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  • TS-Optics APO 5x Barlow lens 31,8mm TS-Optics APO 5x Barlow lens 31,8mm

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TS-Optics APO 5x Barlow lens 31,8mm

Product code: TSB51

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Quick Overview

This short, apochromatic Barlow lens is an alternative to the use of eyepieces with short focal length for reaching high magnifications. 5x the focal length and magnification, with 3 lens apochromatic element. Fully multi-coated lenses with blackened edges, barrel size 31.8mm. All metal design, short length with precise lock by brass compression ring.

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if you pay by bank transfer €76.63


For high magnifications, like for observing moon and planets, you need to use short focal length eyepieces. These are often either very expensive or have a very narrow eye relief, making them rather uncomfortable to use. For astro-imaging with a large magnification you can do eyepiece projection, but this offers only a limited sharpness throughout the photographical field. The TS Optics APO Barlow lens is the ideal alternative for both applications.

Fields of Use:

The large magnification factor 5x turns for example a 25 mm Plossl eyepiece into a 5 mm eyepiece, while retaining the comfortable eye relief of the longer eyepiece. This is very comfortable for observing planets. For high magnification astro-imaging, like for webcam imaging of the planets, you could use eyepiece projection photography. The better alternative is the 5x Barlow lens because it offers a better field sharpness than typical eyepiece projection. Experience shows that for planetary imaging an effective focal ratio of f/25-f/30 is ideal. As a result this Barlow is the perfect match for most Newtonian telescopes.


Technical specifications:

- Magnification Factor: 5x - visual use
- Optical Layout: 3 element apochromatic design (air-spaced)
- Coating: Fully multi-coated
- Blackened Lens Edges: Yes. For suppression of internal reflections.
- Mechanical Quality: All metal design. Short length
- Clamp Mechanism: precise lock by brass compression ring

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