Nikon F Mount 2" UltraWide Prime Focus Adapter View larger

Nikon F Mount 2" UltraWide Prime Focus Adapter


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Fits all Nikon F Mount SLR/DSLR Cameras. Our True-2™ UltraWide Adapter is a true 2" Prime Focus adapter that takes you directly from the bayonet mount to a 2" barrel with as few wasted photons as possible, adding as much as 10mm additional clear aperture over legacy T-Ring adapters!

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2" UltraWide Prime Focus Adapter
for Nikon "F" Mount SLR/DSLR

As seen in Sky & Telescope Magazine.

As the Imagers in our cameras grow larger it is more important to have an unobstructed light path to prevent vignetting. Most quality telescopes now have 2" Eyepiece ports and Camera Mounts are getting wider and wider. Why are we still putting a 1.5" bottleneck between them?

Our True-2™ UltraWide Adapter is a true 2" prime focus adapter that takes you directly from the Camera Bayonet mount to a 2" Barrel with as few wasted photons as possible, adding as much as 10mm more clear aperture over legacy adapters! The largest clear aperture of any adapter on the market. Fully baffled to reduce reflections and threaded for 2" eyepiece filters. 

Nikon F Mount Adapter

The True-2™ adapter goes directly from Bayonet mount to 2" barrel.
Bypassing the restrictive threaded T-Ring connection.

This increases the clear aperture from 1.5" to 1.85"
There is zero shading of the Sensor.


View Enlarged Setup Diagram

Never let a good photon go to waste! 


We introduced the first 2" UltraWide adapters almost 20 years ago.
Since then they have become the industry standard in 2" Prime Focus Imaging.  

Worlds Largest Selection of 2" UltraWide Adapters
We manufacture the worlds largest
selection of 2" UltraWide Adapters!

What is Vignetting?

Vignetting is simply shading of the camera sensor. The shaded area is essentially "dead" as those pixels will be dark. The result in your images will vary depending on the degree of vignetting. Minor vignetting may clip the corners off the image, whereas more significant vignetting will give you a circular image in a dark field. Sure you could do extra work on every photo to enlarge and crop your image in a pc. But that can mean accepting a lot of loss in both image quality and overall value. Especially if you have an expensive camera. What did 15% or 20% of that sensor cost you? People often pay a lot more for a Full Frame Imager just to have it cropped to APS-C by a T-Ring. It's a common story here.. A $5000 Telescope, a $3000 Camera.. and a $25 T-Ring choking out some of the photons before they ever reach that big beautiful sensor. As a general rule the shorter the focal length of the system the worse any vignetting issue will be. But even longer Focal Length scopes can have vignetting with larger sensor cameras when using a T-Ring connection. 

How did we get here?

The "T2" T-Ring standard was designed decades ago to specify a common focus point when connecting 35mm Film Cameras to imported aftermarket telephoto lenses, with no thought to the clear aperture needs of telescopes let alone cameras of the future. Our True-2 2" UltraWide Adapters are designed specifically to connect todays 2" Port Equipped Telescopes to modern DSLR & Mirrorless Cameras. And do it securely, precisely and without photon loss. 

Q: I have a Meade (or Celestron) SCT telescope and would like to have the benefits of this adapter but my scope only accepts 1.25" eyepieces. Is there any way I can use this adapter?
A: If your SCT is not already setup to accept 2" eyepieces and accessories you will need a 2" Rear Port Adapter, this item threads onto the large "SCT" thread on the rear cell of your scope and converts it to a standard 2" eyepiece port. The True-2 will slide directly into this port. Please see the setup diagram for details.

Q: I have a Meade (or Celestron) SCT telescope. Will this adapter thread directly on to the rear cell of my scope?
A: The True-2 adapter will not thread directly onto the rear "SCT" thread. It has a 2" barrel just like a 2" eyepiece and inserts into a 2" eyepiece port. If your SCT is not setup to accept 2" eyepieces you will need a 2" Rear Port Adapter. This is actually better than if it threaded on to the scope directly as it allows you to very quickly and easily install and remove the camera during a session. It also gives you absolute freedom in positioning the camera radially for the best framing of your shot.

Q: Will this adapter fit my spotting scope (or microscope)?
A: The True-2 adapter is for astronomical type telescopes equipped with 2" eyepiece ports only. It will not fit spotting scopes or microscopes.


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