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Brand

POFET

Two eyepiece-end parts

Where these parts go

Both fit at the eyepiece end. The collimating eyepiece is a sighting tube used to align a Newtonian’s mirrors; the solar filter threads into the eyepiece barrel.

The distinction the solar shelf turns on

A full-aperture filter covers the front of the telescope and rejects the energy before it enters. An eyepiece-end filter sits where the light has already been concentrated. The page reports which this is, cites the standard the maker names, and refers to the instructions supplied — as every solar page on this site does.

What the listing describes

The solar filter’s bullet list describes focusing rather than filtering. The page notes that rather than filling the gap with a plausible sentence.

Reading a POFET page here

Look at where the part sits in the light path. On the solar shelf it is the whole question.

Everything POFET puts on these shelves, one page each

  • POFET 1 inch eyepiece-end solar filter in aluminium cell

    POFET Eyepiece-end solar filter

    A 1 in aluminium-celled solar filter that screws onto the eyepiece end of the light path rather than over the telescope’s aperture.

    Cell fit and outside diameter
    2.5 cm (1 in), from the title
    Film or glass construction
    Threads onto an eyepiece — it does not fit over the front of the telescope · Aluminium alloy with a standard thread, per the maker · The listing gives none anywhere in the listing
    Cited standard
    The listing gives none anywhere in the listing
    Mounting security
    Not published by the maker.
    Image colour
    Not published by the maker.
    Supplied storage
    Not published by the maker.
    Amazon reference
    B08M9HY7DC (same reference on 5 Amazon marketplaces)
    EAN
    0703355530153
    • An aluminium cell rather than a plastic one
    • A standard thread means it will engage a normal eyepiece barrel
    • No density, no transmission and no waveband figure of any kind is published

    Best for: Nobody, until the manufacturer’s own instructions and specification have been read

    ≈ £7
    Check price on Amazon
  • POFET metal collimator with 2 inch adapter

    POFET Metal collimating eyepiece with 2 in adapter

    A metal collimator with a triple-cemented lens and a built-in battery offering seven brightness levels, supplied with a 2 in adapter.

    Method
    Triple-cemented lens, per the maker
    Self-collimation ability
    Not published by the maker.
    Barrel fit
    1.25 in, with a 2 in adapter
    Play
    Not published by the maker.
    Brightness control
    Seven · Neither is published
    Target visibility
    Not published by the maker.
    Build
    Built-in battery, described as power-saving
    Suitable telescopes
    Newtonian, per the maker
    Amazon reference
    B08M9FRYXP (same reference on 5 Amazon marketplaces)
    EAN
    0703355530023
    • The maker describes the actual procedure rather than only the product
    • A built-in battery removes the CR2032 problem on a cold night
    • A built-in battery cannot be replaced when it eventually fails

    Best for: A Newtonian owner who would rather charge a tool than keep spare cells

    ≈ £23 / €26
    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.