Lucam Recorder - The easy way of...
Astro-Physics 0.72x Quad Telecompressor Corrector for TEC140ED Apo refractor. It features a 18.3 mm backfocus spacer (part number A2680) to reduce backfocus distance down at 80.8mm with TEC140ED refractor.
Astro-Physics 0.72x Quad Telecompressor Corrector for 130 StarFire GTX. It features a 22.1mm backfocus spacer (part number A5020) to reduce backfocus distance down at 80.8mm with StarFire 130 refractor.
Astro-Physics 0.75X Photographic-Visual Telecompressor (focal reducer). It reduces the native focal length of the system on which it is used by 0.75 times. For instance , a F/6 refractor will be transformed in to a faster F/4.5 optical system.