officially successful. While chasing perfect zero error is a familiar habit from my heavy EQ6 setup, anything under one degree is mathematically more than sufficient for pristine sixty second exposures with the Seestar. Once you see that green confirmation, carefully lock down all the adjustment knobs on the wedge, tap finish, and prepare to image the deep sky.  

Experiencing the Night Sky Anew

With the polar alignment complete and the hardware locked down, you can start imaging right away. You can use the internal app catalogue to select your desired target, just as you normally would. The telescope will slew smoothly to the object, perform a plate solve routine to center it perfectly in the frame, and begin tracking the sky with precision. When you enter the main imaging screen, you will now see the option to select sixty second exposures. Watching that very first minute long sub exposure render on your phone or tablet screen is a quite a thrill, but the more time you give it, the better the result will be.

The glowing core of the Orion Nebula ceases to be a blown out white blob and suddenly reveals intricate, sweeping tendrils of dark dust. The faint, delicate spiral arms of the Pinwheel Galaxy, which are normally lost in the digital noise of a short exposure, become clearly defined against the inky grey-black background of deep space.

Operating the Seestar S50 Pro in Equatorial mode changes the fundamental nature of the device. It successfully transforms the unit from a casual backyard observation tool into a capable astrophotography instrument. It provides a level of depth, clarity, and detail that often can feel more rewarding than a traditional setup, considering how little time it takes to get up and running. While I still prefer the results I can get from my primary rig, the S50 Pro does a great job.

For someone balancing a busy family life with an enduring passion for the cosmos, this specific configuration is an absolute game changer. It offers a wonderful taste of the deep, rich data collection I enjoy with my heavy monochrome rig, but in a compact package that I can carry outside in one single hand and set up in less than ten minutes.

It allows me to spend less time fighting with heavy counterweights, tangled cables, and complex software, and more time sitting quietly on the back porch, perhaps with my wife or kids, sharing the incredible, quiet beauty of the universe that hangs faithfully over the Ozarks every single night.