William Optics Full-Frame Flattener/Reducer 0.72x

Description:

High-performance flattener and reducer for the large William Apo refractors GranTurismo GT102 (only with 3 "focuser), FluoroStar FLT132 and GranTurismo GT153. The flattener has a triplet APO design and is equipped with glass surfaces from Ohara. It also levels the field of view for Full format sensors and at the same time acts as a reducer with a focal length shortening by a factor of 0.72x. This shortens exposure times and the image field can be illuminated up to full format. By rotating the flattener can even be adjusted to the respective focus position. It is therefore suitable for different cameras -Types suitable, from the (full-frame) DSLR, through CCD to CMOS.

Additional accessories such as filters, extension sleeves or filter wheels can easily be combined with the William Optics Flattener. It has an embedded M48 filter thread to accommodate 2 "filters.

The respective back focus is:

FLT132 = 63.4mm

FLT156 = 60.8mm

GT102 = 67.1mm

GT153 = 60.4mm

An image field of 44.4mm in diameter is corrected and illuminated.