At a Glance
6mm
Focal Length
58°
Apparent FOV
12mm
Eye Relief
1.25"
Barrel Size
Score Breakdown
Overview
The Astromania Planetary 6mm is a short focal length eyepiece aimed at observers who want to push magnification for planetary work without spending a lot. At 6mm, it pairs well with most mid-range refractors, reflectors, and SCTs to deliver the kind of detail needed for resolving lunar craters, Saturn's rings, or Jupiter's cloud bands. The 58-degree apparent field of view is respectable at this price point, and the 16mm of eye relief is genuinely comfortable, especially for eyeglass wearers who often struggle with short focal length eyepieces.
The five-element, three-group optical design uses fully multi-coated glass to reduce scatter and chromatic fringing, and the blackened lens edges help cut internal reflections that can wash out contrast on bright targets. At $49.99, this is a competitive option for a dedicated planetary eyepiece, and the 4.5-star rating across 211 Amazon reviews suggests consistent quality control. That said, at 6mm you will be working at high magnification, so seeing conditions matter.
On nights of poor atmospheric stability, even a good eyepiece at this focal length will show a blurry image. The rotating barrel is a practical touch for adjusting comfort at the eyepiece.
Key Features
- 6mm focal length delivers high magnification suited for planetary and lunar detail work
- 58-degree apparent field of view provides good visual context even at short focal lengths
- 16mm eye relief is unusually generous for a 6mm eyepiece, comfortable for eyeglass wearers
- Fully multi-coated five-element optics improve contrast and reduce chromatic aberration
- Blackened lens edges and treated internal surfaces suppress stray light and reflections
- Rotating barrel and foldable rubber eyecup allow easy viewing position adjustment
- Compatible with any standard 1.25-inch focuser and accepts 1.25-inch filters
Specifications
| Focal Length | 6mm |
| Apparent FOV | 58° |
| Eye Relief | 12mm |
| Barrel Size | 1.25" |
| Design | Planetary |
| Elements/Groups | 5/3 |
| Series | Planetary |
| Coating | Fully Multi-Coated |
| Waterproof | No |
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Amazon Reviews
I bought this EP on an advertised Clearance over inventory sale for $30 dollars and wow its a keeper, great quality and excellent performance even for its regular price of $60. Yes these are copies of the Original Tomas Black Planetary EP's and there is all kinds of scuttle but going around the inte...
You know how some eyepieces seem to "snap" into focus? And how fun they are to use? Do you have a drawer full of low-grade eyepieces that have a muddy, incoherent focus? False color? Will not allow the usable magnification for your telescope? This Astromania 1.25" 4mm 58-Degree Planetary Eyepiece is...
I'll start with the eyepiece for those who are interested in my thoughts on it. I reassembled the eyepiece after removing it from it's box (see photo) and waited for dark. Given I received an obviously returned item I don't know if it has any defects or not with regards to visuals. Viewing Saturn an...
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