Barlow Lens Baader Planetarium 2.25X/1.3X Q-Classic HT 1.25″

Baader Planetarium 2.25x/1.3x Q-Classic HT 1.25″ Barlow Lens

Looking for a Barlow lens that adapts to your observing style - not the other way around? The Baader Planetarium Q-Classic HT Barlow lens in the standard 1.25″ size is exactly the kind of accessory that every astronomer will appreciate, from an enthusiastic beginner to an experienced observer of planets and double stars. Its clever design gives you three different ways to use it, each with a different magnification factor, making it a genuinely versatile tool for a wide range of astronomical situations.

Three magnification modes in one accessory

The key advantage of this Barlow lens is its flexibility. In the standard configuration - inserted as a complete unit into your focuser with a 1.25″ eyepiece - you get a magnification factor of 2.25x. This is ideal for planetary observing, where you want to get the most out of your telescope without unnecessary compromise. You achieve the same result when using the optical element in the Baader Q-Turret revolving eyepiece adapter, available separately as part of the Baader accessory range.

The third option is particularly elegant. You can screw the optical element directly into the filter thread of your eyepiece - the standard M28 thread. In this configuration, the magnification factor changes to 1.3x. This is an excellent choice when you want only a modest increase in magnification without significantly reducing the exit pupil or amplifying atmospheric turbulence. More experienced users who enjoy fine-tuning their eyepiece setup will find this option especially useful.

HT coatings - equivalent to FMC

The Baader Q-Classic HT Barlow lens features high-transmission anti-reflection coatings, labelled HT (High Transmission), which are equivalent in performance to FMC (Fully Multi-Coated) coatings. These coatings minimise light loss as light passes through the optics and suppress unwanted reflections and ghost images, preserving high image contrast throughout. The result is a sharp, bright image with natural colour - no unwanted purple fringing or loss of fine detail that cheaper Barlow lenses without quality coatings often produce.

For astronomers focused on planets, the Moon, or double stars, this brings a real practical benefit. When studying the cloud bands of Jupiter or the Cassini Division of Saturn, you will notice that this Barlow lens adds no unwanted artefacts to the image, and light loss is kept to an absolute minimum.

Compatible with most telescopes and eyepieces

The lens fits the standard 1.25″ size, which means it is compatible with the vast majority of modern telescopes. Combined with the Baader Q-Turret revolving adapter, it becomes part of a modular system that lets you switch quickly between different eyepieces and magnification settings at the telescope - no need to rummage in your pockets in the dark. The M28 filter thread for direct mounting into an eyepiece is also a widely used standard, so compatibility should not be an issue.

Who is this Barlow lens for?

Whether you are planning a dedicated planetary observing session or want to explore every crater on the Moon, this Barlow lens from Baader Planetarium gives you the flexibility and optical quality you can rely on. It is a thoughtfully designed and precisely built accessory - and the more experience you gain in astronomy, the more you will value what it offers.

Key features at a glance

• Three modes of use: 2.25x (full unit in focuser), 1.3x (optical element in eyepiece filter thread), and 2.25x (optical element in Q-Turret adapter)
• HT anti-reflection coating - equivalent to FMC (Fully Multi-Coated)
• Minimal light loss and suppressed ghost images
• Standard 1.25″ barrel size - fits most modern telescopes
• M28 filter thread for direct screwing into an eyepiece
• Compatible with the Baader Q-Turret revolving eyepiece adapter
• Suitable for planetary observing, the Moon, and double stars

Technical specifications