William Optic Flat61A leveller for ZenithStar 61

The Flattener lens flattens the field of view and counteracts the spherical aberration caused by the telescope's optical system, which makes stars near the edge of the telescope less sharp. Astrophotographers can finally rejoice, as this lens corrects this defect and allows photographs to be taken with stars that are completely sharp even at the edges. This type of lens must be placed between the telescope and the camera.

Mounting: the flattener is firmly attached to the thread of the focuser. To do this, simply unscrew the anodized, colored end piece as shown in the picture on the right. This part is used to hold a sleeve, but is no longer needed when using a flattener. Keep it in case you want to use the optics for a visual application with a zenithal mirror. The flattener can be connected directly to the thread of the focuser.

A T2 thread is available for mounting a camera. If you want to use a DSLR camera, use the corresponding T2/bayonet adapter for your camera manufacturer. At the end you will have a firmly screwed on system that is very stable and does not tilt!

The flattener is adjustable. You can set the correct distance and fix it with the knurled adjustment ring. This way you do not need additional extensions.

You can attach filters with M48 thread directly to the flattener. Simply unscrew the end piece on the side of the camera. You will then see an M48 thread to which you can attach the filter. Screw the flattener back on and you're done!