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Your cart is empty.4.1 out of 5 stars
- #54 in Telescope Barlow Lenses
Product Description
SVBONY Barlow Lense 2X is a great Halloween birthday christmas gift
SVBONY 1.25" 31.7mm 2x Barlow lens multi coated metal with M42x0.75 thread camera connect Interface for telescope eyepieces
It gives a big magnification boost to any standard 1.25" eyepiece;double the capacity of existing set eyepiece at the cost of a single eyepiece
The housing is precision machined from aluminum stock and black anodized to a hard finish
The lens edges and inner barrel are blackened to provide maximum contrast
2x magnification factor with 1.25" interface Doubles the magnification of any standard 1.25'' eyepiece
Fully multi coated optical glass lens Chromatic corrected;high transmittance achieves clear and sharp views
3 element APO;2 groups lens Without achromatic treatment;the naked eye can see two groups of lenses
Free dust cover Keeps lens clear easily with 2 pairs of dust cover
Interface with M42x0.75 thread M42x0.75mm male thread for T/T2 connectors
Quality aluminum stock and black anodized body Precision machined;sturdy for long term use
Main points
Barrel size: 1.25"
- Magnification factor: 2x
- Lens material:pure optical glass lens
- Lens coating: multi coated
- Sleeve material: full metal
- Thread interface: M42x0.75
A very good quality Barlow with clear images and enhancement of regular eyepieces
Definitely Improved Viewing
This worked perfectly for my existing Canon compatible T-adapter, allowing me to use my camera and telescope for astrophotography
I got this to connect to my dslr for planetary videos in my f5 Newtonian
Needed this lens to fit a dslr camera to a telescope. It is well constructed out of machined aluminum and the lens is fully multi-coated. The fit is good
Package Includes:
1X SVBONY 2X Barlow Lens
2X Dust Cove
Common sense of Barlow lens
The Barlow lens’ role is not just to improve the image quality;it's also play an important role of viewing comfortable
Even a well made Barlow will little damage on the imaging quality
When the Barlow lens and eyepiece using together;if the magnification is higher than the maximum effective magnification of the telescope itself
the Barlow lens observation effect appears nearly zero or imaging becomes blurred
Well Made Barlow Lens
The mechanical housing is well made, all anodized aluminum and easily disassembled. The lens is in a cell removable from the bottom (entrance end) of the assembly.
If you remove the lens cell, then you have a simple 1.25 inch to T-mount mechanical adapter for direct projection.
The top (exit end) receives 1.25 inch eyepieces, so you could insert an eyepiece to do eyepiece projection.
This all works well, because you're not using the optics that come with the unit
Resident Skeptic
Reviewed in the United States on October 13, 2024
Bought it so I could connect my DSLR to a Dobsonian telescope, which is a beast to lug in the first place. Putting the DSLR into the Dob makes it unbalanced and have to support the tilt mechanism so it stays in place. But this wonderful SVBony piece of ingenuity does nothing for me - the DSLR cannot focus, picture comes blurry and nowhere as detailed as the telescope would show to my eyes with a Ploessl dropped in the viewer.What does it do? Why aren't there any instructions, SVBony?Until you know how to use this contraption, I suggest you save your money..
jlax
Reviewed in the United States on January 13, 2023
All metal, very high quality and reasonably priced!
Santiago Lazo
Reviewed in Mexico on August 8, 2021
Yo compré este producto pensando en que me serviría, tristemente el barlow x2 no es para mi tipo de telescopio, estoy seguro de que para otro tipo de telescopio servirá perfectamente. Les recomiendo primero investigar si este tipo de barlow les ayudará a poder observar el espacio con sus telescopios.
Wihan Herbst
Reviewed in Australia on June 23, 2020
I purchased this as i couldn't get my DSLR to focus. This did resolve that issue and i could get it to focus, however the image quality was very poor.
George
Reviewed in the United States on December 22, 2020
As an amateur, I am pleased with this Barlow lens. I have had a Celestron Omni AZ 102 telescope for a week now. The Barlow came just in time for me to use for the conjunction of Jupiter and Venus. I can see the rings of Venus and the moons of Jupiter with the 10mm eyepiece that came with the telescope, but this Barlow lens makes them much clearer. I have found that I do need to refocus my telescope when switching out the plain eyepiece. I noticed some reviewers mentioning that they did not need to refocus.
Strodav
Reviewed in the United States on January 29, 2019
Needed this lens to fit a dslr camera to a telescope. It is well constructed out of machined aluminum and the lens is fully multi-coated. The fit is good and I am getting some great shots off my telescope.
K fam
Reviewed in the United States on November 24, 2018
The mechanical housing is well made, all anodized aluminum and easily disassembled. The lens is in a cell removable from the bottom (entrance end) of the assembly. If you remove the lens cell, then you have a simple 1.25 inch to T-mount mechanical adapter for direct projection. The top (exit end) receives 1.25 inch eyepieces, so you could insert an eyepiece to do eyepiece projection. This all works well, because you're not using the optics that come with the unit.What is disappointing is the negative lens included in the assembly. It's a 20mm diameter, -125mm focal length piece of plain, plano-concave, uncoated glass. Not a cemented achromat or even coated. So the sales specifications ("fully multi coated", "chromatic corrected") are risible, typical of those overseas friends who tell us what we want to hear without any correlation to what the words mean.The -125mm element is located 22mm inside of the telescope focuser's 1.25 inch eyepiece shoulder. The eyepiece receptacle is 38mm past the focuser's shoulder. Use the Barlow formulas to calculate what the effective magnification ratio is on your instrument. The magnification will be M = f/(f+d), where f = -125mm is the focal length of the lens, and d is the distance of the lens inside the focal plane of the lens. To achieve M = 2x as specified for this product, d would have to be -1/2 of f, or 62.5mm inside the focal plane. I don't see how that is possible with this tube that is shorter, so the actual magnification is going to be much less than 2x.
Suthrnbuilder
Reviewed in the United States on September 12, 2017
I am really satisfied with this adapter. It is all metal and has the appearance of high quality. The threads mated perfectly with the T_ring I already had for my telescope, simply unthread the short tube that is on your t ring and thread this back in its place. No problem at all. I can also be used independently of a T-ring. My 1.25 lenses fit perfectly inside the tube.
Peter
Reviewed in the United States on September 10, 2017
I can't use this on my telescope because of the focus length. I dropped a star because the machining of the tightening screw was a little jagged and i had to file it down a bit so I could set an eyepiece into it. I plan on buying a new telescope and hopefully I will be able to use this with it. The 3x I got with my Travelscope is plastic and cheap feeling. This piece feels quality made, aside from my earlier complaint.
Eudice
Reviewed in the United States on October 27, 2015
When I got it, it came with no instructions. I tried all different ways to attach it and could not do it so I was going to return it.The treads, didn't tread into anything. I decided to look at the mfg. of the telescope site and see if they showed how to use theiroriginal piece which was more than double the price of this. It did. I had to remove the eye piece that was there, drop this one in it's place, put the original one into this, and that was it. I don't know why the threads are in it. Anyway, it did a great job of doubling what I was seeing without it. A nice piece with good optical glass.Don't know why they don't put instructions in.
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