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Celestron 2.5x Luminos 2" Barlow Lens

BH #CEL25BL • MFR #93436
 23 reviews
Celestron 2.5x Luminos 2" Barlow Lens
Key Features
  • 2.5x Magnification
  • 2" Barrel Diameter
  • Fully Multicoated Optics
  • Holds 1.25" and 2" Eyepieces
The 2.5x Luminos 2" Barlow Lens from Celestron extends the effective focal length of an optical tube by 2.5x. This telescope accessory features a fully multicoated optical path with four lens elements designed to improve color fidelity and transmit a field of view that is flat from center to edge. The eyepiece holder is threaded to accept 2" eyepiece filters and will accommodate 1.25" and 2" eyepieces; brass compression rings secure the eyepiece without damaging the barrel's finish. The aluminum housing is finished with an anodized hard coat for enhanced scratch and corrosion resistance.
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Celestron 93436 Overview

The 2.5x Luminos 2" Barlow Lens from Celestron extends the effective focal length of an optical tube by 2.5x. This telescope accessory features a fully multicoated optical path with four lens elements designed to improve color fidelity and transmit a field of view that is flat from center to edge. The eyepiece holder is threaded to accept 2" eyepiece filters and will accommodate 1.25" and 2" eyepieces; brass compression rings secure the eyepiece without damaging the barrel's finish. The aluminum housing is finished with an anodized hard coat for enhanced scratch and corrosion resistance.

Compatible with 1.25" and 2" eyepieces
Threaded to accept 2" eyepiece filters
4-element lens system
Brass compression rings with knurled set screw grips
Anodized aluminum housing with rubber handling ring
UPC: 050234934367

Celestron 93436 Specs

Magnification
2.5x
Aperture
28 mm
Barrel Diameter
2"
Filter Size
2"
Dimensions
3.7 x 2.5" (9.3 x 6.4 cm)
Weight
11 oz (312 g)
Packaging Info
Package Weight
0.805 lb
Box Dimensions (LxWxH)
4.7 x 3 x 3"

Celestron 93436 Reviews

Quality Barlow Lens

By Terry
Rated 5 out of 5
Date: 2023-01-18

I purchased this to use with a Celestron Evolution 6 inch telescope. I have used it with a variety of lenses and it works very well. It is very well made (Celestron quality as I would expect.) B&H service impeccable as always!

Cant beat it for the price

By Ralf
Rated 5 out of 5
Date: 2021-09-06

Seems very solidly made. I bought two to stack them together for total 6.25x. Stacking them is pushing things a bit. With the addition of the camera its also a bit unwieldy on the telescope. Using them for imaging Jupiter and Saturn with my Skywatcher Flextube 250P 10 Dobs and ZWO ASI294MC Pro camera. In poor seeing conditions I was able to get the attached picture of Jupiter. After much time processing (still learning) I got the pictures of Jupiter and Saturn you see here.

Great Barlow!

By Gregory
Rated 5 out of 5
Date: 2020-11-04

A well made and at a fair price Barlow!

A lot of lens for a reasonable cost

By Guy
Rated 5 out of 5
Date: 2020-10-14

I tried a 3-element 2x Barlow, which was really heavy. In comparison, the 4-element 2.5x Barlow weighs about half as much but is built like a tank. Fit and finish are perfect. Lens comes with a black pouch plus front and read caps. In use, this lens seemed to be easier to use with my 12 Sky Watcher and Nikon D5300 than the 2x Barlow.

This appears to be awesome!

By Robert
Rated 5 out of 5
Date: 2020-10-12

I ordered this early so when the Celestron NexStar SE8 becomes available, I will have it in hand ready to use. It is solid and weighs almost a pound. When I receive the Celestron NexStar SE8, I will update my review.

Great build high quality ....1 flaw!

By Aaron
Rated 4 out of 5
Date: 2020-06-03

Great build and the quality of the Barlow is excellent ..using it really brings planets , nebula and galaxies closer into view. The only downside it the 1 adjustment screw on the compression ring it has to be cranked down tight or the eyepiece feels loose like it might fall out ...it really needs 2 or 3 adjustment screws

Worked great for my dobsonian

By Kevin
Rated 5 out of 5
Date: 2022-09-08

Works well, clear, just what I needed for my dobsonian. Most articles recommended a 2X, but for me, a 2.5X was better for views of Saturn. A little blurry for rings, but I think thats just my viewing conditions.

Brighten up the view

By Michael
Rated 5 out of 5
Date: 2022-04-10

I luck up and found this unit used for sale for $80 from B&H just the best purchase.

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YOUR RECENTLY VIEWED ITEMS

Do I need a 2" eye piece to go with this?

Do I need a 2" eye piece to go with this?
Asked by: John
The 2.5x Luminos 2x Barlow Lens is compatible with 1.25" and 2" eyepieces.
Answered by: Telescope
Date published: 2021-03-16

Can this be used on a Celestron PowerSeeker ...

Can this be used on a Celestron PowerSeeker 127EQ?
Asked by: Robert
No, the Luminos 2.5x Barlow Lens is 2" and will not fit the PowerSeeker 127EQ telescope.
Answered by: Telescope
Date published: 2020-11-19

Will it work with Celestron Astromaster 130?

Will it work with Celestron Astromaster 130?
Asked by: Mahidhar
NO You need a 1.25" barlow. Celestron X-CEL 2x Barlow Lens -1.25 BH #CE93529 • MFR #93529 https://www.bhphotovideo.com/c/product/818715-REG/Celestron_93529_X_CEL_2x_Barlow_Lens.html
Answered by: John
Date published: 2020-11-02

Which is better, the Televue 2X Barlow or this ...

Which is better, the Televue 2X Barlow or this Luminos 2X? Anyone have experience with both of these?
Asked by: Roger
I have a 2x 1.25 Barlow as well as this, but when I use a 1.25 eyepiece in this with the adapter I cannot tell the difference, they are both near perfect. My light meter says there is a 4% loss of light with both Barlows. You wouldn't notice that at all, maybe a camera would, but not even an eye with an infinite focus lens from cataract surgery. I cannot speak about a 2" Tele Vue Barlow because I haven't used one.
Answered by: Jimmie
Date published: 2023-05-13

question

Will this 2 Barlow work in a 2 Diagonal. I see that some Televue 2 Barlows are not compatible in Diagonals?
Asked by: Chris C.
yes mine fits has been great and came quite fast too
Answered by: gary t.
Date published: 2018-08-28

question

Will it narrow field of view?
Asked by: Brett K.
I haven't noticed any narrowing of field of view using both 2 or 1.5 eyepieces
Answered by: james l.
Date published: 2018-08-28

question

Will this work in a XT8 with 2 eye pieces 32mm and up? (lower) Will the XT8 have enough back focus for this?
Asked by: Bradley
@Marc TThanks Marc for the response and I apologize for thanking you so late.When I asked this the product that was on my mind was the Baader Hyperion Mark-III Zoom. I don't have a clue why I asked this about this Barlow, old and senile, other than I had planned to use this with the Baader. I did order this and the Baader Zoom. My Luminos 2.5x is actual APO and even said so on the box. I was pleasantly surprised with this. Has been cloudy since arrival so no chance to play with yet.Thanks again for your help...
Answered by: Bradley M.
Date published: 2021-07-19
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