Search results for: '30mm f/4'

Housed in a 2" barrel like the 35mm, the 27mm is lighter & smaller. It's perfect for any telescope size, type or spe...

This Sky-Watcher 120mm (4") f/5 telescope is a two-element, air-spaced, fully multi-coated objective, achromatic refract...

This Sky-Watcher 120mm (4") f/5 telescope is a two-element, air-spaced, fully multi-coated objective, achromatic refract...

For Epsilon-130D users who want to shoot at longer focal lengths than the native 430mm, Takahashi offers a 1.5x extender...

TS-Optics 1.25" extension tube, 35mm length w/ brass compression ring...

Herschel-wedge / Solar-wedge for superior White-Light solar observing and imaging. For refractor-telescopes up to 150mm...

The 35mm has a large true field with plenty of eye relief for eyeglass wearers.  When combined with a Paracorr to c...

This popular 120mm (4.75") f8 Achromat Refractor is one of the best introduction to astronomy available. ...