Mount Accessories

This diagonal is supplied with a 2 inch Click Lock on the eyepiece-side and a M68 male thread on the telescope-side. If you also want to use an m68 thread on the eyepiece-side, then you need the M68 female adapter with the part no. #2458234. We recommend the adjustable pin type face wrench ø 2mm part no. #2450062 for installation of this adapter.

It is worth trying, but because we developed the Alan Gee mainly for the Celestron C8 and the performance depends (among others) on the distance to the optics, we do not know how well it will actually perform with a Meade Schmidt Cassegrain - we never had a chance to test it.

The Herschel prism allows only 4.6% of the sunlight to pass through. This applies to all wavelengths, including UV and IR. Nevertheless, additional filters are of course necessary to make visual observation pleasant and, above all, safe. For visual use, you must always use an additional filter behind the Herschel wedge and the ND3 - this may be the Solar Continuum (which is included with the Herschel), another ND-filter or the single 2" polarizing filter #2408342. This filter can be mounted either inside of the 2" eyepiece or in the 2"/1,25"-reducer; if you rotate it, you can change the brightness according to your needs by rotating the eyepiece/adapter.

An additional IR-cut-filter is not necessary for visual use if you use the filters included with our Herschel wedge; it *may* be helpful to achieve sharper images with a CCD if the camera does not have an integrated IR-filter - but then you will usually need the filter for deep-sky-photography, too.

We are very sorry, we have no ClickLock clamp that fits to your refractor.

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