Askar 151PHQ Flatfield APO Astrograph

Description

<![CDATA[The Askar 151PHQ is the flagship of the PHQ family — a massive 151mm flatfield astrograph and the largest refractor in the Askar/Sharpstar lineup. With its built-in quadruplet field flattener, it delivers flat, sharp stars across the entire field without any external correctors.

At 151mm aperture, the 151PHQ gathers significantly more light than its smaller siblings, making it ideal for capturing faint deep-sky detail in galaxies, nebulae, and star clusters. The long focal ratio provides high-resolution imaging while the self-flattening optical design keeps the workflow simple — no backfocus calculations, no adapter stacks, just connect your camera and shoot.

This is a premium instrument for serious astrophotographers who want maximum aperture in a refractor with the convenience of a fully integrated optical system. Each unit is individually optically tested.

Key Features

• 151mm aperture — largest refractor in the Askar lineup
• Built-in quadruplet field flattener
• No external flattener or backfocus calculations needed
• ED glass elements for superior chromatic correction
• Each unit individually optically tested
• Premium build quality throughout

Specifications

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