Projection Adapters

Unfortunately we cannot answer your questions because we have none of the old OMNI XLT telescopes here to check. Please look if you find a thread on the rear end of the focuser. If there is one, please measure the diameter and compare with the available ClickLock clamp thread sizes
https://www.baader-planetarium.com/en/baader-2%22-clicklock-eyepiece-clamps.html

Depende de la distancia focal de su telescopio. Las Pléyades tienen una extensión de aproximadamente un grado en el cielo, lo que equivale aproximadamente al doble del tamaño de la Luna llena. El campo de visión del telescopio se puede calcular con la fórmula: Campo de visión ocular x distancia focal ocular / distancia focal telescopio. Con una distancia focal del telescopio de 1000 mm, el cálculo sería 72x36/1000 = 2,6 grados. Eso sería suficiente para obtener una vista completa de las Pléyades.

It depends on the focal length of your telescope. The Pleiades have an extent of about one degree in the sky, which is about twice the size of the full Moon. The field of view of the telescope can be calculated with the formula: Eyepiece field of view x eyepiece focal length / telescope focal length. With a telescope focal length of 1000 mm, the calculation would be 72x36/1000 = 2.6 degrees. That would be enough to get a complete view of the Pleiades.

It is the same like from the CPC series. Celestron.com did publish the info you´re searching for under this link:
https://celestron-site-support-files.s3.us-east-1.amazonaws.com/support_files/CPC%20Series%20additional%20specifications.pdf
Here the part of your interest:
The CPC base has a flat plate of 10.171” in diameter. At 120° from one another, there are three
sets of two holes in the base. The inner holes in each pair are (on a circle) 5.125” diameter. The
outer holes in each pair are (on a circle) 6.450” diameter.These 6 holes are 3/8 x 16 threaded.

We are sorry, the manufacturer does not provide a magnification value for the Solarscope

Normally, readjustment is not necessary. But if you want to do so: There are 6 adjustment screws under the rubber. However, these are secured. You must first carefully warm up the glue with a soldering iron and then operate the adjustment screws. If you do not do this, they tear out.