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T-Minus™ adapters provide distinct advantages over a T-Ring solution..
T-Minus adapters are a part of our larger "True-2" UltraWide Adapter line, as such they offer a full 10mm more clear aperture than a T-Ring setup.
T-Minus takes it's name from that fact that it is shorter than the "T" standard. T-Minus adapters are over an inch shorter than T-Ring solutions, for reflector owners this means you can likely reach true prime focus for the first time (without any telescope modifications or telenegative lenses).
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 thread on the rear cell of your scope and converts it to a standard 2" eyepiece port. The T-Minus adapter will slide directly into this port.
Q: I have a Meade (or Celestron) SCT telescope. Will this adapter thread directly on to the rear cell of my scope?
A: T-Minus will not thread directly onto the rear of an SCT scope, 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 T-Minus adapter is for astronomical type telescopes equipped with 2" eyepiece ports ONLY. It will not fit spotting scopes or microscopes. If you need help selecting the proper adapter just send us an email. Please include camera and scope models.