Hosted by Chris Beckett & Shane
Ludtke, two amateur astronomers in Saskatchewan who
enjoy teaching astronomy classes and showing the public views
through their telescopes. actualastronomy@gmail.com
Top ten techniques for buying used telescope gear on Episode 552
of the Actual Astronomy podcast. I’m Chris and joining me is
Shane. We are amateur astronomers who love looking up at the
night sky and this podcast is for everyone who enjoys going out
under the stars.
New vs. used:
Baked in discount
Cheaper way to try different things
Less cost to buy try sell than new and get hit by
depreciation
Great out of production gear
Top 10 Ways to Choose Used Telescope Equipment:
Dedicated Astronomy Classifieds:
Buy through enthusiast platforms like Cloudy Nights or
AstroBuySell or online Japan Auction Sites rather than general
marketplaces although I’ve had good luck on eBay too. Astronomy
forums feature seller rating systems, community feedback, and
knowledgeable owners who generally take better care of their
optics.
Inspect Glass and Mirrors for Mold or Coating Loss:
A little dust on optics is normal, but avoid equipment with
scratches, flaking coatings, or fungus/mold. Mold grows in damp
storage conditions and permanently eats away at optical
coatings.
Test Mechanical Operations In Person:
Arrange local pickup whenever possible to test the gear. Rack
the focuser through its full range to ensure smooth motion,
verify that mount lock knobs tighten properly, and check for
wobbles or stripped threads.
Verify GoTo Electronics and Tracking Motors:
For computerized or tracking mounts, power on the unit to test
motor slewing, controller screens, and firmware updates. Check
battery compartments for acid corrosion, which frequently ruins
neglected electronics.
Compare Against Retail Pricing:
Cross-reference the original retail listing to check the standard
asking price (fair used prices generally hover around 60–75% of
current retail) and confirm that missing essentials like
counterweights, hand controllers, or finder scopes are accounted
for in the deal.
Ask for Close-Up Photos and "Pencil" Tests:
If buying remotely, request high-resolution, unedited
photographs of optics from multiple angles. Asking the seller
to place a specific object (like a handwritten note) next to
the gear helps verify that they actually possess the equipment.
Inquire About Storage and Service History:
Ask where the equipment was stored. Mounts kept in
unconditioned sheds or outdoor garages are prone to rusted
gears, degraded grease, and moisture damage. High-end mounts
may also have a documented service history.
Watch Out for DIY Modifications:
Amateur astronomers frequently alter equipment. Ensure any past
modifications—such as custom focuser upgrades, flocking, or
drilled mounting plates—were executed professionally and won't
hinder performance or future resale value.
Evaluate Mount Payload Capacity Realistically:
Don't evaluate a telescope tube in isolation; ensure the
bundled or intended mount can handle the weight. For
astrophotography, plan for a payload weight that is no more
than half of the mount's advertised maximum capacity.
Use Secure Payment Methods with Buyer Protection:
When paying online or via long-distance shipping, always use
payment channels that offer buyer protection (such as standard
PayPal Purchase options rather than "Friends & Family") to
safeguard against scams or damaged goods.
Ensure the item is well protected with proper packaging.
Purchase shipping insurance when acquiring expensive gear.
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