What is a Barlow Lens?

Learn more about your Barlow Lens, it's history, and how it enhances your celestial viewing experience.

[@fcdnorton]

Good info,I would have never thought of putting one between the scope and 45 angle eyepiece holder. Cool going to try it.

[@KandiKlover]

I never knew it gave more magnification. I had one that came with my refractor telescope but it was like 6 or 8 inches long so I always just put between the scope and prism because I just assumed that how it was supposed to be.

[@alexmontgomery255]

I’m just now getting back into amateur astronomy after a 35 year hiatus. I’m having to relearn things that I used to take for granted. Thanks for the tips.

[@trainroomgary]

Like - Yes i use a Barlow on my Celestron / Omi • XLT 120. My favorite target The Moon. Along with the moons of Saturn & Jupiter, Gary from Michigan with dark skies.• Cheers from The Detroit & Mackinac Railway 🚂

[@jasonnikolic]

People are worried about Barlow lenses reducing photo quality... just take a picture with a slightly longer exposure. Voila! Better images than you could ever get without a Barlow.

[@EVREY767]

Thanks for videos from Russia!

[@allancopland1768]

Good presentation. A decent quality Barlow is a great thing to own.

[@UKMacMan]

Barlow's are cool, but the explanation here is wrong. Barlow Lens magnify the focal length of the telescope, not the magnification of the eyepiece. So if you Focal length is 400mm with x2 Barlow, then the focal length is now effectively 800mm. Saying that it increases the magnification of the eyepiece is lazy.

[@keithskipsey5420]

I have just bought a 12" Dob that came with a 10mm and 25mm eyepeices, well great. this video showed me what I've been seeing over and over on you tube, Barlows changes the eyepeices Mag. As you say it's not quite right. the Barlow changes the focal length Regardless of the eyepeice I use and it is what I have came to understand. how this video and others explained it demonstrated what the Effect is on eyepeices. this is what sells the reason why I as a newbie might need one. But as yoda once said to me, much to learn you have! Clear skys..

[@mad_clown475]

higher focal legth have higher magnification, they say that barlow lens increases magnification to let people understand what is the use for it

[@reflactor]

This was extremely helpful. Thanks!

[@clashroyaledecks6323]

I have a 3x Barlow lens but I don't know how to use it

[@KandiKlover]

Go to beach. Look at boobies and butts.

[@hop6649]

@@KandiKlover bobs and vagana

[@rodneyjohnson4794]

super! love the extra between the diagonal and scope mag!

[@juanbagu4574]

Hello and thanks for the video. I'm from Argentina and try to put on the Barlow lens between the telescope and de 45 mirror for try to get the 3x magnification than the video and with a eyepiece of 25 mm i can't see anything. I try to get focus in everyway as possible but nothing happen. When I take off the eyepiece I can see the planets or even the star but as soon I put on again the eyepiece I'm loosing again the image. I thank any help you can provide me. I'm owner of a Celestron Nexstar 102slt refractor telescope and I'm say sorry if my English is not very fluent I hope you understand me. Thanks a lot and clear skyes.

[@gonzchi]

hmmm.... why 2x if it's between the eyepiece and the diagonal , and 3 x if it's between the telescope and the diagonal? newbie here...I don't get this. Thank you

[@CelestronDotCom]

Its a trick of the lens....Its like projecting an image of the Moon through an eyepiece. The farther you are behind the eyepiece, the larger the image of the Moon appears. Barlows are similar. The farther you are behind them, the larger the image appears, so you get the extra power when you increase the distance between the barlow lens and the eyepiece. In this case, you are putting the diagonal between the barlow lens and the eyepiece so the light has a longer distance to travel while spreading outward and increasing the apparent magnification. The downside of this is that the image is larger, but it is also fainter as the light spreads out.

[@ly8370]

@@CelestronDotCom If I placed a 3x barlow between the telescope and diagonal, would I get a 4x?

[@aguyfromneptune1616]

@@ly8370 same I am also confused. But I think so yes

[@str4eth]

Hi. I own a Celestron 100az Inpire Refractor telescope. It really brings tears to my eyes when, with the help of the skyportal app, I could see for my very eyes the astronomical bodies that I once thought I would only see in textbooks. So I opted to buy the Celestron accessory kit that comes with a 2x Barlow. However, upon equipping it between the diagonal and the scope itself (3x), I couldn't seem to get it to focus on an object (it reaches the limit before it focuses). I was focusing on Sirius for that one bit. Any tips on how I can make it to focus better?

[@CelestronDotCom]

Please reach out to our technical support team so they can assist you with your Inspire. [e-mail] or 800-421-9649.

[@Voyager-mc8lg]

Why is a 4mm not great when I use a Celesteron 114az Newtonian telescope

[@aguyfromneptune1616]

Because 4mm gives u extremely high magnification and Celeste on power seeker 114eq is not enough capable to magnify more than 275-280x

Hi. I have a celestron 130 az. How i will connect my DSLR camera to the telescope? I want to get video and photo image what i see with my eyes. Phone is not enough. Can you tell me complete equpment models??

[@xXxSynthxXx]

You need a T Mount adapter.

thanks

[@agent7426]

Can these work with celestron ultima 100?

[@dinosworkshop6870]

Very informative!

[@arcvidelos8008]

Does a Barlow lens cause vignetting on eyepieces with a wide apparent field?

[@noreaction1]

Which Magnification beside 0.7x and 2x do you sell compatible with the edgehd series?

[@luannsutton3540]

Thank you!

[@SixStringsCovers]

I would like to buy a Bresser Taurus telescope and it says a maximum zooming of 675x. Do you think I will get that zoom with a 3x Barlow lens? What is the best telescope to buy Celestron, Bresser or Sky Watcher?

[@spykepink]

Can this work with celestron ultima 100? What would be a good lens for celestron ultima 100 to double the zoom?

[@spookymiraclepreacher6037]

Good tips here.

[@gmalekhine1395]

Yeah Celestron barlows are amongst the best Barlow lens! a Barlow can double your eyepiece collection, or not?

[@defyphysics2955]

Very informative, tq

[@DonAlpha]

I recently bought a Celestron travelscope 80 and i have just realised that the Barlow is what I need to get better views

[@user-pf5qj4jn4d]

What if you have 2 Barlow lens, 2x and 3x, and have both stacked together with a 20mm eyepiece? Would that work?

[@realflow100]

the image quality degrades significantly when you stack barlow lenses! Do not!

[@aguyfromneptune1616]

In that case, you will cry that your telescope has become a 1980s camera😂

[@bluename4]

what would the effect be, if combining a Focal Reducer and a Barlow Lense together?

[@nategraham4027]

Their effects would "fight" with one another. For example, a 2x barlow lens plus a 0.5x focal reducer would in principle cancel out completely, giving you the native focal length.

[@premanand7803]

please make a video on how telescope eyepieces are made

[@sahayapuvan7988]

Thank you

[@Nottsboy24]

Nice info 👍:)

[@Belfastboi]

Do you put them together? The lens and the eyepiece?

[@NoobGamer-iw6vl]

yes u can thread hem together. :)

[@birds_adorb]

This is good info.

[@stevengreen11]

Can a Barlow be used to increase magnification for your camera during astrophotography?

[@randomperson-ok9dt]

Yes

[@justincace5517]

The Barlow extends the secondary mirror's focal point. It's like adding a 2X fixed zoom in front of your sensor. Your FOV is slightly lost as well; as you likely guessed.

[@Jay-he2mo]

Hi. I have a question. Is this Barlow lens compatible with the celestron firstscope? Plz tell me. Thanks.

[@CelestronDotCom]

You should be able to use any 1.25” barlow with this scope.

[@Jay-he2mo]

Thanx

[@andonrangelov8844]

Can someone comment on the following: I got reflector telescope with short focal length of 300mm (mirror diameter is 76mm). The prime mirror is spherical if I use x2 Barlow is it going to reduce the spherical aberrations? I mean if it enlarge the focal length then may be it also reduce the spherical aberrations. My spherical mirror effective focal length will be 600mm instead of 300mm and thus less spherical aberrations?

[@jasonnikolic]

Yes, you are correct.

[@DaveWatts_ejectamenta]

You''ll get less light though, a 1/4 of the light for a 2X.

[@ibrahimahmed-fy6iv]

Can they work on any Celestron Telescope

[@aloe6303]

Yes

[@aloe6303]

Does this work with a travelscope 70

[@CelestronDotCom]

Your Travel Scope 70 can handle 1.25" eyepiece, filter, and Barlow lenses.

[@ionescunumefals3164]

When i put mine, i just cannot see anything with it. At all

[@CelestronDotCom]

Please reach out to our technical support team so they can assist you with your equipment: www.celestron.com/pages/technical-support

[@fernando-sl7qm]

Awesome

[@juanbagu4574]

I'm forget to tell you that I have a Celestron astromaster kit with a Barlow lens 2x, and eyepieces with 25, 15, 9 and 6 mm.

[@ashtonwhite3485]

i personally will use 20mm with X3 balow and i get good veiws

[@benR8]

Leo

[@patricksanders5941]

15 people do not know how to properly focus there Nikon cameras...

[@repsacca]

That annoying background noise is enough to make me skip this video

[@spykepink]

Can this work with celestron ultima 100? What would be a good lens for celestron ultima 100 to double the zoom?

[@CelestronDotCom]

This is a list of our eyepieces and spotting scopes that go well together.