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Tele 4

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  1. 24% offtelevue eyepiece fits 25
    Tele Vue 12mm Nagler IV Eyepiece, fits 2" & 1.25".

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    Weight: 1.5lb

    When Tele Vue designed the Radian series of eyepieces, Tele Vue used the Nagler concept as the basis. However with the Radians, Tele Vue decided to balance size, weight, and cost relative to a consistent 20mm eyerelief. During the design process Tele Vue found that we could not only balance these factors for 1.25" focussers, but improved glass types lead to better imaging, contrast enhancement, reduced pincushion, ghost suppression, and a newer concept in a click-stop adjustable eyeguard as well.Applying that ...

    Details on Tele Vue 12mm Nagler IV Eyepiece, fits 2" & 1.25".

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  2. kenko af teleplus teleconverter
    Kenko 1.5x DG AF Teleplus Teleconverter for Minolta/Sony

    Focal Length: 450mm - Lens Aperture: 4f-stops

    The 1.5x teleconverter (also known as a tele-extender) will multiply the focal length of the existing lens by 1.5x, and will cut back the amount of light by one f/stop. For example, using a 1.5x teleconverter with a 300mm lens will effectively increase the focal length to 450mm. A lens set to f/2.8 will now be f/4. This DG teleconverter has upgraded Gate-Array IC circuitry to work better with digital SLR's and some of the digital SLR lenses*. This means that the converter's unique circuitry maintains signal ...

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  3. tamron af teleconverter
    Tamron 2X AF Teleconverter for Canon EOS

    Optical Zoom: 2X - Focal Length: 300mm

    The 2x teleconverter (also known as a tele-extender) will multiply the focal length of the existing lens by 2x, and will cut back the amount of light by 2 f/stops. For example, using a 2x teleconverter with a 300 mm lens will effectively increase the focal length to 600 mm. A lens set to f/2.8 will now be f/5.6. Teleconverters are not recommended for lenses wider than 50mm, e.g. 28-105mm. However, full AF operation is only possible with lenses with open aperture of f/2.8 or brighter. Please be aware that AF ...

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  4. meade barlow 25 mount
    5x ULTRA TELE EXTENDER (1.25")

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    Weight: 1.5lb

    Increase your eyepiece's magnification power by up to five times with this indispensable four-element attachment. 5x power multiplier1.25' barrel sizeFour-element optical designFlat field-of-viewPremium grade optical glassIndividually tuned multi-layered coatings for maximum light transmission and highest contrastLens edges and all internal metal surfaces are blackened to maximize image contrastMaintain the comfortable eye relief of longer focal length eyepieces while increasing the magnificationThis ...

    Details on 5x ULTRA TELE EXTENDER (1.25")

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  5. celestron omni xlt 150
    Omni XLT 150 5.9" / 150mm Newtonian Reflector kit Omni XLT 150 5.9" /150mm ...

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    Omni XLT series features the stable platform of the CG-4 mount and high quality optics. Using aspheric shaping technology in conjunction with hand-figuring the optics the Omni XLT presents an image with virtually no spherical aberration. We also added our famous StarBright XLT coating system to further enhance light transmission.

    Details on Omni XLT 150 5.9" / 150mm Newtonian Reflector kit Omni XLT 150 5.9" /150mm Newtonian Reflector Tele

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  6. kenko af teleplus teleconverter
    Kenko 1.5x DG AF Teleplus Teleconverter for Canon EOS

    Focal Length: 450mm - Lens Aperture: 4f-stops

    The 1.5x teleconverter (also known as a tele-extender) will multiply the focal length of the existing lens by 1.5x, and will cut back the amount of light by one f/stop. For example, using a 1.5x teleconverter with a 300mm lens will effectively increase the focal length to 450mm. A lens set to f/2.8 will now be f/4. This DG teleconverter has upgraded Gate-Array IC circuitry to work better with digital SLR's and some of the digital SLR lenses*. This means that the converter's unique circuitry maintains signal ...

    Details on Kenko 1.5x DG AF Teleplus Teleconverter for Canon EOS

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  7. tamron sp pro teleconverter
    Tamron SP 2X Pro Teleconverter for Canon EOS

    Optical Zoom: 2X - Focal Length: 90mm

    The Tamron SP AF Pro teleconverter features improved optical construction, and is designed to be used with lenses that are f/2.8 and of focal lengths of 90mm or greater. The 2x teleconverter (also known as a tele-extender) will multiply the focal length of the existing lens by 2x, and will cut back the amount of light by 2 f/stops. For example, using a 2x teleconverter with a 300 mm lens will effectively increase the focal length to 600 mm. A lens set to f/2.8 will now be f/5.6. Teleconverters are not ...

    Details on Tamron SP 2X Pro Teleconverter for Canon EOS

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  8. televue barlow lens 25
    Tele Vue New 5x Powermate Barlow lens 1.25" - T Ring Adaptable.

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    Tele Vue Barlows: "An Optically Perfect Window " Properly designed Barlows do wonderful things. First, they amplify power while retaining the eyepiece's eye-relief. Second, they slow the telescope's f/#, which improves eyepiece sharpness. Third, the designer can introduce compensations for eyepiece aberrations. The 2.5X Powermate Barlow is a 4-element parfocal, compact amplifying lens system. POWERMATE consists of a negative achromatic doublet plus a positive "pupil-correcting" doublet. While it looks and ...

    Details on Tele Vue New 5x Powermate Barlow lens 1.25" - T Ring Adaptable.

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  9. tamron sp pro teleconverter
    Tamron SP 1.4X Pro Teleconverter for Canon EOS

    Focal Length: 420mm - Lens Aperture: 4f-stops

    The Tamron SP AF Pro teleconverter features improved optical construction, and is designed to be used with lenses that are f/2.8 and of focal lengths of 90mm or greater.The 1.4x teleconverter (also known as a tele-extender) will multiply the focal length of the existing lens by 1.4x, and will cut back the amount of light by one f/stop. For example, using a 1.4x teleconverter with a 300mm lens will effectively increase the focal length to 420mm. A lens set to f/2.8 will now be f/4.Teleconverters are not ...

    Details on Tamron SP 1.4X Pro Teleconverter for Canon EOS

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  10. 28% offkenko mc4
    Kenko 2X Teleplus MC4 DG Teleconverter for Minolta/Sony AF

    Optical Zoom: 2X - Focal Length: 300mm

    The 2X teleconverter (also known as a tele-extender) will multiply the focal length of the existing lens by 2X, and will cut back the amount of light by 2 f/stops. For example, using a 2X teleconverter with a 300 mm lens will effectively increase the focal length to 600 mm. A lens set to f/2.8 will now be f/5.6. Teleconverters are not recommended for lenses wider than 50mm, e.g. 28-105mm. However, full AF operation is only possible with lenses with open aperture of f/2.8 or brighter. Please be aware that AF ...

    Details on Kenko 2X Teleplus MC4 DG Teleconverter for Minolta/Sony AF

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  11. pentax f4-5
    SIGMA 70-300 F4-5.6 APO DG MACRO AF FOR PENTAX

    Lens Aperture: 4f-stops

    Sigma's 70-300mm f4-5.6 APO DG Macro is one of several tele zoom lenses. It is a compact Apochromatic tele zoom lens incorporating two Special Low Dispersion glass elements in the front lens group, plus one Special Low Dispersion glass element in the rear lens group, to minimize chromatic aberration.

    Details on SIGMA 70-300 F4-5.6 APO DG MACRO AF FOR PENTAX

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  12. kenko 300 dg teleconverter
    Kenko 2X Teleplus PRO 300 DG Teleconverter for Minolta/Sony AF

    Optical Zoom: 2X - Focal Length: 300mm

    The 2X teleconverter (also known as a tele-extender) will multiply the focal length of the existing lens by 2X, and will cut back the amount of light by 2 f/stops. For example, using a 2X teleconverter with a 300 mm lens will effectively increase the focal length to 600 mm. A lens set to f/2.8 will now be f/5.6. Teleconverters are not recommended for lenses wider than 50mm, e.g. 28-105mm. However, full AF operation is only possible with lenses with open aperture of f/2.8 or brighter. Please be aware that AF ...

    Details on Kenko 2X Teleplus PRO 300 DG Teleconverter for Minolta/Sony AF

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  13. kenko mc-7
    Kenko 2X Teleplus MC7 DG Teleconverter for Nikon AF-D

    Optical Zoom: 2X - Focal Length: 300mm

    The 2X teleconverter (also known as a tele-extender) will multiply the focal length of the existing lens by 2X, and will cut back the amount of light by 2 f/stops. For example, using a 2X teleconverter with a 300 mm lens will effectively increase the focal length to 600 mm. A lens set to f/2.8 will now be f/5.6. This DG teleconverter has upgraded Gate-Array IC circuitry to work better with digital SLR's and some of the digital SLR lenses. This means that the converter's unique circuitry maintains signal ...

    Details on Kenko 2X Teleplus MC7 DG Teleconverter for Nikon AF-D

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  14. 24% offsony end conversion lens

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  15. pentax dg apo teleconverter
    Sigma 1.4X EX DG APO Teleconverter for Pentax AF

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    Focal Length: 420mm - Lens Aperture: 4f-stops

    This Tele Converter will multiply the focal lenght of the existing lens by 1.4x, and will cut back the amount of light by one f/stop. For example, using a 1.4x teleconverter with a 300 mm lens will effectively increase the focal length to 420mm. A lens set to f/2.8 will now be f/4. Note: Due to the high optical quality of this teleconverter, this item will only fit and work with a select list of lenses. Please click here for a compatibility chart of all compatible lenses. Note: The DG denotes added coating ...

    Details on Sigma 1.4X EX DG APO Teleconverter for Pentax AF

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  16. kenko af teleplus teleconverter
    Kenko 1.5x DG AF Teleplus Teleconverter for Pentax

    Focal Length: 450mm - Lens Aperture: 4f-stops

    The 1.5x teleconverter (also known as a tele-extender) will multiply the focal length of the existing lens by 1.5x, and will cut back the amount of light by one f/stop. For example, using a 1.5x teleconverter with a 300mm lens will effectively increase the focal length to 450mm. A lens set to f/2.8 will now be f/4. This DG teleconverter has upgraded Gate-Array IC circuitry to work better with digital SLR's and some of the digital SLR lenses*. This means that the converter's unique circuitry maintains signal ...

    Details on Kenko 1.5x DG AF Teleplus Teleconverter for Pentax

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  17. qms ex apo teleconverter
    Sigma 1.4X EX APO Teleconverter for Minolta/Sony AF

    Focal Length: 420mm - Lens Aperture: 4f-stops

    This Tele Converter will multiply the focal lenght of the existing lens by 1.4x, and will cut back the amount of light by one f/stop. For example, using a 1.4x teleconverter with a 300 mm lens will effectively increase the focal length to 420mm. A lens set to f/2.8 will now be f/4. Note: Due to the high optical quality of this teleconverter, this item will only fit and work with a select list of lenses. Please click here for a compatibility chart of all compatible lenses.&ref=Become

    Details on Sigma 1.4X EX APO Teleconverter for Minolta/Sony AF

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  18. dg apo teleconverter
    Sigma 1.4X EX DG APO Teleconverter for Sigma AF

    Focal Length: 420mm - Lens Aperture: 4f-stops

    This Tele Converter will multiply the focal lenght of the existing lens by 1.4x, and will cut back the amount of light by one f/stop. For example, using a 1.4x teleconverter with a 300 mm lens will effectively increase the focal length to 420mm. A lens set to f/2.8 will now be f/4. Note: Due to the high optical quality of this teleconverter, this item will only fit and work with a select list of lenses. Please click here for a compatibility chart of all compatible lenses. Note: The DG denotes added coating ...

    Details on Sigma 1.4X EX DG APO Teleconverter for Sigma AF

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  19. kenko af teleplus teleconverter
    Kenko 1.5x DG AF Teleplus Teleconverter for Nikon AF-D

    Focal Length: 450mm - Lens Aperture: 4f-stops

    The 1.5x teleconverter (also known as a tele-extender) will multiply the focal length of the existing lens by 1.5x, and will cut back the amount of light by one f/stop. For example, using a 1.5x teleconverter with a 300mm lens will effectively increase the focal length to 450mm. A lens set to f/2.8 will now be f/4. This DG teleconverter has upgraded inchGate-Array ICinch circuitry to work better with digital SLR's and some of the digital SLR lenses*. This means that the converter's unique circuitry maintains ...

    Details on Kenko 1.5x DG AF Teleplus Teleconverter for Nikon AF-D

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  20. kenko mc4
    Kenko 2X Teleplus MC4 DG Teleconverter for Pentax AF

    Optical Zoom: 2X - Focal Length: 300mm

    The 2X tele-converter (also known as a tele-extender) will multiply the focal length of the existing lens by 2X, and will cut back the amount of light by 2 f/stops. For example, using a 2X tele-converter with a 300 mm lens will effectively increase the focal length to 600 mm. A lens set to f/2.8 will now be f/5.6. Tele-converters are not recommended for lenses wider than 50mm, e.g. 28-105mm. However, full AF operation is only possible with lenses with open aperture of f/2.8 or brighter. Please be aware that AF ...

    Details on Kenko 2X Teleplus MC4 DG Teleconverter for Pentax AF

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