HR Planetary 4mm - High End eyepiece for telescopes - 1.25" - long eye relief - 58° field of view HR Planetary eyepieces are probably amongst the most versatile eyepieces available today. Despite its many possible applications no compromises have been made in the performance. The eyepieces are perfectly suited for observing planets, the moon, deep sky objects as well as for projection photography with DSLR or compact digital cameras. -- Observing the Moon and the Planets ... a very high contrast and image definition, especially on the optical axis, make the HR Planetary eyepieces the ideal companion for demanding planetary and lunar observing. Due to the very good viewing comfort you can see even finer details without having to strain your eyes. -- Observing Deep Sky Objects: Nebulae and Galaxies ... compact Deep Sky Objects are often difficult to see because they are often very faint. The HR Planetary eyepieces are fully multicoated and offer a high image definition for a bright and clear image. This makes them ideal for observing such compact objects. HR Planetary Eyepieces ... Perfect Viewing Comfort HR Planetary eyepieces were made for best possible sharpness and contrast on the optical axis, as can be expected from good planetary eyepieces. Quite different from most other planetary eyepieces however the HR eyepieces also have a very good viewing comfort, a long eye relief and a larger field of view. Each HR Planetary eyepiece has an eye relief of 16 millimetres!
M**.
not cheap, but a good short focal length eyepiece 4mm won't be cheap.
Considering I have pushed the magnification on a small scope with a 2.25x barlow on a 80mm achromatic fl400 above its practical limit with this lens have to give it 5 stars. Cant expect too much with small scope but get the poles on mars well one of them and suggestion of surface detail. goes rather grey at high mag but cants see much chromatic abberation. lens works well on its own too or rather without the barlow. plan to test with another scope or two soon.
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