Takahashi FC-76D FLATTENER F/7.8 594mm FL

Takahashi has designed a dedicated flattener that is compatible with the FC-76D and all FC-76`s and FS-78`s.

When the dedicated flattener is used it changes the focal ratio to f/7.8 at 594mm when used with the FC-76S or D models.

This produces a 40mm flat field image circle.

FC-76D + 76D Flattener:

Focal length 594mm

F/ratio f/7.8

Image circle 40mm

FC-76 + 76D Flattener:

Focal length 624mm

F/ratio f/8.2

Image circle 40mm

FS-78 + 76D Flattener:

Focal length 658mm

F/ratio f/8.4

Image circle 40mm