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HomeOpticsTelescopesAstrophotographyAdapter Rings & Extension Tubes

Adapter Rings & Extension Tubes

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Alpine Astronomical M54 Fine-Adjustment Ring (1mm, Gold)

Alpine Astronomical M54 Fine-Adjustment Ring (1mm, Gold)

BH # ALM54RING10 MFR # M54RING-10
Key Features
  • Aluminum Spacer Ring
  • Prevents Binding Between M54 Threads
See All Details
Available in other Styles, Configurations & Kits
$1000
In Stock
No Store Display
Free Shipping for this Item
Alpine Astronomical Baader T-2 Aluminum Fine-Adjustment Ring (0.3mm)

Alpine Astronomical Baader T-2 Aluminum Fine-Adjustment Ring (0.3mm)

BH # ALT2FAR3 MFR # T2FAR-3
Key Features
  • Part of the Astro T-2 Modular System
  • For Fine-Tuning in Eyepiece Projection
  • Precise T-2 Diameter without Threads
  • Prevents Binding Between Threaded Parts
Available in other Styles, Configurations & Kits
$1150
Special Order
Expected availability: 2-4 Weeks
No Store Display
Shipping Charges Apply

Alpine Astronomical Baader M48 Aluminum Fine-Adjustment Ring (0.5mm)

BH # ALM48RING5 MFR # M48RING-5
Key Features
  • For Fine-Tuning in Eyepiece Projection
  • M48 Diameter without Threads
  • Compatible with 2" Eyepieces/Accessories
  • Use with Large-Format T-2 Gear
Available in other Styles, Configurations & Kits
$1150
In Stock
No Store Display

Alpine Astronomical M54 Fine-Adjustment Ring (0.5mm, Red)

BH # ALM54RING5 MFR # M54RING-5
Key Features
  • Aluminum Spacer Ring
  • Prevents Binding Between M54 Threads
See All Details
Available in other Styles, Configurations & Kits
$1150
Special Order
Expected availability: 3-5 Weeks
No Store Display
Free Shipping for this Item

Alpine Astronomical Baader Optical Spacer Ring 0.5mm for FCCT

BH # ALFCCTSPCR MFR # FCCT-SPCR
See All Details
$1300
Special Order
Expected availability: 2-4 Weeks
No Store Display
Shipping Charges Apply

Alpine Astronomical M54 Fine-Adjustment Ring (0.3mm, Black)

BH # ALM54RING3 MFR # M54RING-3
Key Features
  • Aluminum Spacer Ring
  • Prevents Binding Between M54 Threads
See All Details
Available in other Styles, Configurations & Kits
$1300
Special Order
Expected availability: 3-5 Weeks
No Store Display
Free Shipping for this Item

Alpine Astronomical Baader M68 Fine-Adjustment Spacer Ring (1mm, Gold)

BH # ALM68RING10 MFR # M68RING-10
Key Features
  • Fine-Tune Spacing of M68 Parts
  • Fits Between M68 Threaded Accessories
See All Details
Available in other Styles, Configurations & Kits
$1400
Special Order
Expected availability: 2-4 Weeks
No Store Display
Shipping Charges Apply

FotodioX Lens Adapter Astro Edition for T-Mount Wide Field Telescopes to Standard T/T2 Adapter

BH # FOT48T42 MFR # T48-T42
Key Features
  • Designed for Astro Photographers
  • Precise Fit and Solid Connection
  • Chrome Plated Brass Mounts
  • Precision All-Metal Construction
See All Details
Available in other Styles, Configurations & Kits
$1495
Special Order
Expected availability: 2-4 Weeks
No Store Display
Shipping Charges Apply

Starfield C-Mount to 1.25" Nose Piece Adapter

BH # STADCMNP1252 MFR # ADCMNP125-2
See All Details
$1500
Temporarily Out of Stock
Expected availability: 3-5 Weeks
No Store Display

Alpine Astronomical Baader M68 Fine-Adjustment Spacer Ring (0.3mm, Black)

BH # ALM68RING3 MFR # M68RING-3
Key Features
  • Fine-Tune Spacing of M68 Parts
  • Fits Between M68 Threaded Accessories
See All Details
Available in other Styles, Configurations & Kits
$1550
In Stock
No Store Display

Starfield M42 To M48 Adapter

BH # STM42M48 MFR # M42-M48
See All Details
$1599
Temporarily Out of Stock
Expected availability: 3-5 Weeks
No Store Display

ZWO 1.25" Filter Adapter to 2" Filter Holder

BH # ZWO2125FL MFR # ZWO-2-1.25FL
Key Features
  • Use 1.25" Filters in 2" Slot
  • Use with 5 x 2" and 7 x 2" Filter Wheels
  • Fits ZWO M42 and M54 Filter Drawers
See All Details
$1600
In Stock
No Store Display
Free Shipping for this Item

ZWO T2-T2 Extender (11mm)

BH # ZWOT2T211 MFR # ZWO-T2-T2-11
1 Review
Key Features
  • 11mm Extension of T2 Adapter
See All Details
$1800
In Stock
No Store Display

ZWO M54M-M54F-21 Adapter

BH # ZWOM5421 MFR # CP.05.0001.0116
See All Details
$1800
Special Order
Expected availability: 4-6 Weeks
No Store Display
Free Shipping for this Item

Starfield M42 x 0.75" to 1.25" Extension Adapter

BH # STM4275125 MFR # M42-75-125
Key Features
  • Add 1" to Focal Length
  • Male & Female M42 Threads
  • Thumbscrews to Hold 1.25" Eyepiece
See All Details
$2000
Special Order
Expected availability: 2-4 Weeks
No Store Display
Shipping Charges Apply

Starfield T/T2 Locking Ring

BH # STT2LOCK MFR # T2LOCK
See All Details
$2200
Special Order
Expected availability: 2-4 Weeks
No Store Display
Shipping Charges Apply

Starfield M48 Locking Ring

BH # STM48LOCK MFR # M48LOCK
See All Details
$2200
Special Order
Expected availability: 2-4 Weeks
No Store Display
Shipping Charges Apply

Starfield C/CS Locking Ring

BH # STCMLOCK MFR # CMLOCK
Key Features
  • 1"-32 Thread
  • 4mm Thickness
See All Details
$2200
Special Order
Expected availability: 2-4 Weeks
No Store Display
Shipping Charges Apply

Starfield T/T2 Male to T/T2 Male Adapter

BH # STADM42MM42M MFR # ADM42MM42M
Key Features
  • Internal Threads Reduce Reflections
  • M42 x 0.75 x 3.5mm Thread on One Side
  • M42 x 0.75 x 6mm Thread on One Side
  • Overall Height: 0.5" / 11.5mm
See All Details
$2200
Special Order
Expected availability: 2-4 Weeks
No Store Display
Shipping Charges Apply

Starfield T2 Male to 1.25" Nose Piece Barrel Adapter

BH # STAM42M125NP MFR # ADM42M125NP
Key Features
  • M42 x 0.75 Male Thread
  • Internal M28.5 x 0.6 Thread for Filters
  • Total Height: 27mm
See All Details
$2200
Special Order
Expected availability: 2-4 Weeks
No Store Display
Shipping Charges Apply

Sky-Watcher Rotator Adapter for EvoStar Refractor OTAs

BH # SKS20220 MFR # S20220
3 Reviews
Key Features
  • Use 0.85x Reducer/Flattener on EvoStars
  • Solid and Secure Threaded Connection
  • Rotate Imaging System with Unmounting
  • Integrated 2" Filter Threads
See All Details
$2250
In Stock
No Store Display

Pegasus Astro M54 Female Adapter for IndigoOAG Premium

BH # PEIOAGAM54F MFR # PEG-INDIGOAG-ADAPTER-M54F
See All Details
$2290
Special Order
Expected availability: 2-4 Weeks
No Store Display
Free Shipping for this Item

Pegasus Astro M48 Female Adapter for IndigoOAG Premium

BH # PEIOAGAM48F MFR # PEG-INDIGOAG-ADAPTER-M48F
See All Details
$2290
Special Order
Expected availability: 2-4 Weeks
No Store Display
Free Shipping for this Item

Pegasus Astro Indigo Filter Wheel Internal Adapter M54M

BH # PEIFWAM54M MFR # INDIGO-FW-ADAPTER-M54M
See All Details
$2290
Special Order
Expected availability: 2-4 Weeks
No Store Display
Free Shipping for this Item

Pegasus Astro Indigo Filter Wheel Internal Adapter M54F

BH # PEIFWAM54F MFR # INDIGO-FW-ADAPTER-M54F
See All Details
$2290
Special Order
Expected availability: 2-4 Weeks
No Store Display
Free Shipping for this Item

Tele Vue 2mm Spacer for 2.4" Imaging Accessories

BH # TELT2 MFR # TLG-0080
Key Features
  • Adds 2mm Space for Proper Placement
  • For 2.4" Imaging System Accessories
  • Black Anodized Aluminum
  • Un-Threaded
See All Details
Available in other Styles, Configurations & Kits
$2300
In Stock
No Store Display

Tele Vue 1mm Spacer for 2.4" Imaging Accessories

BH # TELT1 MFR # TLF-0040
Key Features
  • Adds 1mm Space for Proper Placement
  • For 2.4" Imaging System Accessories
  • Black Anodized Aluminum
  • Un-Threaded
See All Details
Available in other Styles, Configurations & Kits
$2300
Special Order
Expected availability: 2-4 Weeks
No Store Display
Free Shipping for this Item

Novagrade Standard Compression Ring Set

BH # NOACSD0000 MFR # AC-SD00-00
Key Features
  • Ideal for Spotting Scopes and Binoculars
  • Fits Eyepieces from 39-60.75mm Diameter
  • Includes Five Compression Rings
  • Non-Marking Injection-Molded Polymer
See All Details
$2300
In Stock
No Store Display
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