Showing 11 to 20 of 25 total
Set Descending Direction
  2. 1
  3. 2
  4. 3
  1. Explore Scientific 2" 3x Focal Extender (Barlow) Explore Scientific 2

    Explore Scientific 2" 3x Focal Extender (Barlow)

    $299.99

    Increase your eyepiece magnification by 3x

    2" barrel diameter

    Keeps eyerelief consistent

  2. 2X Powermate image amplifier for 2" eyepieces, with 1.25" eyepiece adapter Tele Vue 2X Powermate image amplifier for 2

    Tele Vue 2X Powermate image amplifier for 2" eyepieces, with 1.25" eyepiece adapter

    $342.01
    12 Review(s)
    If you need a very high quality 2x Barlow for 2" eyepieces, look no further than this TeleVue Powermate. While not technically a Barlow, this unique new 4-lens image amplifier performs the same functions, but at a higher level of optical correction. Barlow lenses have a negative power that diverges field rays, lengthening the effective focal length of the telescope and increasing the magnification . . .
  3. 2X Big Barlow for 2" eyepieces, with 1.25" eyepiece adapter Tele Vue 2X Big Barlow for 2

    Tele Vue 2X Big Barlow for 2" eyepieces, with 1.25" eyepiece adapter

    $228.01
    This 2" 2x Clamp Ring Big Barlow can be used with any telescope using a 2" focuser. As it is only 4.5" long, it can also be used in most 2" star diagonals for 2x magnification.

    It can also be placed into a 2" focuser in front of a 2" star diagonal to give higher magnification than the nominal 2x. Some refractors might not have enough focuser travel to allow this directly, however. . . .

  4. 4X Powermate image amplifier for 2" eyepieces, with 1.25" eyepiece adapter Tele Vue 4X Powermate image amplifier for 2

    Tele Vue 4X Powermate image amplifier for 2" eyepieces, with 1.25" eyepiece adapter

    $349.01
    6 Review(s)
    If you need a very high quality, very high power 4x Barlow for 2" eyepieces, look no further than this TeleVue Powermate. While not technically a Barlow, this unique new 4-lens image amplifier performs the same functions, but at a higher level of optical correction.

    Barlow lenses have a negative power that diverges field rays, lengthening the effective focal length of the telescope and increasi . . .

  5. T-Ring adapter for 2" 2x Powermate Tele Vue T-Ring adapter for 2

    Tele Vue T-Ring adapter for 2" 2x Powermate

    $60.00
    1 Review(s)
    This threaded photographic adapter ring replaces the 2" eyepiece holder on the 2" 2x TeleVue Powermate Barlow. After unscrewing the black 2" eyepiece holder from the chrome barrel containing the optics of the Powermate, the adapter threads directly onto the chrome barrel in place of the eyepiece holder. The adapter has T-threads on the other end that allow a T-ring to be attached to the adapter so . . .
  6. 2.4X Dakin Barlow for 1.25" eyepieces 2.4X Dakin Barlow for 1.25

    2.4X Dakin Barlow for 1.25" eyepieces

    $210.00
    2 Review(s)
    This Ralph Dakin doublet design is considered by many professional astronomers to be the Rolls-Royce of 1.25" Barlows. It has a magnification of 2.4x for non-repeating eyepiece powers.
  7. 1.25" 1.6X Extender-Q for Takahashi refractors 1.25

    1.25" 1.6X Extender-Q for Takahashi refractors

    $640.00
    This dual purpose Takahashi optical system is both a 2" 1.6x Barlow and a field flattening photographic tele-extender designed for use with Takahashi FSQ-106/Sky 90 refractors . . .
  8. T-Ring adapter for 2" 4x Powermate Tele Vue T-Ring adapter for 2

    Tele Vue T-Ring adapter for 2" 4x Powermate

    $60.00
    This threaded adapter ring replaces the 2" eyepiece holder on the 2" 4x TeleVue Powermate Barlow and can only be used with the newest version of the Powermate (our part #9140C). After unscrewing the black 2" eyepiece holder from the chrome barrel containing the optics of the Powermate, the adapter threads directly onto the chrome barrel in place of the eyepiece holder. The adapter has T-threads th . . .
  9. 2X 1.25" Barlow with compression ring 2X 1.25

    2X 1.25" Barlow with compression ring

    $204.00
    This quality 2x Barlow is designed to mount in front of your star diagonal and uses a non-marring compression ring to hold the diagonal in place, rather than an easily-lost metal thumbscrew . . .
  10. 5X Powermate image amplifier for 1.25" eyepieces Tele Vue 5X Powermate image amplifier for 1.25

    Tele Vue 5X Powermate image amplifier for 1.25" eyepieces

    $228.01
    8 Review(s)
    If you must wear glasses while observing, and you're looking for an ultra high power Barlow to get high magnifications from your favorite long focal length/long eye relief eyepieces, look no further than this 5x Powermate. While not technically a Barlow, this unique new 4-lens image amplifier performs the same functions, but at a higher level of optical correction.

    Barlow lenses have a n . . .

Showing 11 to 20 of 25 total
Set Descending Direction
  2. 1
  3. 2
  4. 3