Altair 130mm ED FX Quad F5.0 Flat Field Astrograph Refractor

• True flat-field astrograph: integrated 4-element, dual-ED optical train delivers pinpoint stars corner-to-corner with no separate flattener or reducer required

• Full-frame ready: engineered for 24×36 mm sensors (and slightly larger per spot diagram) — perfect for modern FX DSLRs, mirrorless bodies, and TEC-cooled CMOS cameras

• Fast F5.0 performance: 650 mm focal length gathers photons quickly, pairs beautifully with ultra-narrowband filters, and keeps on-band response even under heavy light pollution

• Apochromatic color control: two ED elements tame blue halos on hot, white stars and outresolve camera lenses several times the price

• Rock-solid focusing: improved dual-speed rack-and-pinion with new bearings minimizes flexure and plays nice with Altair AAF, Pegasus FocusCube, ZWO EAF, and similar motors

• Tilt on tap: rear collimation/tilt screws let you chase perfect corners in real time with your imaging software as you add wheels, OAGs, and spacers

• Frame it fast: 360° rotator makes composition easy without disturbing focus or backfocus spacing

• Built to travel: compact footprint, top carry handle, and included 3" Losmandy-format plate keep rigs portable and stable in the field

• Altair QC: each optical tube is individually spaced, collimated, and tested before shipping; backed by a 2-year return-to-base warranty

• Solar safety note: for any white-light or H-alpha solar use, an appropriate Altair ERF/solar filter is mandatory

Specifications

• Optics: Quadruplet APO, 4 internal lenses with 2× ED elements

• Aperture: 130 mm

• Focal Length / Ratio: 650 mm, f/5.0

• Image Circle: Full-frame 24×36 mm (check spot diagram for larger sensors)

• Backfocus: 55 mm from rear M48 thread (APS-C tolerance approx. 10–15 mm)

• Threaded Back Options (male): M48×0.75 (focus reached with ~11.7 mm drawtube extension), M54×0.75 (~18.7 mm), M68×1.0 (~25.7 mm)

• Focuser: Dual-speed rack-and-pinion with upgraded bearings; motor-focus compatible (AAF, FocusCube, EAF, etc.)

• Field Rotation: 360° rotator

• Tilt/Collimation: 4× rear adjustment screws for imaging train tilt control

• Mounting: Included 330 mm (13") 3" Losmandy plate; top carry handle with dual Vixen/Arca dovetail profiles (guidescope quick-mount ready)

• Length: 68 cm (dew shield & focuser retracted); 80 cm (dew shield extended); 85 cm (max extension)

• Weight: ~11 kg including rings, top handle, and dovetail

• Quality Control: Individually spaced, collimated, and tested prior to dispatch (allow 1–2 business days)

• Warranty: 2-year return-to-base (manufacturing defects; reasonable use)

• Solar Use: Requires Altair ERF/solar filter (contact for correct mounting cell)

• Identifiers: MPN AA130F5-DEDQ-FX | SKU AA130F5 | GTIN 0747742378713 | Brand Altair | Product Code AA130F5-DEDQ-FX

• Package Delivery Weight: ~5 kg

What’s in the Box?

• Altair 130 mm F5.0 ED Quad APO optical tube assembly

• CNC tube rings with top carry handle (dual Vixen/Arca profiles for accessories)

• 330 mm 3" Losmandy-format dovetail plate

• Clamshell/Vixen-style secondary dovetail (as fitted; total weight spec includes Vixen bar)

• 360° field rotator and dual-speed R&P focuser with multi-thread rear adapters (M48/M54/M68)

• Front dew shield (retractable) and dust caps

• Documentation & QC report