TS-Optics Optics 2" Barlow - 2,5x APO 4-Element Design: detailed overview

TS-Optics Optics 2" Barlow - 2,5x APO 4-Element Design is correctors, reducers and Barlow lenses deliberately change image correction, focal length or field of view. The accessory must match the telescope design and intended sensor or eyepiece. Key product data include Design: Telezentrische Barlowlinse; Verlängerungsfaktor: 2,5fach; Linsen: 4 multivergütete Linsen. The important point is not a single specification on its own, but the way optics, mechanics and intended use work together.

With photographic correctors, working distance is critical. Even a few millimetres of spacing error can visibly reduce star quality toward the edge. This makes it easier to choose the product for a real observing or imaging task rather than simply chasing the highest specification.

Who is it for?

• Astrophotography with a compatible telescope
• Optimising field correction or focal length
• Users wanting a targeted upgrade to an existing optical system

Technical features from the product data

• Design: Telezentrische Barlowlinse
• Verlängerungsfaktor: 2,5fach
• Linsen: 4 multivergütete Linsen
• Einsteckdurchmesser: 2"-Steckhülse an der Teleskopseite mit M48-Filtergewinde
• Anschluss an der Okularseite: 2" und 1,25" mit Ringklemmung
• Weight: 312 Gramm
• Länge: 93 mm

Practical use, selection and system planning

Plan backfocus, threads and sensor spacing as one complete chain before buying. For visual focal extenders, also consider realistically useful magnification. When building the complete setup, also consider existing connections, weight, working distances and equipment you already own. A clean mechanical system is easier to use and simpler to expand later.

Our recommendation

Choose accessories and upgrades for the actual application rather than theoretical maximum values. A well-matched system is usually more capable and more pleasant to use than a combination where components only just fit together.

Related products and alternatives

If you would like to compare alternatives or related equipment, these products are worth a look: TS-Optics Optics TSB22 2fach-Barlowlinse, 2 Zoll - ED Element - BIG BARLOW  ·  TS-Optics Optics TSB51 Apo-Barlow-Linse 5fach - apochromatisch, 1,25 Zoll  ·  TS-Optics 2x APO Barlow Lens 1.25"