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T-Rings / T-Mounts for Telescopes




T-Rings for SLR/DSLR Cameras

A T-Ring couples your SLR or DSLR camera body to a T-Adapter or other camera mount. Each camera manufacturer has a different mount, which requires a specific T-Ring. The internal thread is known as "T" or "T2" and is 42mm (.75 pitch). These quality T-Rings are CNC machined of aluminum with a durable black anodized finish.

For the new "Mirrorless Interchangeable Lens" cameras please see the next item down this page.

Camera Body Mount

Item #

  Price

 Add to Cart

 T-Ring for Canon EOS

TEOS

$18.95
T-Ring for Canon FD (manual)
TCAN
$14.95
T-Ring for Nikon
TNIK
$18.95

T-Ring for Olympus 4/3
For Full Size 4/3 Mount. Micro 4/3 Available below.
(Fits Olympus "E" Series)

T43E
 $22.95
T-Ring for Olympus (OM Series)
For Film SLRs ONLY. For OM-Digital see Micro 4/3 Below.
TOLY
$18.95
T-Ring for Pentax (M42) Screw Mount
TPSM
$14.95
T-Ring for Pentax K
TPKM
$18.95
T-Ring for Sony Alpha / Minolta Maxxum
For Full Size Alpha Mount. Sony NEX Available below.
TMAX
$22.95


T-Rings for Mirrorless Interchangeable Lens (MIL) Cameras
Standard "T2" Length

A T-Ring couples your camera body to a T-Adapter or other camera mount. Each camera manufacturer has a different bayonet mount, which requires a specific T-Ring. The internal thread is known as "T" or "T2" and is 42mm (.75 pitch). Note that standard "T2" Rings for MIL cameras are actually deep tubes as pictured above. They are longer than a DSLR T-Ring to meet the T2 standard which specifies flange to sensor distances (the thinner camera body requires a deeper T-Ring to make up for the difference). These quality T-Rings are CNC machined of aluminum with a durable black anodized finish.

If you need a thinner ring (very useful for reflector type scopes which often need just a bit more in-focus room) please see our special made "T-Minus" rings further down this page.

Camera Body Mount

Item #

  Price

 Add to Cart

T-Ring for Canon EOS "M"
(Fits Canon EOS-M Mirrorless Cameras)
(Note: Standard "T2" Length ~37mm)
TEOSM
$39.95
T-Ring for Nikon 1
(Fits Nikon V1, J1 etc)
(Note: Standard "T2" Length ~38mm)
TN1
$38.95

T-Ring for Micro 4/3
(Fits Panasonic Lumix G1/G2/GH1, Olympus PEN, etc)
(Note: Standard "T2" Length ~37mm)

TM43
$24.95

T-Ring for Sony NEX
(Fits all "E" Mount Cameras - NEX3, NEX5, NEX7, etc)
(Note: Standard "T2" Length ~37mm)

TNEX
$25.95

T-Ring for Samsung NX
(Fits Samsung NX5, NX10, NX11, NX100, NX200, etc)
(Standard "T2" Length ~30mm)

TSNX

 $25.95

T-Ring for Fuji X Mount
(Fits Fuji X-PRO1, X-E1, etc)
(Standard "T2" Length ~30mm)

TFX

 $25.95




"T-Minus"
Rings for Mirrorless Interchangeable Lens (MIL) Cameras
Special Short Length

Our custom made "T-Minus" rings get their name from the fact that they are shorter than the "T2" standard but still have the same 42mm (.75 pitch) threads. Normal T-Rings for MIL type cameras are typically 30-38mm deep. Our "T-Minus" rings are only 10mm deep. This is very useful for reflector owners who often don't have quite enough focus range to reach focus with a camera. They are also useful anytime you can use some extra focus room, such as for using a flip mirror or other accessory on a refractor. A T-Minus ring couples your camera body to a T-Adapter or other camera mount. Each camera manufacturer has a different bayonet mount, which requires a specific T-Minus Ring. These quality rings are CNC machined of aluminum with a durable black anodized finish.

Camera Body Mount

Item #

  Price

 Add to Cart

T-Minus Ring for Micro 4/3
(Fits Panasonic Lumix G1/G2/GH1, Olympus PEN, etc)

TMM43
$29.95

T-Minus Ring for Sony NEX (E Mount)
Fits "E" Mount Cameras w/APS-C Sensor
(Will NOT fit full frame cameras such as the a7 models)

TMNEX
$29.95

T-Minus Ring for Nikon "1" (Rokinon Brand)
(Fits all "1" Mount Cameras - V1, J1, V2, J2, etc)

TMNIK
$27.95

"T" Extension Set - 4 pc

This handy extension set can be used to securely place your camera where you want it. Threaded Male on one end, Female on the other. Thread size is 42mm (.75 pitch) for use with any standard T-Ring or T Adapter. Includes 4 pieces (20mm, 15mm, 10mm and 5mm). CNC machined of aluminum, fully baffled and anodized black.

Description
Item #
Price
Add to Cart

"T" Extension Set (4 piece)

TEXT
$29.95




Digital T Ring Adapters


Easy as 1-2-3!


1. Select a
suitable eyepiece and slip off the rubber eyeguard.


2.
Place the Digital T Ring on top and secure it with the included wrench.


3. Thread your eyepiece into your cameras step ring.

Your eyepiece becomes an afocal T adapter!

These Digital T Rings fit a wide variety of eyepieces and offer many advantages. Primarily used for attaching point & shoot type digital cameras to telescope eyepieces. They offer easy installation, light weight, virtually automatic centering, and the ability to couple more closely than just about any other adapter design. We offer 2 different sizes. Size #1 is by far the most popular and fits Meade 4000 Series Plossls, most 1.25" Meade SWA's and UWA's, Meade ETX 60/70 eyepieces, Celestron NexStar Plossls (newer type with rubber eyeguards only), Orion Sirius Plossls, ScopeTronix Plossls, Generic Series 300/400 Plossls, and many more imported eyepieces with removable rubber eyeguards. If in doubt simply pull the rubber eyeguard off the eyepiece you intend to use and measure the diameter of the top of the eyepiece. Not for use with eyepieces without rubber eyeguards. Note: Once installed you will have an eyepiece with a male T thread on top. You will also need an "Attachment Kit" to attach the Digital T-Ring to your digital camera. Manufactured of aluminum with a black anodized finish. Set screws and allen wrench are included.

Description
Item #
Price
Add to Cart
Digital T Ring #1
(Fits Size Range: 1.22" - 1.26")
DTR1
$27.95
Digital T Ring #2
(Fits Size Range: 1.10" - 1.14")
DTR2
$27.95




Use your best eyepieces for photography!


Fits many Tele Vue eyepieces!
(41mm Panoptic shown)

AdaptaView
Premium Eyepiece Adapter

This versatile adapter will fit many premium eyepieces with a removable rubber eyeguard and a top diameter (with the eyeguard removed) between 1.25" and 1.75". It is known to fit the following eyepieces....Tele Vue 32mm Plössl, 40mm Plössl, 55mm Plossl, All Nagler Type 2's and Type 4's, All Panoptics, Radians and Ethos. It also fits Televue and Vixen Zoom eyepieces and the following Meade eyepieces: UWA-8.8mm and 14mm, SWA-24.5mm, 32mm, 40mm and 56 Super Plossl. Useful for both SLR/DSLR and Digital Cameras using the proper step rings or T Ring. To use this adapter you slip off the rubber eyeguard and secure the 3 thumbscrews into the groove that normally retains the eyeguard. Due to the weight of the camera nylon screws are not an option, any light marks that may be left after removal will be covered up by the eyeguard when it is replaced (the same screw system is used by TeleVue on their Radian adapter).

This unit is equipped with a standard male "T" thread on top (42mm .75). You will also need a T-Ring, Step Ring and/or "Attachment Kit" to mount to your camera.

Description
Item #
Price
Add to Cart

AdaptaView
Premium Eyepiece Adapter

AVIEWU
$39.95


Universal T Adapters

The Universal T Adapter fits a very wide variety of eyepieces found on telescopes, microscopes, spotting scopes, even many medical instruments such as slit lamps. Available in 2 different size ranges to cover most eyepieces. These adapters are manufactured of aluminum with a black anodized finish and have 6 nylon thumbscrews to center and secure it to the eyepiece. The thread is a standard male 42mm "T" Thread. You will also need a T-Ring, Step Ring and/or "Attachment Kit" to mount to your camera.

Tip: After centering and adjusting the adapter for your eyepiece put a mark on an adjacent upper and lower thumbscrew.
From now on only loosen these 2 screws for removal and it will be self centering the next time you use it.

Description
Item #
Price
Add to Cart

1.5" Universal T Adapter
(Fits Eyepiece w/Outside Diameter .75"-1.5")

UT1
$29.95

2" Universal T Adapter
(Fits Eyepiece w/Outside Diameter 1"-2")

UT2
$39.95




1.25" Prime Focus T Adapter

This basic "T" adapter fits into a standard 1.25" telescope eyepiece port and has a standard 42mm male "T" thread on top. For use with SLR & DSLR type cameras at prime focus (using no eyepiece or camera lens). You will also need a T-Ring to fit your brand of camera. Manufactured of aluminum with a black anodized finish. The 1.25" end is also threaded for standard 1.25" eyepiece filters.

Description
Item #
Price
Add to Cart
 1.25" Prime Focus T Adapter
T125
$29.95


1.25" Reverse T Adapter
Attach Male 1.25" Devices to a Male T Thread

This Reverse T adapter will allow you to attach male 1.25" devices to male T threads. Used for such things as attaching an 1.25" imager to a projection adapter, etc. Manufactured of aluminum with a black anodized finish.

Description
Item #
Price
Add to Cart
 Reverse "T" Adapter
RTA
$29.95


Eyepiece Projection Camera Adapter

This basic eyepiece projection camera adapter fits into any standard 1.25" telescope eyepiece port and can hold a moderately sized eyepiece within it for eyepiece projection photography. Unlike "Prime Focus" astrophotography where you are just using the telescope as a large camera lens "Eyepiece Projection" allows you to increase the power by inserting the appropriate eyepiece into the adapter "projecting" the eyepiece image into your SLR or DSLR camera. You can also unscrew the 1.25" nose and connect it directly to a T-Ring for prime focus shots. You will also need a T-Ring to fit your brand of camera. Manufactured of aluminum with a black anodized finish. The 1.25" end is also threaded for standard 1.25" eyepiece filters. The eyepiece upper barrel can be no larger than 1.45" in diameter and no longer than 1.3" in length.This adapter is recommended for SLR & DSLR type cameras only.

Description
Item #
Price
Add to Cart
 Basic Eyepiece Projection Adapter
BEPA
$37.95

Variable Eyepiece Projection Camera Adapter

This Variable Eyepiece Projection Adapter allows you to do both Prime Focus and Eyepiece Projection astrophotography. By varying the length of the adapter you vary the placement of the film plane (or CCD sensor) in the light cone. The further back the higher the magnification. This is extremely useful for framing a shot just the way you want it. By changing the focal length of the eyepiece you can make major changes in magnification, by varying the adapter length you make smaller changes, think of it as a Coarse and Fine magnification control. This adapter fits into any standard 1.25" telescope eyepiece port and can hold a moderately sized eyepiece within it for eyepiece projection photography. For prime focus shots just unscrew the 1.25" nose and connect it directly to a T-Ring. You will also need a T-Ring to fit your brand of camera. Manufactured of aluminum with a black anodized finish. The 1.25" end is also threaded for standard 1.25" eyepiece filters. This adapter is recommended for SLR & DSLR type cameras only.

(The eyepiece upper barrel can be no larger than 1.5" in diameter. For larger eyepieces Email us)

Description
Item #
Price
Add to Cart
 Variable Eyepiece Projection Adapter
VEPA
$58.95

VariMax Pro-Series
Variable Eyepiece Projection Adapter

Please Note:
We are currently experiencing very high demand for the Varimax adapter due to an article in Sky & Telescope magazine.
Our machine shop is working overtime, but we are currently running about 10 days lead time on this item.
We appreciate your business and apologize for this delay!

 


Fits any DSLR Camera (with appropriate T-Ring).

 


VariMax compared to a standard projection adapter.
VariMax is the largest projection adapter in production.. anywhere.

 


A 32mm Plossl eyepiece doesn't begin to fill the VariMax!


Fits directly to a "T" Mount or 1.25" Focuser. Fits 2" Focusers w/optional 2" Barrel.

If you have been looking for an Eyepiece Projection adapter you have probably noticed they all have a few things in common.. they only hold small eyepieces with an upper body diameter of 1.5" or less. This limits you to (at most) a 25 or 26mm plossl eyepiece. They also have no means of easily determining the projection length, this can be frustrating if you want repeatability or just like to record your equipment settings so you can refer back to them in the future. They also typically only fit 1.25" focusers. All of that is just fine for your average amateur astronomer taking a few pictures now and then.

PROjection astrophotography starts here..

But if you take your astrophotography seriously have a good look at our new VariMax projection adapter. VariMax is the largest variable eyepiece projection adapter in production.. anywhere. It's so large a standard eyepiece projection adapter easily fits inside it! You can now use your larger more expensive 1.25" fixed (or Zoom) eyepieces, all the way up to 2.5" in upper body Diameter and 3.5" in upper body Height! The laser engraved scale enables you to easily record the projection length for repeatability with confidence. In its standard configuration the VariMax will directly fit onto any male T-Mount or into a 1.25" eyepiece port. Add the optional 2" barrel for direct connection to 2" eyepiece ports without the need for reducing adapters. The upper body has an extra wide machine knurled grip ring for a sure grip even in the worst dew conditions. Both barrel sizes are also equipped with standard "undercuts" to protect your expensive equipment from a loose eyepiece port retention screw (as can sometimes happen from temperature changes). We kept the portion below the eyepiece low profile, so VariMax requires no more back focus than a standard projection adapter. VariMax is also versatile, in addition to eyepiece projection you can use this adapter in various other configurations. For example you can use it with no eyepiece installed for use as a Variable TeleExtender, or you can use it with a Barlow Lens installed for TeleNegative Projection, or simply connect your T-Ring directly to the nosepiece for prime focus use. Please click the link below to view the comprehensive "Setup Diagram" showing how VariMax connects to various scope types and ports.

Please Note: Varimax requires a T-Ring to fit your camera. Other items may be required
depending on the type of telescope used. Please see the 'Setup Diagram" for specifics.

Click to View

Setup Diagram


VariMax Specifications
Approx Weight : 14.4 oz (.4 kg)
Extension Range : 1.26" (32mm)
Eyepiece Port Size : 1.25" (31.7mm)
Barrel Size : 1.25" standard (2" optional)
Max EP Height (Upper Body) : 3.5" (90mm)
Max EP Diameter (Upper Body) : 2.5" (63mm)
Direct Mounting Thread : 42mm (.75) "T" Mount

Temporary Introductory Price Only $129!

Description
Item #
Price
Add to Cart

VariMax Variable Eyepiece Projection Adapter
(with 1.25" Barrel / T-Mount)

VMAX1
$129.00

2" Barrel for VariMax

VMX2B
$24.95




2" Prime Focus Variable Tele-Extender
The Variable length lets you change magnification for easy framing of your shots!

This sturdy 2" Prime Focus adapter easily changes length, that lets you position the image plane of your camera exactly where you want it in the "cone of light" exiting your scope. This varies the magnification by changing the size of the image striking your CCD chip. Having some control over magnification makes it much easier to frame your shots just the way you want them. This adapter is also very useful for Refractor type telescopes. Since many refractors have a very limited focus range it is usually necessary to remove the diagonal and use an appropriate length extension tube in its place. This places the camera at the proper distance to reach focus within the limits of your focusers travel. Rather the trying to find the exact length of extension needed you can simply adjust the length of this adapter. So in this case it can prevent you from having to buy 2 separate parts. CNC Machined of aluminum with a durable black anodized finish. For SLR/DSLR type cameras only.

Specifications:
Size: 2"
Type: Prime Focus
Filter Thread: 49mm (Please note, not 48mm)
Min Extension: 60mm (Measured Flange to Flange)
Max Extension: 95mm (Measured Flange to Flange)

To use this with your SLR/DSLR camera you will also need a T-Ring to fit your brand of camera.

Description
Item #
Price
Add to Cart
 2" Variable Tele-Extender / Extension
VTE2
$44.95

 



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