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  • 1.25"SVBONY Plossl 40mm Eyepiece FullyMulti Green Coated For Astronomy Telescope

    SVBONY 1.25" Plossl 40mm Multicoated Eyepiece. Type: Plossl Eyepiece. Focal Length: 40mm. UK&ES&FR&IT site. Apparent Field of View: 40-Deg. 2 set of four slices of multilayer film gluing lens. A:Overseas Warehouse Local Dispatch.
    £11.99
    From China
    £0.50 postage
    or Best Offer
    Only 1 left!
  • Orion 08711 Shorty 1.25 Inch 2x Barlow Lens with T42 thread adapter - Buy It Now

    This doubles the number of eyepieces in your collection. They allow greater, more comfortable eye relief at high magnifications than the equivalent shorter focal length eyepieces allow. In addition, barlows can increase the contrast of extended deep-sky objects by dimming background sky glow.
    £14.00
    Brand: Orion
    £5.00 postage
    69 sold
  • 4 PIECE BASIC ASTRONOMY TELESCOPE EYEPIECE LENS SET 4mm,6mm,12mm,20mm 1.25" INCH

    What Magnification is this Eyepiece?. The magnification produced by an eyepiece depends on the optical system it is used in. For example, a 1000mm scope tube used with a 10mm eyepiece gives 1000/10 = 100x magnification.
    £19.94
    Top Rated Plus
    £7.00 postage
    320 sold
  • Pentax XF-8.5mm eyepiece (1.25" fit)

    This eyepiece has the standard astronomical 1.25" fitting. It also uses low dispersion lanthanum glass to provide high resolution images with minimal aberrations. The rubber eye-cup is the twist up/down type.
    £49.00
    0 bids
    £14.62 postage
    Ending 24 Sep at 9:00PM BST5d 20hBrand: PENTAXCustoms services and international tracking provided
  • Pentax XF-12mm eyepiece (1.25" fit)

    This eyepiece has the standard astronomical 1.25" fitting. It also uses low dispersion lanthanum glass to provide high resolution images with minimal aberrations. The rubber eye-cup is the twist up/down type.
    £49.00
    0 bids
    £14.62 postage
    Ending 24 Sep at 9:09PM BST5d 20hBrand: PENTAXCustoms services and international tracking provided
  • 2-inch ED x2 Astro Barlow lens

    2X Barlow lens 2" fitting. Used in conjunction with another eyepiece it will double the magnification. The other eye piece can be either 2" or 1 1/4", as an adaptor is included. Note there is no manufacturer identification on this lens.
    £8.50
    3 bids
    £12.58 postage
    Ending Saturday at 5:13PM BST3d 16hCustoms services and international tracking provided
  • Vixen NPL Plossl Eyepiece - 20mm

    This great little Vixen 20mm npl eye piece let's in the light and comes with end caps and box... I've collected far too many over time and this one is now surplus to requirements... Will post UK only and but must pay full postage which will be about £3 to 4 Any questions please message me...
    £17.00
    2 bids
    £13.19 postage
    Ending Saturday at 3:33PM BST3d 15hBrand: VixenCustoms services and international tracking provided
  • 8 Piece Accessory Kit With Eyepiece Lenses & Filters Astronomy Telescope In Case

    Telescope Eyepiece and Filter Set Which features Coated optics and Internal thread for fitting filters. The set comprises: 4mm, 5mm, 9mm and 15mm lenses plus 4 filters one moon filter and 3 others which I can't remember what they are! Comes in a solid carry case with foam inserts and features a lock and two keys. Unlike most lenses in this price range they have a thread for attaching filters.
    £25.95
    1 bid
    £14.36 postage
    Ending 27 Sep at 6:02PM BST8d 17hCustoms services and international tracking provided
  • Meade 5x TeleExtender

    Almost brand new Meade 1.25” 5xTeleExtender. Pristine condition. Original dust caps. A more extended description can be found here. http://www.excelsis.com/1.0/entry/meade-5x-5000-series-telextender-27-39.html?PHPSESSID=7ed1d912e20f9ef63149638c9a59fec1
    £5.00
    0 bids
    £12.53 postage
    Ending 26 Sep at 12:16PM BST7d 11hBrand: MeadeCustoms services and international tracking provided
  • 1.25" 8mm BST Explorer Dual ED eyepiece Branded "Starguider"

    BST Starguider 1.25" 8mm 60 degree ED eyepiece. This high contrast makes it a good choice for splitting close binary stars, for examining low contrast lunar and planetary detail, and for finding small and faint planetary nebulae against a truly dark sky background.
    £39.99
    £6.00 postage
    185 sold
  • 1.25" TAL 3x Barlow Lens for Telescope with Brass Compression Ring No Reserve

    A 1.25" 3x barlow lens by the highly regarded Russian manufacturer TAL. This is the rarer model which has a brass compression ring rather than the more common screw to protect eyepieces from being scratched.
    £7.50
    8 bids
    £10.50 postage
    Ending Sunday at 8:11PM BST4d 19h
  • SVBONY 1.25"Telescope 0.5 Focal Reducer Threads M28x0.6 for 31.75mm Eyepiece NEW

    Thread interface: M28x0.6 pitch (Fine Thread). Focal Reducer: 0.5X. Fits all standard 1.25" scope eyepieces. Color: Black. —Wireless calling paging system.
    £5.99
    From China
    Free postage
    or Best Offer
  • Micro Telescope Eyepiece Lens SR4mm Focal Length 0.965"/24.5mm for Astronomy

    Fully Coated:high quality optical glass for maximum brightness. Unisex PVC Mannequin Foot Anklet Soc. Buy It Now. 5pcs/lot Horizontal Office Work Card. 7T 25H Clutch Drum Bell Housing 47cc.
    £4.91
    From China
    Free postage
  • 1.25" TAL Eyepiece (25mm Plossl, 15mm Kellner) and Filter Set for Telescope NR

    1.25" TAL 25mm Plossl Eyepiece. 1.25" TAL 15mm Kellner Eyepiece. The set contains the following 6 x 'clip' on TAL Colour Filters (these clip onto the top of the eyepieces). Cross Hair Reticule which threads onto the bottom of eyepiece (see last picture).
    £12.50
    9 bids
    £10.50 postage
    Ending Sunday at 8:12PM BST4d 19h
  • BST Starguider 50mm Mini Guide Scope

    Consisting of a 50mm aperture, 162mm focal length (f/3.2) achromatic refractor guide scope, an adjustable dovetail guide scope bracket, the Starguider Mini 50mm Guide Scope makes it easy for any astrophotographer to enjoy the precision of autoguiding in their celestial photos.
    £49.99
    £8.00 postage
  • Durable 1.25" 2X Double Barlow Lens Fully Multi-coated For Telescope Eyepiece GW

    1 Barlow lens. Lens material: pure optical glass lens. Magnification factor: 2X. Cell phone Accessories. Kids &Baby accessories. Sport & Travel. Clearance --20%. If you are satisfied with our service, pls.
    £7.99
    From Hong Kong
    £0.99 postage
    or Best Offer
    80 sold
  • Durable 1.25inch 4mm Plossl Fully Coated HD Eyepiece SS For Astronomy Telescope

    Type: 4mm Plossl Eyepiece. 1 4mm Plossl Eyepiece. It will bring you impressive scenery. Hope you enjoy your life. Focal Length: 4mm. If you do not receive our reply within 48 hours, pls.
    £4.29
    From Hong Kong
    £0.99 postage
    or Best Offer
  • CELESTRON PowerSeeker Accessory Kit 94306 w/2 Eyepieces., 3 Filters, Carry Case

    Celestron Product Number: 94306. Celestron Accessories Two Year Limited Warranty. You'll find extra power eyepieces, the most-used planetary filters and even a cleaning cloth. Fully-coated eyepieces for higher magnification.
    £37.26
    Est. delivery dateEst. delivery Fri, Sep 21
    FAST & FREE
    From United States
    Only 1 left!
    Brand: Celestron
  • 1.25'' 25mm BST Explorer Dual ED eyepiece Branded ''Starguider''

    BST Starguider 1.25" 25mm 60 degree ED eyepiece. This high contrast makes it a good choice for splitting close binary stars, for examining low contrast lunar and planetary detail, and for finding small and faint planetary nebulae against a truly dark sky background.
    £39.99
    £6.00 postage
    199 sold
  • 1.25"/31.7mm Metal 5X Barlow Lens Thread M42 *0.75 Pitch for Telescope Eyepiece

    The Barlow lens´ role is not only to improve the image quality, but also viewing comfortably. Thread Size: M42 0.75 pitch. 1 x 1.25" 5X Barlow lens. Magnification Factor: 5X. Barrel Size: 1.25" (31.7mm).
    £8.39
    From China
    £0.50 postage
    or Best Offer
    65 sold
  • 1.25" Eyepiece lens PLOSSL 10mm HD Fully Coated for telescopes UKPL

    The structure of the optical system: PLOSSL Eyepiece. Coating: optical lenses, fully coated, high-definition. Fully multi-coated glasses for excellent image contrast and light transmission. Foldable goggles for wearing glasses use.
    £4.49
    From China
    £0.99 postage
    or Best Offer
    24 sold
  • Black 1.25" 4mm Fully Coated Plossl Eyepiece Lens GW For Astronomical Telescope

    Type: 4mm Plossl Eyepiece. 1 4mm Plossl Eyepiece. It will bring you impressive scenery. Hope you enjoy your life. Focal Length: 4mm. Lens Material: Optical Glass. If you do not receive our reply within 48 hours, pls.
    £4.29
    From Hong Kong
    £0.99 postage
    or Best Offer
    111 sold
  • TELESCOPE EYEPIECE 12.5mm PLOSSL

    £10.00
    0 bids
    £9.65 postage
    Ending 26 Sep at 11:59AM BST7d 11h
    or Best Offer
    Brand: SebenCustoms services and international tracking provided
  • 1.25" Plugs for Telescope Focusers, Barlow Lenses etc.

    They fill the hole that eyepieces fit into. Note: The Barlow lens in the pictures is for illustration only and not included!
    £6.08
    From United States
    £2.66 postage
    145 sold
  • 2" Plugs for Telescope Focusers, Barlow Lenses etc.

    They fill the hole that an eyepiece goes into it.
    £6.08
    From United States
    £2.66 postage
    71 sold
  • Meade Telescope Moon Filter 1.25 inch - 4000 Series ND96 #7531 (UK Stock) BNIB

    This neutral density filter transmits light uniformly across the entire visual spectrum. This filter may also be employed in the splitting of close double stars where one of the binary pair significantly exceeds the other in brightness.
    £11.90
    Brand: Meade
    £9.67 postage
    Customs services and international tracking provided
    Only 1 left!
  • 1.25" Caps for Telescope Eyepieces (Televue, Meade etc)

    They fit on the barrel end (base) of the eyepiece that you insert into the focuser. They are made of soft yellow plastic so they are quick to put on and take off, and easy to see in the dark. They also fit over the 'eye end' of Celestron/Vixen silver top Plossl eyepieces.
    £6.08
    From United States
    £2.66 postage
    233 sold
  • Caps for Schmidt Cassegrain SCT Telescope Visual Backs

    Try these easy to see alternatives!
    £6.08
    From United States
    £2.66 postage
  • 2" Caps for Telescope Eyepieces (Televue, Meade etc)

    They are made of soft yellow plastic so they are quick to put on and take off, and easy to see in the dark. Try these easy to see alternatives!
    £6.08
    From United States
    £2.66 postage
    Brand: Meade
  • Caps for Telescope Plossl, Nagler 4.8mm, RKE Eyepieces

    They fit on the objective end of the eyepiece that you place your eye to. They are made of soft yellow plastic so they are quick to put on and take off, and easy to see in the dark. Try these easy to see alternatives!
    £6.08
    From United States
    £2.66 postage
    120 sold
  • 0.965" Caps for Telescope Eyepieces

    They fit on the barrel end of the eyepiece that you insert into the focuser. They are made of soft yellow plastic so they are quick to put on and take off.
    £6.08
    From United States
    £2.66 postage
    67 sold
  • Caps for Vixen Lanthanum Superwide, Orion Epic Eyepiece

    They are made of soft yellow plastic so they are quick to put on and take off, and easy to see in the dark. Note: The eyepiece in the pictures is for illustration only and is not included!
    £6.08
    From United States
    £2.66 postage
    Brand: Orion
  • New 1.25'' SWA 58° 2.5mm Planetary Eyepiece for Astronomical Telescope HOT

    1 x SWA 1.25" 2.5MM 58-Degree Planetary Eyepiece. A great value, these eyepieces are exceptional at nearly eliminating lateral color aberration and light scatter often associated with more expensive eyepieces that are better suited for deep space objects.
    £24.99
    From China
    £0.50 postage
    or Best Offer
  • 6mm 1.25" Sterling Plossl Eyepiece. Fully Multicoated Optics 55 Deg FOV

    Manufactured using high grade lens, with 40 layers of fully multi-coated optics and 98% penetration. These sharp looking plossls eyepiece boast a 55 degree field of view, are exceptionally baffled, with edge blackened lens, leaving virtually no ghosting or internal reflections.
    £22.77
    Est. delivery dateEst. delivery Fri, Sep 21
    or Best Offer
    From United States
    FAST & FREE
  • Brand New T2 T Mount to C Mount camera adapter

    It can easily convert T2 mount port or T2 mount microscope trinocular phototube to C-mount type. Picture 2 is the back view of the adapter, which shows the inside T2 mount thread (M42X0.75). Picture 1 is the top view of the adapter, which shows the male C-mount thread;.
    £7.60
    Est. delivery dateEst. delivery Fri, Sep 21
    or Best Offer
    From United States
    FAST & FREE
  • Eyepiece Cap & Plug Bundle inc Televue Nagler, Panoptic, Ethos, Delos, Delite

    This item is a mixed bundle #3 containing the following Try these easy to see alternatives! Use them to protect your valuable eyepieces, barlows, diagonals, focusers, flip mirrors etc.
    £19.01
    From United States
    £3.61 postage
  • 0.965" Plugs for Telescope Focusers, Barlow Lenses etc.

    They fill the hole that the eyepiece fits into.
    £6.08
    From United States
    £2.66 postage
  • Telescope Eyepiece Cap+Plug Bundle (Meade Televue etc)

    Use them to protect your valuable eyepieces, barlows, diagonals, focusers, flip mirrors. This item is a mixed bundle containing the following Try these easy to see alternatives! 5 x 1.25” plugs - For 1.25” barlows, focusers, diagonals etc.
    £15.21
    From United States
    £3.23 postage
    Brand: Meade
  • Brand New T2 T Mount (Male) to C Mount (Female) camera adapter

    It can easily convert C mount port or to T2- T- mount type. Picture 1 is the top view of the adapter, which shows the male T2 T-mount thread(M42X0.75) ;. Picture 2 is the back view of the adapter, which shows the inside C mount thread.
    £7.60
    Est. delivery dateEst. delivery Fri, Sep 21
    FAST & FREE
    From United States
    137 sold
  • Mega Bundle of Eyepiece Caps/Plugs (Televue, Meade etc)

    This item is a mixed bundle #4 containing the following 5 x 1.25” plugs - For 1.25” barlows, focusers, diagonals etc.
    £22.81
    From United States
    £4.14 postage
    Brand: Meade
  • 4mm 1.25" Sterling Plossl Eyepiece. Fully Multicoated Optics 55 Deg FOV

    Manufactured using high grade lens, with 40 layers of fully multi-coated optics and 98% penetration. These sharp looking plossls eyepiece boast a 55 degree field of view, are exceptionally baffled, with edge blackened lens, leaving virtually no ghosting or internal reflections.
    £22.77
    Est. delivery dateEst. delivery Fri, Sep 21
    or Best Offer
    From United States
    FAST & FREE
  • Brand New T2 T Mount to C Mount Camera Telescope Microscope adapter

    It can easily convert T2 mount port or T2 mount microscope trinocular phototube to C-mount type. Picture 2 is the back view of the adapter, which shows the inside T2 mount thread (M42X0.75). Picture 1 is the top view of the adapter, which shows the male C-mount thread;.
    £7.60
    Est. delivery dateEst. delivery Fri, Sep 21
    or Best Offer
    From United States
    FAST & FREE
    92 sold
  • Caps for Photographic T Rings

    They are made of soft yellow plastic so they are quick to put on and take off, and easy to see in the dark. Try these easy to see alternatives!
    £6.08
    From United States
    £2.66 postage
  • Caps for Televue Nagler, Delos, Ethos, Delite, Some Panoptic Eyepieces

    Here's a list Try these easy to see alternatives!
    £6.08
    From United States
    £2.66 postage
    Brand: Meade
  • Caps for Current Televue Plossl 8,11,15,20mm Eyepieces

    They fit on the objective end of the eyepiece that you place your eye to. They are made of soft yellow plastic so they are quick to put on and take off, and easy to see in the dark. Try these easy to see alternatives!
    £6.08
    From United States
    £2.66 postage
  • Caps for Current Televue 32,40,50mm Plossl Eyepieces

    Here's a list Try these easy to see alternatives!
    £6.08
    From United States
    £2.66 postage
  • NEW LW Scientific 2.5x - 3.5x Premium Variable Ultra-Light Flip-Up Loupes

    Experience the finest surgical-quality loupes available at manufacturer-direct prices. Authorized LW Scientific Distributor. You have our word that we will do everything we can for you. - Weight 2.5oz.
    £447.82
    Est. delivery dateEst. delivery Fri, Sep 21
    or Best Offer
    From United States
    FAST & FREE
  • Caps for Televue Nagler T6, Pan 24, Tak. LE Eyepieces

    They fit on the objective end of the eyepiece that you place your eye to. They are made of soft yellow plastic so they are quick to put on and take off, and easy to see in the dark. Try these easy to see alternatives!
    £6.08
    From United States
    £2.66 postage
    68 sold

Telescope Eyepieces with Barlow Lenses

A Barlow lens is a popular tool for magnification in telescopic eyepieces. Economic and effective, telescope eyepieces with Barlow lenses are great for enhancing an image when stargazing.

Named after the astronomer Peter Barlow, these lenses have been around since the eighteenth century and are still a popular tool for enhancing the capabilities of telescopes. A Barlow lens allows you to expand the focal length without needing extra lenses.

How it works

A Barlow lens is a concave shape and can be placed between the lens and the telescope eyepieceto increase the range of magnification. It fits inside the eyepiece for easy use. Just drop it and screw in before connecting the eyepiece. Barlow lenses are a great solution for seeing a bit further.

Magnification

There are many different strengths of Barlow lens available depending on the focal length you would like. It's commonplace to use a 2x lens for double the magnification though there are other strengths of lens available up to 100x. The extra magnification will allow you to gain amazing views of the moon, planets, the stars and beyond.

Selecting a lens

When you choose a Barlow lens for your telescope it's important to get the correct barrel size so that it fits your eyepiece perfectly. The standard size is one and a quarter inches but this may vary so always check. The right size lens should feel like it was made to measure and screw in securely.

Build quality

Some Barlow lenses are coated to improve the quality, whilst some are also encased in a metal housing for protection and stability.

Generally, telescopes with Barlow lensesare of a high quality with clear glass optics for a clear, crisp image. There are some less expensive plastic versions available but they may not give you the best image quality. 

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