Askar FRA500 90mm f/5.6 Quintuplet Flat-Field APO Astrograph

Askar FRA500 90mm f/5.6 Quintuplet Flat-Field APO AstrographAskar FRA500 f 5. 6 Quintuplet Astrograph APO Refractor Telescope The Askar FRA500 belongs to the renowned FRA (Flat field Refractive Astrograph) series. With a quintuplet, Petzval like design including two ED elements, it delivers a naturally flat field and excellent chromatic correction for full frame astrophotography and refined visual observing. Highlights 5 element Petzval style optical system (3+2) with two ED lenses for tight, colour pure stars

Parfocal with the rest of the Astronomik filter range

5 focal ratio for full frame imaging

our 5A PSU AC Adapter is a must-have accessory

the clamp can also connect Losmandy dovetail systems to SkyWatcher HEQ5 and AZ-EQ5 mounts

red light is long on full charge

This is important because some older descriptions incorrectly refer to battery life

Pacman Nebula NGC 281 in the Hubble PaletteWith the bad weather persisting I have taken these last few weeks to experiment with new way in the development of narrowband shots

Primaluce Eagle 4S also adds an incredibly fast and powerful Thunderbolt 3 port with USB-C type connector allowing connections up to 40 Gbps with more connectivity options

High-Quality substrate: Astronomik filters are made with stress- and striae-free

Parfocal: No refocusing is needed when switching filters due to precise thickness tolerances

Film photography: Reasonable

All substrates are made to exactly the same thickness