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Eyepieces, Barlows, Filters, Star Diagonals, Adapters, Collimators, OTAs, & accessories for the Observer.




Howie Glatter Laser Collimator--2" 635nm TELEVUE DELOS, 1.25", ?-ELEMENT, 4.5MM, 72 DEGREES
VIXEN SSW 5MM 7-ELEMENT 83° ULTRAWIDE EYEPIECE-1.25"
Usually Ships in 24 Hours
List Price: $490.00
Our Price: $349.99
$50 Instant Rebate 4/1-7/30 $299.99
Savings: $190.01
2 in stock!
Howie Glatter Laser Collimator--2" 635nm
Usually Ships in 24 Hours
List Price: $245.00
Our Price: $175.00
Savings: $70.00
1 in stock!
TELEVUE DELOS, 4.5MM, 72°, 1.25", LONG EYE RELIEF
Usually Ships in 24 Hours
List Price: $445.00
Our Price: $340.00
Spring Into Summer Sale $290.00
Savings: $155.00
1 in stock!
5mm Vixen SSW Ultra Wide 83° 7 element eyepiece, Lanthanum and tantalum glass, Japanese made, Full multi-coatings, even on cemented surfaces, work with fast f/4.0 optics. Howie Glatter Laser Collimator--2" 635nm
Best for daytime or twilight use--brighter, more orange beam is more visible in daytime.
Delos' 72° field produces incredible sharpness from edge to edge--Perfect for all objects.  perfect for glasses wearers and non-glasses wearers because of an innovative eyecup design.
TELEVUE NAGLER TYPE 5, 2", 6-ELEMENT, 26MM, 82 DEGREES BAADER HYPERION MKIII 8-24 CLICK-STOP ZOOM #2454824--2"/1.25"
NEXUS DSC ADVANCED DIGITAL SETTING CIRCLES--WIFI HEAD UNIT, MICRO SD CARD, CHARGER
Usually Ships in 24 Hours
List Price: $647.95
Our Price: $404.99
Savings: $242.96
3 in stock!
TELEVUE NAGLER TYPE 5, 2", 6-ELEMENT, 26MM, 82°
Usually Ships in 24 Hours
List Price: $785.00
Our Price: $615.00
Spring Into Summer Sale $525.00
Savings: $260.00
1 in stock!
BAADER HYPERION MKIII 8-24 CLICK-STOP ZOOM EYEPIECE #2454824--2" OR 1.25"
Usually Ships in 24 Hours
List Price: $432.00
Our Price: $289.99
Savings: $142.01
1 in stock!
NEXUS DSC ADVANCED DIGITAL SETTING CIRCLES--WIFI HEAD UNIT, MICRO SD CARD, charger. Advanced digital setting circles computer--packs all the latest technologies into a state-of-the-art device. Encoders, wiring, and attachment hardware not included. This is a somewhat smaller, lighter and more powerful version of the celebrated 31 Nagler Type 5. Why? Because customers such as Tom Dietz, from the Smithsonian, are pests! :-) It weighs about 1.6 lbs and has a field stop diameter of 35mm. It is parfocal with the 17mm Nagler Type 4, making it a nice match in size, weight and convenience. High performance zoom eyepiece w/variable focal length 8-24mm with click stops
Hyperion Phantom Group multi-coated 42 (24mm) to 70 degree (8mm) FOV
TELEVUE ETHOS, 2"/1.25", 9-ELEMENT, 13MM, 100 DEGREES SnapZoom Cell Phone Adapter
TELEVUE ETHOS, 2"/1.25", 13MM, 100°
Usually Ships in 24 Hours
List Price: $780.00
Our Price: $610.00
Spring Into Summer Sale $520.00
Savings: $260.00
1 in stock!
SnapZoom Cell Phone Adapter for Optical Instuments
Usually Ships in 24 Hours
List Price: $96.00
Our Price: $69.99
Savings: $26.01
3 in stock!
TELRAD REFLEX SIGHT W/MOUNTING BASE + BULLSEYE RETICLE
Usually Ships in 24 Hours
List Price: $56.00
Our Price: $40.00
Savings: $16.00
3 in stock!
The best 100-110° eyepieces made. Superb clarity, color-fidelity, edge-of-field sharpness, light transmission, ultra-low distortion & comfortable 15mm eye relief. Ethos eyepieces have an enormous field with superb contrast. 21 to 3.7mm focal lengths available. SnapZoom Camera Adapter secures a smartphone to the eyepiece of any optical device for sharp, clear, close-up photos and videos without spending tons of money on a telephoto lens. TELRAD REFLEX SIGHT W/MOUNTING BASE.  CALIBRATED BULLSEYE OF 4°/2°/0.5° CIRCLE SIZE.  LONG BATTERY LIFE (TWO AA). ADDITIONAL BASES AVAILABLE FOR OTHER SCOPES.
ASTROSYSTEMS LIGHT PIPE 1.25" EXPLORE SCIENTIFIC 68° SERIES 16MM WATERPROOF Ar EYEPIECE-1.25" EXPLORE SCIENTIFIC 82° SERIES 24MM WATERPROOF Ar EYEPIECE--2"
ASTROSYSTEMS LIGHT PIPE SIGHT TUBE/CHESHIRE COMBO COLLIMATION TOOL--1.25"
Usually Ships in 24 Hours
List Price: $79.99
Our Price: $49.99
Savings: $30.00
2 in stock!
EXPLORE SCIENTIFIC 6-ELEMENT 68° SERIES 16MM WATERPROOF AR EYEPIECE-1.25"
Usually Ships in 24 Hours
List Price: $333.99
Our Price: $149.99
Savings: $184.00
4 in stock!
EXPLORE SCIENTIFIC 6-ELEMENT 82° SERIES 24MM WATERPROOF Ar EYEPIECE--2"
Usually Ships in 24 Hours
List Price: $667.99
Our Price: $299.99
Savings: $368.00
2 in stock!
ASTROSYSTEMS LIGHT PIPE SIGHT TUBE/CHESHIRE COMBO COLLIMATION TOOL--1.25". A SINGLE AFFORDABLE TOOL TO COLLIMATE BOTH MIRRORS. A wide-angle 68° eyepiece with full multi-coatings, argon-purged and waterproof, ans unsurpassed sharpness. 16mm, 1.25" And did we mention affordable? An ultrawide 82° field and argon-purged waterproof construction w/superb coatings all combine to make these the "Everyman's Series", useful on every type of object. 24mm FL
BAADER CONTRAST BOOSTER FILTER-1.25" #2458360 Olivon 58° -- HD 4mm 1.25" eyepiece UNIHEDRON SQM--WIDE FIELD VERSION
BAADER CONTRAST BOOSTER FILTER-1.25" #2458360
Usually Ships in 24 Hours
List Price: $116.00
Our Price: $81.99
Savings: $34.01
2 in stock!
Olivon 58° -- HD 4mm 1.25" 5-element eyepiece
Usually Ships in 24 Hours
List Price: $98.00
Our Price: $63.00
Savings: $35.00
2 in stock!
UNIHEDRON SKY QUALITY METER (SQM)--WIDE FIELD VERSION
Usually Ships in 24 Hours
List Price: $149.99
Our Price: $119.99
Savings: $30.00
1 in stock!
Baader Contrast Booster Filter 1.25"
A unique filter for many different astronomical tasks – incomparable in acuity. A strong minus-violet filter for achromats, and an EXCELLENT PLANETARY FILTER.
Olivon 4mm HD 58 degree astronomical eyepiece for planetary and general observations An accurate meter for measuring sky brightness for astronomers in magnitude per square arc-second, the "Sky Quality Meter" has superb sensitivity in a handheld meter! Wide 80° field.



SUPER DEALS

Lumicon Deep Sky Broadband Filter 2"

List Price: $420.99
Our Price: $299.99
Close Out $219.00
Savings: $201.99
Lumicon Deep Sky Broadband Filter 2"
Lumicon Deep Sky Broadband Filter 2"
The benchmark for broadband light pollution reduction, contrast enhancing, nebula filters


MOST RECOMMENDED

BAADER MORPHEUS 4.5mm 76° Eyepiece
Our Price: $239.99
EXPLORE SCIENTIFIC 92° SERIES 17MM WP EYEPIECE-2"
Our Price: $499.99
Olivon 22mm 70° 2" 8-element FMC eyepiece
Our Price: $129.99
TELEVUE ZOOM, 1.25", 3-6MM, 50 DEGREES
Spring Into Summer Sale $340.00
TELEVUE DELITE 18.2MM,1.25",62°
Spring Into Summer Sale $215.00


RECENT ARRIVALS

BAADER CLICKLOCK CLAMP FOR SCT 2" THREAD #2956220
Our Price: $102.99
TELEVUE DELITE 9MM,1.25",62°
Spring Into Summer Sale $215.00
Olivon 2" BK7 Roof Prism Diagonal w/1.25" adapter
Our Price: $189.99
BAADER CLICKLOCK CLAMP FOR SCT 3.3" THREAD
Our Price: $127.99
TELEVUE DELITE 5MM,1.25",62°
Spring Into Summer Sale $215.00