Takahashi Eyepieces

More Information  · Recommended Accessories Price $188.00 List Price $220.50 Field of view 52° Eye Relief 9mm Focal Length 5mm Number of optical elements 5 Barrel Size 1.25" Weight 4.5 oz Warranty 5 years Telescope Eyepiece Formula To calculate the magnification and approximate actual field of view of this eyepiece on your telescope, enter the focal length of your telescope below and press the "Calculate" button. mm

While it is a different design, this Takahashi is similar in its optical performance to a classical Abbe-type orthoscopic. It has the high contrast, low ghosting, flat field, and excellent edge to edge image sharpness for which orthos are famous – but has a 52° apparent field of view that far outstrips the 40-42° field more typical of a conventional ortho.

The 5mm Takahashi makes an excellent lunar and planetary eyepiece with scopes of all optical types – fast focal ratio apochromatic refractors, Schmidt-Newtonian and Dobsonian reflectors, and more. Its high contrast and low ghosting also excel at splitting close binary star pairs and resolving globular clusters. It typically provides the maximum useful power with an f/10 Schmidt-Cassegrain. It generally provides excessively high powers with scope focal ratios longer than f/10 and is not recommended for scopes in this range, except for limited periods of lunar and planetary observing during exceptional seeing conditions.