Why do I need the Baader 1.25" Extension Tube for my Maxbright binoviewer?
You need a pair of these tubes if you use long focal length eyepieces (typically 30mm to 42mm) that cannot achieve a merged image. Their physical design prevents them from seating deep enough in the binoviewer to align with the optical path. These extensions provide the necessary spacing to correct this and allow for a single, merged view.
Can I use just one Baader 1.25" Extension Tube?
No. For binoviewing, you must use two identical optical trains. You will need a matched pair of these extension tubes, one for each eyepiece, to ensure that both eyes are viewing through an identical setup, which is critical for image merging and avoiding eye strain.
Will this extension tube work with eyepieces shorter than 30mm?
These tubes are generally not necessary for eyepieces with focal lengths shorter than 30mm. Most shorter focal length eyepieces do not have the same deep-set focal plane and will reach focus in the Maxbright binoviewer without any adapters.
Does the Baader 1.25" Extension Tube add any optical elements or affect image quality?
No, this is a purely mechanical adapter. It is a hollow tube that contains no lenses or glass. It simply changes the physical position of your eyepiece and does not alter the optical properties or introduce any degradation to the image quality.
I have a pair of 32mm Plössls for my Maxbright II binoviewer; will these tubes help me merge the image in my 8" SCT?
Yes, this is the exact scenario these tubes are designed for. A pair of 32mm Plössls is a classic example of an eyepiece that struggles to merge in a binoviewer. Using a pair of these 1.25" extension tubes will provide the correct spacing to achieve a clean, merged image in your SCT setup.
Will the Baader 1.25" Extension Tube work with other binoviewers?
While designed specifically for the Baader Maxbright series, this 1.25" extension tube may work with other binoviewers that exhibit the same issue with long focal length eyepieces. However, compatibility is not guaranteed, as the required spacing can vary between different binoviewer models.
