Askar Apochromatischer Refraktor AP 203/1421 OTA

€9.455,00

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🔭 Askar 203mm Apochromatic Flagship Refractor OTA

Askar's largest apochromatic refractor: a 203mm optical tube that brings genuine large-telescope light-gathering power to a refractor design, aimed at advanced astrophotographers and observatories who want the clean, high-contrast optical path of a refractor at an aperture normally associated with reflectors.

🔭 203mm Apo Aperture ⭐ Flagship Askar Optics 📸 Large-Scale Imaging 🌌 Deep-Sky & Planetary Detail 🔧 OTA Only

⭐ Quick Overview

Best For

Advanced astrophotographers
observatories seeking refractor-quality optics at large aperture
imagers wanting minimal maintenance at scale

Observing Targets

Galaxies
nebulae
star clusters
high-resolution planetary imaging

Main Advantages

Very large aperture for an apochromatic refractor
clean optical path with no central obstruction
strong colour correction
straightforward long-term maintenance compared with mirror systems

Large-Aperture Refractor Performance

Refractors are valued in astrophotography for their unobstructed optical path, absence of diffraction spikes, and generally lower long-term maintenance compared with reflectors, since there is no mirror alignment to manage. Scaling these benefits up to 203mm aperture, as Askar has done with this flagship model, is a genuinely significant engineering achievement, delivering large-aperture light grasp with refractor-quality star images.

This combination makes the 203/1421 a compelling choice for advanced imagers and observatories who want to move up in aperture without taking on the added collimation and maintenance considerations of a large mirror-based system.

🌌 What Can You Image With The Askar 203/1421?

🌌 Galaxies

Substantial light-gathering power resolves fine detail in both large and compact galaxies.

✨ Nebulae

Rich detail and colour fidelity across a wide range of nebula types.

🪐 High-Resolution Planetary Imaging

Long focal length well suited to detailed planetary work.

💡 Why Large-Aperture Apochromats Are Rare And Valuable

As aperture grows, controlling chromatic aberration and lens weight in a refractor becomes significantly harder, which is why large apochromats are comparatively rare and typically reserved for flagship product lines. The 203/1421 represents Askar's answer to this challenge, bringing genuine large-aperture performance to a refractor design.

🏆 Engineered For Long-Term Reliability

🏆 No mirror collimation required

🔬 Multi-element apochromatic correction for excellent colour fidelity

📸 Suited to large-format modern astronomy cameras

🌡️ Robust construction for long-term observatory use

⭐ A Genuine Step Up For Serious Imagers

For imagers who already own a mid-sized apochromat and want considerably more aperture without switching to a reflector-based system, the Askar 203/1421 offers a rare and compelling large-refractor option.

🎯 Perfect For

📸 Advanced Astrophotographers

Large-aperture refractor performance for serious imaging projects.

🏛️ Observatories

Refractor-quality optics with comparatively low long-term maintenance.

⭐ Imagers Upgrading From Mid-Sized Apochromats

A natural, significant step up in aperture.

📸 Built For Serious Imaging Projects

Sold as an optical tube assembly, the 203/1421 is intended for use with a heavy-duty equatorial GoTo mount and a high-resolution astronomy camera, forming the optical centrepiece of an advanced deep-sky or planetary imaging setup.

💡 Usage Tips For Best Results

Use a mount rated well above the combined weight of the tube and imaging equipment.
Allow the large lens ample time to reach ambient temperature before critical focusing.
A field flattener/reducer matched to the optical design is recommended for the flattest field.

📊 Technical Specifications

Brand	Askar
Model	203/1421 Apochromatic Refractor
Optical Design	Apochromatic Refractor
Aperture	203mm
Focal Length	1421mm
Delivery Format	Optical Tube Assembly (OTA), mount not included
Recommended Use	Observatory / advanced imaging installation

📦 Included Accessories

📦 203/1421 optical tube

📦 Tube rings & dovetail bar

📦 Transport case

📦 Manual

❓ Frequently Asked Questions

❓ Does this include a mount?

No, it is sold as an optical tube assembly for use with a heavy-duty equatorial GoTo mount.

❓ Why choose this over a large reflector?

It offers refractor-quality optics with no mirror collimation and no diffraction spikes.

❓ Is this suitable for a first telescope?

No, it is intended for advanced imagers with existing mount and imaging experience.

⭐ Why Buy From MJKZZ?

✅ Genuine Askar product

🚚 Fast European shipping

🔒 Secure payment options

💬 Expert customer support

📦 Carefully packed shipment

Within the EU, the goods usually arrive within a few working days. Deliveries outside of the EU can take from just over a week to two weeks. Even an exchange or return within 14 days can be handled more quickly, cheaper and less complicated on the MJKZZ.DE page, if the items only need to be sent back to Germany/Austria. For large orders OUTSIDE of EU contries, it is possible that the shipping costs need to be calculated manually becasue of insurance. But we only charge the real shipping costs!

If you are ordering OUTSIDE of EU: Please contact us to place your order without VAT. We will send you an invoice excluding 20% tax.