Seeing the Pleiades through a telescope

Six or seven blue-white stars to the naked eye, dozens in binoculars. Too big for most telescopes to frame — this is a target where more aperture actively makes things worse.

2 mmDetectable
16 mmRecognisable
238 mmDetailed

Millimetres of aperture to reach each level. Observing heuristics, quoted at Bortle 4 and adjusted per class of sky — somebody else's eyes, somebody else's night.

Through three telescopes, under a suburban sky

Each circle is the true field of a 25 mm eyepiece. Same target, same sky; only the aperture changes.

70 mm · 20×

Recognisable

130 mm · 36×

Recognisable

250 mm · 70×

Detailed

The aperture it takes, by sky

Millimetres of aperture to reach each level. Observing heuristics, quoted at Bortle 4 and adjusted per class of sky — somebody else's eyes, somebody else's night.

Level	Milky Way blazing	Milky Way, barely	No Milky Way
Detectable	1 mm	2 mm	3 mm
Recognisable	8 mm	16 mm	25 mm
Detailed	125 mm	238 mm	377 mm

What it takes to see it

The cheapest model in the catalogue that reaches each level under the suburban sky of the views above (Bortle 6), at its observed price. The thresholds are observing heuristics, not optics; a darker sky needs less, and the table above says how much.

50 mm · 10×

Recognisable · from 16 mm

Bresser Hunter 10×50

€50 seen 7 Oct 2026 at Astroshop

The cheapest 10×50 worth owning. Softer at the edge of the field than the Celestron, lighter in the hand, and half the price of a bad telescope.

See it at Astroshoppaid link

Also search at First Light Optics · Optique Unterlinden · Pierro Astro · Teleskop-Express

254 mm · 50×

Detailed · from 238 mm

Omegon Advanced X N 254/1250

€622 seen 7 Oct 2026 at Astroshop

24.4 kg in all, of which the tube is 15 kg. One eyepiece in the box: the 25 mm gives 50× on 254 mm, an exit pupil of 5.1 mm, and any higher power needs a second eyepiece bought separately. The fan behind the mirror runs on 12 V, and the listing's contents name no power source for it. At f/5 it needs collimating before it shows what it can.

See it at Astroshoppaid link

Also search at First Light Optics · Optique Unterlinden · Pierro Astro · Teleskop-Express

What more aperture buys

The nebulosity around Merope and its neighbours is real but faint: it needs about 150 mm at low power and a very dark sky.

When to look

Winter evenings in the northern hemisphere.

Open this view in the simulator Which telescope reaches it?