Airy Disk 0.92x Reducer / Flattener 85mm – 140mm

0.92x Field Flattener / Reducer for all APOs 2 Glass Elements ED 55mm Back Focus, adjustable T2 AP85 to 469mm f/5.5 AP95 to 529mm f/5.5 AP106 to 644mm f/6 AP140 to 837mm f/6 AP152D to 690mm f/4.6 AP204 to 1314mm f/6.4

Recommended for APS and smaller sensors.