The Barlow TV 3X is generally considered somewhat superior to the 2X, and is considered unusually excellent. With short, inexpensive extension tubes up to 1.5 in length placed between the Barlow and the eyepiece, the EiC16 can produce 1.9X magnification, so it’s a good choice sometimes.
I *think* the 17.5mm Baader Morpheus *should* work well with a good Barlow like the TV 2X or the EiC16.The TV 3X Barlow is generally considered somewhat superior to the 2X, and is considered unusually excellent. I think the 17.5mm Baader Morpheus should work well with a good Barlow like the TV 2X or EiC16. That said, generally conventional Barlows work very well with most eyepieces below 20mm focal length.
The high index multi-coated glass ensures optimum aberration correction is exceptional. All in all, this Barlow performs very well; if only it had a camera thread and a rubber grip, it would have it all. That said, if you need a 1.25″ Barlow 2X, the TV is very good.
Are Barlow lenses any good?
Some premium “apochromatic” Barlows use a third ED (extra-low dispersion) glass element to further reduce chromatic aberration. Without getting into an in-depth optical evaluation, the 2-element Barlow lens is pretty much the industry standard. Its changing focal length makes it difficult to correct aberrations, so zoom lenses have a combination of at least 4 glass elements. Your eye will not be able to distinguish the object against the background, as most of the background is the object itself.
Early Barlow lenses, which were simple single element concave lenses, were notorious for degrading image quality. Magnification is limited not only by atmospheric conditions, where you can’t go beyond a certain point (usually 200x), but also by the telescope.
What does a 2x Barlow lens do?
And when using a Barlow with an astronomical camera or DSLR, the magnification factor can be very different due to the position of the camera’s sensor. However, if your telescope is not compatible with a long barlow lens, you have no choice but to use a “short short type”. If you attach a 2x barlow lens to that eyepiece, you will double the effective magnification of that eyepiece to 100x. The most common configurations use three or more elements for achromatic or apochromatic correction and higher image quality.
For astrophotography, especially for lunar, solar and planetary images, a focal extender or Barlow increases the image size, which helps increase the number of illuminated pixels on the camera’s sensor. Because they eliminate vignetting, telecentric Barlows are ideal for use with longer focal length eyepieces with large apparent fields of view.
Is a 2x or 3x Barlow lens better?
For mid-range powers, just remove the 8mm and look through that alone, at 56x, and then on a 2x barlow for 113x; the same with a 12mm. Teleconverters usually have more glass than Barlow, but their field of view is usually better corrected and also the focus doesn’t change. One of the biggest advantages of, for example, a 2x bar low lens is that it doubles the magnification of your eyepieces, which can also be considered effectively doubling your eyepiece collection. There are many much cheaper eyepieces with the same quality but with a narrower view, but I definitely suggest having fewer wide angle eyepieces.
If you are going to pursue astronomy, you will probably replace this telescope with one that has much higher magnification, so plan the eyepieces you are going to buy with that in mind and use barlows to compensate for the lack of power.