Published: November 1, 2012 Last Revised: December 16, 2018
We have a once-in-a-while webinar on beginning Astrophotography. The purpose of the webinar is to get people acquainted with the tools and techniques required to delve into this interesting genre of night photography. As we teach in that webinar the single most important piece of equipment you can buy is an Equatorial Mount. An Equatorial mount is an apparatus that counteracts the rotation of the earth so that your camera can peer at the same place in the sky for long enough to capture an image without streaks. There are many equatorial mounts that range in price from almost nothing (and not even worth nothing) to more expensive than logic would dictate. For more background please see our survey of Astrophotography Gear.
One of the newer pieces of equipment in the arsenal is a less-than three pound piece of gear called a Polarie. Here is what it looks like with a ball head attached to its face.
What Polarie Can Do
As noted earlier, the primary purpose of Polarie is to counteract the effect of the earth’s rotation so that objects in the night sky can be exposed longer without getting streaking. Below are examples of 42 second exposures using an effective focal length of 215 mm. The image at the left is with the Polarie turned on in normal mode, the middle image is the same length exposure but in 1/2 speed mode, and the right is what you get if you use no tracking at all.
Tracking is less critical when shooting with wider angle lenses. I ran a test with a 200mm telephoto lens because it is a more difficult scenario. For example when shooting the Milky Way, an effective focal length of 10 to 50mm makes more sense.
A Critical Look At Polarie
I purchased only the Polarie unit (about $400 USD) not any of the accessories. The unit is deceptively heavy at almost 3 pounds but at that weight it is still – and by far – the lightest equatorial mount you can find. The only other device in its weight class at present is the Astrotrac with a starting price about twice as much. The Astrotrac does come with a better tripod mount, however at a total cost of around $1300 USD. I paired up the Polarie with my Canon 50D and the 70-200 f/4 lens. The addition of a Giottos ball head brings the total weight of the equipment attached to Polarie to about 6 pounds.
- Good instruction manual
- Mostly easy to set up and to use
- Suitable for a beginner
- Good power for the price.
- Can be powered with mini USB (or two AA batteries). Claimed life is 4 hours on AA batteries but mine lasted at least 6 hours using rechargeable batteries.
- Compact and MUCH lighter than almost everything else.
- Can be used in Northern or Southern latitudes.
- Tracks at star, solar or lunar rates (and yes, they are all different) as well as a 1/2 speed rate which should be good for Landscape Astrophotography.
- The back plate can be unscrewed to peer through the axis of the motor and also houses a built-in magnetic compass but the plate is almost flush to the Polarie body and it is quite hard to grip.
- The inclinometer (angle measurement device on the side) seems like a good idea except that the markings are so small and coarse that to my eyes it is illegible. The lighted inclinometer *might* help if the North Star is obscured by trees or such.
- The front plate has a 1/4″ retractable bolt and attaches awkwardly to the motor plate with two thumbscrews that are hard to reach once a head is on the motor plate. I would have preferred that Polarie supply a 1/4 to 3/8″ adapter since most good heads attach via 3/8″ bolts.
- The battery compartment door is a nail buster to open.
- Since Polarie will certainly be used with a DSLR camera, Vixen really missed an opportunity to add a remote release cord – I see no jack for one.
- Not sure what the point of the flash shoe is. I do see the Vixen has another (much larger) inclinometer that can be attached there, but you may be able to do better using an application on your smart phone.
- The optional polar alignment scope is expensive, and bulky. It’s also complicated to operate because you must remove the ball head and camera from the device. BUT the weight of the camera and ball head is likely to create enough “sag” that the careful measurements will be wasted. We like the SkyTracker much better in this regard.
There is a sight hole to line up Polaris – the North star. I used only that method to align Polarie and got fair results. To get really long exposures one of two methods will need to be undertaken to increase the alignment accuracy: either invest in a Polarie polar alignment scope at almost double the cost or do drift alignment. Drift alignment is not simple and probably would frustrate the aspiring astrophotographer. The Polarie can be purchased with an optional ratcheting tripod base which might be a good idea, however the stated load capacity of the bundled tripod seems too low to use with a heavy camera.
Remember that you will need at least two heads and you’ll want them both to be ball heads for optimum configurability. The head on the tripod should be sturdy – see below for why. Below I refer to tripod head – the apparatus that joins the tripod to the Polarie, and to the Polarie head – which is the hardware used to attach a camera to the Polarie.
In addition to the negatives listed above, there are several other sources of problems including every point where one element attaches to another. For example: the Polarie base if not attached securely to the tripod head can rotate. If using quick release plates the attachment point creates another source of rotation. If the camera is not securely attached to the Polarie head rotation can occur there, too. All the pieces together may severely tax a cheap tripod head making it difficult to hold up or adjust the load. In my configuration I found I had to allow some slouching – meaning I had to adjust the camera so it was pointing slightly above my target and then tighten the head so that it would settle to the right place.
What Can You Do With A Polarie?
Maybe we should have put this section first! Some of these things can only be done with a Polarie are highlighted in RED.
- Point the Polarie straight up and use it as an automatic panning motor for a time-lapse.
- Align Polarie and take a series of shots of the night sky – the sky will stay in the same place in every shot – and any minor movement can be compensated for using Astrophotography procedures.
- Outfit your lens with a solar filter and track the sun (e.g. for photographing eclipses or solar activity)
- Track the moon e.g. to catch the space station flying across its face, the slow creep of the terminator, or just to get a time-lapse as the moon sets or rises.
- Double your exposure on a landscape astrophotography shot by using 1/2 speed mode.
For more hints tips and examples on how to use Polarie, stay tuned to this channel!
My first test of the Polarie was to track the radiant point of the Orionid Meteor shower. My attempt was mostly a bust due to clouds, however note how stable the time-lapse is – and remember this spans almost 14 minutes of real-time.
Here are two more ways I’ve used the Polarie – as a horizontal panning device
When I can find my polar alignment scope that came with my Orion Astroview Equatorial mount, I’m going to try it in the Polarie. My guess is that it will work just fine at a savings of about $180.
Found my mount and polar scope. The polar scope barrel diameter is smaller than the opening in the Polarie. I found some schedule 40 3/4″ PVC had just the right inside diameter for the outer barrel of the polar scope. Some machining in a bench grinder (and hand sanding) has allowed me to make a few prototypes. We’ll see how well aligned they are!
I used my cheap polar scope with my Polarie. It didn’t seem to help terribly much – in part due to mechanical slop that was my fault.
Two other “lightweight” systems to consider besides Polarie are:
$580, 2.5 pound AstroTrac only,
$1300, 11 pounds, AstroTrac with tripod and polar scope
$700, 9 pounds Losmandy Starlapse (without a tripod).
The Losmandy is solidly built dumbed down version of an equatorial mount. Despite that, it’s remarkably heavy (but will carry more gear). Unfortunately the bewildering array of configurations and optional components is likely to confuse all but the most desperate/dedicated astrophotographers.
Any thoughts on the Polarie vs. the new iOptron Startrakker? They are both the same price, but the Startrakker comes with a polar scope.
Polar scope is a nice add. The tilting base might be a help, though it only goes to 70 degrees. The stated capacity is a bit lower than Polarie but the battery life is a bit longer. The Polarie can be driven with a USB power supply. The iOptron requires higher power. iOptron doesn’t have lunar or solar tracking rates.
Of course I don’t have one, so I can’t say more. Some reviews seem favorable.
what do you think for orion min-eq?
its even cheaper, total is 150$ include a motor eq-1m
It’s a waste of money. See this article. What you’re describing is a cheaped down version of the Orion Adventures in Astrophotography bundle which itself is junk.
I am looking at something like a Radian panning solution. And also an astro tracker. However, what you have shown here is that the polarie can be used as a horizontal panning device!!
This is amazing for time lapses.
I have a ball head tripod, I was wondering if any standard ball head will attach to the polarie so that I can attach camera to it?
I recently found out about the Radian Kickstarter project. I am a backer of “Astro” which is similar, but a year behind schedule.
If you look at the photo above, you’ll see I have attached a Giottos ballhead to the face of the Polarie, so yes, any standard head (e.g. a ballhead) can be attached. Do understand that while the Polarie can be used to pan (and it’s fun), you only have a few speeds to choose from and the fastest rate is Sidereal (the rate of the earth’s rotation). Astro and Radian should allow you to pan much faster if you wish. The Polarie is also strong enough to pan vertically, but it’s a little more difficult to use in that fashion due to balance issues.
Any counterweight you use will have to be home brew. Duct taping weights to your lens hood, for example. In my case I carefully rested my iPhone on the lens hood. Not the epitomy of stability, but at the low-ish angle I was shooting it worked pretty well.
Tracking the sky with the iOptron SkyTracker
Thanks for the thorough review. I just picked up my Polarie, aand am going to put it to the test with a Nikon 200-500mm f5.6. I have seen others get some decent m31 shots with 5.6 telephotos. I just hope the weight won’t be too much! The manual says 6 lbs, so it should be alright.
What did you end up finding? Did this combo work well? I have a D750 and the 200-500mm and was looking to do the same thing.