The ESATTO 3.5″ LP → PlaneWave DeltaRho 350 Adapter (PrimaLuceLab, SKU: PL3600386) allows you to mount the low-profile ESATTO 3.5″ LP focuser on the PlaneWave DeltaRho 350 f/3.8 astrograph. Precision milled from a single block of aluminum, the adapter guarantees perfect optical axiality, preserves the factory back-focus budget, and creates a rigid bridge between the OTA and the powered ESATTO controller, so that the rotation of the ARCO 3″ or a heavy full-frame camera does not introduce collimation deviations.

The most important features of the adapter

• dedicated to the PlaneWave DeltaRho 350 telescope – full mechanical compatibility
• maintains the back-focus of the instrument – optical length 23.36 mm
• made of 6061-T6 aluminum, hard anodized PL red
• milled centering surfaces - no play and guaranteed alignment
• PLUS-ready transition: M6 holes enable the installation of PLUS system rods, clamps or spacer rings
• Stainless steel mounting screws included

Set components

• ESATTO 3.5″ LP → DeltaRho 350 adapter
• set of M6 screws for mounting (6 pcs.)

Technical parameters

• Telescope side: PlaneWave DeltaRho 350 collar
• Extractor side: ESATTO 3.5″ LP collar
• optical length: 23.36 mm
• Outer diameter: 117 mm
• material: aluminum 6061-T6, anodized
• weight: 220 g
• color: red (PrimaLuceLab standard)
• accessory compatibility: PLUS system (M6 threads every 55 mm)

If you want to equip your DeltaRho 350 with a precise, motorized ESATTO 3.5″ LP focuser, this adapter is a must-have. It provides maximum rigidity, maintains perfect collimation, and allows you to fully utilize the astrograph's large corrector field – even with heavy full-frame cameras and the ARCO 3″ rotator.