The part that decides whether pointing is a pleasure · review
A straight-through 6x30 optical finder with a crosshair and a wide field, described by the maker as gathering eighteen times more light than the unaided eye.
The bottom line A modest, honest finder whose headline claim is one of the few on this site that survives being checked.
Thirty millimetres of objective at six times. That produces a 5 mm exit pupil — the same figure a 10x50 binocular gives — which is why a 6x30 shows stars that a 5x24 does not.
Eighteen times more light than the eye. Light grasp scales with the square of the aperture; a 30 mm objective against a dark-adapted pupil of about 7 mm gives roughly eighteen. The arithmetic holds, which is worth saying on a shelf where most headline figures do not.
It turns a finder from something that points roughly at a target into something that centres it. On a telescope with a narrow field, that difference is what makes the finder useful at all.
Field of view, and how it attaches. The second matters: finder shoes are not standardised between makers, and a finder without a matching bracket is an ornament.
German, French, Italian and Spanish Amazon stores ran from 44 € to 48 € on the day of the survey.
British Amazon store lists it in local currency, which the euro range above sets aside.
American Amazon catalogue holds a record for it that nobody is selling.
Figures as Keepa reported them on the day this page was last updated. Stock and pricing shift without warning.
Prices quoted in this text were read on 17 September 2026. The live price is at the top of the page.
| Aperture | 30 mm |
|---|---|
| Magnification | 6x |
| True field of view | Described as large; no figure is published |
| Image orientation | Straight through |
| Bracket fitting | Not published by the maker. |
| Reticle illumination and eye relief | 5 mm — 30 divided by 6 · Crosshair |
| Amazon reference | B018LIO1CA (same reference on 6 Amazon marketplaces) |
| EAN | 4049467483748 |
It is consistent arithmetic. Light grasp goes with the square of the diameter, and a 30 mm objective against a roughly 7 mm dark-adapted pupil gives a ratio of about eighteen. It describes any 30 mm optic, not this one in particular.
Straight is quicker to aim and awkward near the zenith. An angled finder costs more and solves the neck problem — the choice depends on how high the telescope usually points.
9x magnification · 50 mm objective · 90° viewing angle
A 9x50 angled finder with achromatic multi-coated optics, a 90-degree viewing angle and two-screw-and-spring alignment.
Best for: A telescope that regularly points high, where a straight finder is painful to use
≈ $69 / £72 / €95
8x · 50 mm · illuminated reticle · upright image
An 8x50 finder with an illuminated reticle and an upright image, listed in two short lines.
Best for: Centring faint objects, where a dark crosshair on a dark sky is unusable
≈ £149 / €146
9x · 50 mm · correct image · crosshair · rings included
A 9x50 right-angle finder with a multi-coated achromatic objective, a prism that delivers a correctly oriented image and a crosshair eyepiece, supplied with clamping rings.
Best for: Anyone who wants the finder view to match the chart without mental gymnastics
≈ €53
