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ASToptics

Heater strips and threaded adapters

The heater

A strip wraps around a tube and holds the optics above the dew point. What decides whether it works is its length against the tube’s circumference and its power draw against the supply — both published here.

Why length is the specification

A strip too short leaves a cold arc, and dew forms there first. On this shelf the page prints the length and the tube sizes it suits, because “fits most telescopes” cannot be checked against anything.

The adapter

An M54 male to T2 female coupling. Its whole specification is two thread designations and the optical path it adds.

Reading an ASToptics page here

Measure the tube before reading the price. Dew control is the one accessory shelf where the wrong size does nothing at all.

Everything ASToptics puts on these shelves, one page each

  • ASToptics HazeAway 30 cm dew heater strip on a telescope tube

    ASToptics HazeAway USB heater strip 30 cm (49556)

    A 30 cm dew heater strip that wraps around the tube and runs from common 12 V power sources, for long observing and imaging sessions.

    Tube fit
    Not published by the maker.
    Outside diameter
    Not published by the maker.
    Shield length
    30 cm; the maker states other lengths exist for other apertures
    Construction
    Electrically heated dew strip — it warms the tube rather than shielding it
    Heater width
    Described as even
    Power draw
    Compatible with common 12 V sources, per the maker · The listing gives none
    Controller support
    Not published by the maker.
    Cable
    USB, from the product name
    Connector
    Not published by the maker.
    Amazon reference
    B0BPXKKMVC (same reference on 6 Amazon marketplaces)
    EAN
    4049467495567
    • A heater works where a shield fails: on a night when dew forms regardless
    • Several lengths exist, so the strip can match the tube circumference
    • No power draw figure, which is what decides battery life

    Best for: Imaging sessions where a shield alone does not keep the corrector clear

    ≈ £91 / €103
    Check price on Amazon
  • ASToptics M54 male to T2 female adapter

    ASToptics M54 male to T2 female adapter (57801)

    A thread adapter from M54 male to T2 female, whose entire listing consists of generic statements about quality.

    Slot count and filter size
    M54 male, from the title · T2 female, from the title · Not stated for either thread
    Optical path length
    The listing gives none
    Manual or motorised operation
    A thread adapter — no optics, and not a filter wheel
    Light sealing
    Not stated
    Power
    Not published by the maker.
    Software support
    Not published by the maker.
    Amazon reference
    B0BPXFY2VT (same reference on 5 Amazon marketplaces)
    EAN
    4049467578017
    • M54 to T2 is a conversion the larger imaging trains genuinely need
    • From a maker whose range is sold through astronomy specialists
    • Five bullets and not one measurement, material or figure among them

    Best for: An M54 imaging train that has to meet a T2 camera fitting

    ≈ £36 / €39
    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.