{"id":15292,"date":"2025-07-05T14:59:46","date_gmt":"2025-07-05T12:59:46","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=15292"},"modified":"2026-07-18T11:53:38","modified_gmt":"2026-07-18T09:53:38","slug":"zwo-ff65-apo-65-416-quintuplet-ota","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/zwo-ff65-apo-65-416-quintuplet-ota\/","title":{"rendered":"ZWO FF65 APO 65\/416 Quintuplet OTA"},"content":{"rendered":"

Flat field of view without a flattener: the compact travel astrograph<\/strong><\/h2>\n\n\n\n

The ZWO FF65 APO<\/strong> is a five-lens quintuplet astrograph with ED glass that provides a completely flat field of view for full-frame sensors and beyond, with no separate flattener and no back-focus calculations. With a 65mm aperture, 416mm focal length (f\/6.4), and a low weight, this is the entry point into serious deep-sky photography that works right out of the box.<\/p>\n\n\n\n

Why a flatfield design?<\/h4>\n\n\n\n

With classic refractors, the distance between the flattener and the sensor determines edge sharpness, and that's precise to a tenth of a millimeter. The FF65 has that correction built in: screw on the camera and start shooting, with pinpoint stars all the way to the corners. The ED glass keeps chromatic aberration tight, even around bright stars.<\/p>\n\n\n\n

For whom yes, for whom no<\/h4>\n\n\n\n

For the (aspiring) astrophotographer who wants sharp wide-field shots directly without optical calculations, even when traveling. Not for: visual observers; this is a photographic tube with no eyepiece included.<\/p>\n\n\n\n

What's in the box?<\/strong><\/h3>\n\n\n\n