William Optics Apochromatic refractor AP 156/1217 Fluorostar Blue OTA

Description:

The Fluorostar has a three-lens air-gap objective using the FPL-53 ED custom glass from Ohara, Japan, and glass made of lanthanum. This extremely high-quality triplet design provides color purity and sharpness that leaves nothing to be desired - a true high-end instrument!

Combine this apochromat with an appropriately high-quality zenith mirror from William Optics, and you can see stars with a pinpoint clarity that few other optics can provide. Double stars separate clearly and sharply, the bright bands and zones on Jupiter show startling detail, and Saturn's rings stand out as if you were flying past them in a spaceship.

With its large aperture without any obstruction from secondary mirrors, as is necessary with reflectors, the wide world of Messier objects and also much more challenging deep sky objects is open to you. Once you have looked through such a high-quality apochromat, you will be lost in the vastness of space forever!

For astrophotography, the large image circle provides illumination even for full-frame cameras. In combination with the Flat7A flattener from William Optics, the result is a fast focal ratio of f/5.6. You can screw the flattener firmly onto the focuser.

The focuser has a smooth, precise gear reduction, a temperature indicator, and a wide range of adjustment. It easily supports heavy astrophotographic equipment, which can also be rotated to set the best position on the sensor.

Another special feature of the new William Optics apochromats is the specially chiselled focus mask according to Bahtinov:

These new acrylic optical focus masks offer 92% light transmission.

The imprinted pattern provides a diffraction pattern about three times brighter than the classic masks made of metal. The acrylic mask thus shows a clearer diffraction pattern and allows focusing even with the help of fainter stars.

The Rotolock adapter clamps the accessory centrally via a helical thread. This provides a secure hold and prevents tilting during clamping. In addition, the Rotolock adapter with its large, ribbed ring can also be operated very well with gloves.

The telescope is equipped with the newly developed carrying handle with long viewfinder shoe. This shoe clamps William Optics finders and guidescopes, but also any other additional optics equipped with a rail matching the Vixen/Skywatcher finder base.