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Baader Planetarium

Two products at the top of their shelves

A zoom judged at both ends

The specification that matters for a zoom eyepiece is the apparent field at the short end and at the long end, because most zooms give a narrow field where they are least useful. Publishing both is what separates this one on its shelf, and the page quotes them as published.

Parfocality

Whether the eyepiece holds focus through the zoom range is the other question the shelf is compared on. It decides whether zooming is a continuous action or a series of small refocusings.

The finder

A red dot finder, judged on reticle type, brightness adjustment, battery and bracket fitting like the rest of its shelf.

Reading a Baader Planetarium page here

The published figures are unusually complete. That is the reason to read the page, and it is also what makes the price legible.

Baader Planetarium in this catalogue

Everything Baader Planetarium puts on these shelves

  • Baader Planetarium SkySurfer III red dot finder

    Baader Planetarium SkySurfer III

    A red dot finder with a 30 mm clear aperture rather than the usual 20 mm, dew shields at both ends and a coated 1:1 objective that dims the sky less.

    Reticle type
    Not published by the maker.
    Brightness adjustment
    Adjustable brightness
    Bracket fitting
    Standard finder shoe, telescopes, larger telescopes, binoculars and spotting scopes
    Battery type
    Not published by the maker.
    Life
    Not published by the maker.
    Window size
    30 mm, against the 20 mm of common alternatives per the maker · 1:1 anti-reflection coated, dimming the sky less than rivals per the maker
    Alignment adjustment
    Not published by the maker.
    Amazon reference
    B001ILJCCC (same reference on 6 Amazon marketplaces)
    EAN
    4047825007568
    • A 30 mm clear aperture shows considerably more sky than the 20 mm standard
    • Dew shields at both ends, which no other red dot finder here has
    • Considerably more expensive than the plain red dot finders on this shelf

    Best for: Anyone whose red dot finder keeps dewing over or washing out the sky

    ≈ $70 / £46 / €49
    Check price on Amazon

Any figure written into the body of this page was true on the day it was written. The amount shown next to each instrument is requested from the retailer as the page loads, and it is that amount, not the text, that stands.