TS-Optics Photoline SD-APO 125 mm f/7.8 - Doublet FPL-53 / Lanthane

TS-Optics Photoline SD-APO 125 mm f/7.8 - Doublet FPL-53 / Lanthane

Visit TS-Optics Photoline SD-APO 125 mm f/7.8 represents one of today's best compromises between optical performance, visual/photographic versatility and transportability. Thanks to a carefully optimized doublet lens combining a FPL-53 Ohara (Japan) and one element in the lanthanum, In addition, this telescope offers remarkable chromatic correction, comparable to that of many triplets, while retaining the mechanical and thermal simplicity of a doublet.

Designed without compromise, the Photoline APO from TS-Optics focuses on real quality: optics, mechanics and ergonomics are all at the same level, for both demanding visual observation and modern astrophotography.

Optics that stand out from conventional ED doublets

The objective doublet air-spaced FPL-53 / lanthanum provides far superior chromatic control than conventional two-lens ED glasses.

In the field, this translates into :

• From perfectly neutral stars, even on bright targets
• A high contrast in deep sky, with appreciable brightness
• Fine, clean lunar and planetary rendering without colored bangs

User feedback confirms visual correction significantly higher than that of conventional 120 ED, and an image judged by many observers to be the best they have obtained in this diameter range, excluding the much more expensive premium instruments.

125 mm: the ideal compromise diameter

Diameter 125 mm is often considered the optimum balance point for an apochromatic telescope:

• Clear gain in brightness and resolution over a 100-102 mm
• Weight content (7.57 kg with clamps), compatible with reasonable frames (EQ5, AVX, heavy AZ)
• Shorter, better-balanced tube than equivalent triplet

Faced with Photoline 102 mm, The 125mm version offers a perceptible gain in deep-sky and planetary images,
while maintaining excellent transportability. For many users, it is a natural evolution when a 100 mm becomes limiting, without falling into the constraints of a 140-150 mm.

High-end mechanics: focuser 2.5″ Rack & Pinion Photoline

The scope is equipped with one of the best eyepiece holders in its class:

• Focuser 2.5″ Rack & Pinion Photoline dual-speed
• 360° rotation, ball bearings
• Load capacity up to 5 kg without bending
• Direct thread M68x1 for correctors and gearboxes
• 2″ and 1.25″ self-centering clamping rings

This focuser is often compared, in the field, to the FeatherTouch FTF25 models, with very similar rigidity and smoothness, making it an excellent choice for heavy photo configurations (cooled cameras, filter wheels, correctors).

Astrophotography: ready for full format

Associated with TS Photoline 0.8× reducer/corrector With its dedicated design, the Photoline 125 makes an excellent photo frame:

• Focal length reduced to f/6,24
• Field perfectly corrected up to full format
• Threaded rigid connection (no accessories inserted)
• Standard 55 mm backfocus, compatible with DSLR and astro cameras

This modularity enables uncompromising visual use, followed by a simple and efficient transition to deep-sky imaging.

Technical specifications

In a nutshell

Visit TS-Optics Photoline SD-APO 125 mm f/7.8 is an exceptional eyewear in its price range:

• High-level chromatic correction
• All-round visual/astrophotographic versatility
• Perfect mechanics
• Excellent compromise between diameter and transportability

A particularly relevant choice for the discerning observer who wishes to a significant step up from a 100-102 mm, without the mechanical and financial constraints of heavy, large-diameter triplets.

For eyewear lovers, satisfaction guaranteed!