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Details on Tele Vue NP101is OTA Imaging System
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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 Tamron 2X AF Teleconverter for Canon EOS
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Details on Omni XLT 150 5.9" / 150mm Newtonian Reflector kit Omni XLT 150 5.9" /150mm Newtonian Reflector Tele
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Details on Minolta AF Tele QD Battery
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Weight: 0.5lb
Whiter and brighter images. Simply put, that is the benefit the Everbrite mirrorcoating. This exotic, dielectric, nonmetallic coating is 99% reflective across the full visual spectrum, resulting in the "whitest," most natural image available. The coating is painstakingly applied to Pyrex with a surface accuracyof a 1/10 wave flatness. The Everbrite is offered in both 1{1/4}" and 2" models. Thediagonal bodies of each are machined from solid blocks of aluminum. In this way we can insure permanent alignment. The ...Details on Tele Vue 90{degrees} Everbrite Diagonal 1.25" with Brass Clamp Ring.
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Focal Length: 420mm - Lens Aperture: 4f-stops
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 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 Tamron 1.4X AF Teleconverter for Canon EOS
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Lithium ion
Quantum Tele Battery. This is a 3 Volt, Lithium BatteryIn Stock
$17.99
$14.57





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".
In Stock
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 Tamron 2X AF Teleconverter for Nikon AF-D
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Details on Orion 1.25" Standard Tele-Extender
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Lithium ion
Sure Shot Tele Max Battery. This is a 3 Volt, Lithium BatteryIn Stock
$17.99
$14.57Focal 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 ...In Stock
Lithium Ion
Canon Prima Tele Date Battery. This is a 3 Volt, Lithium Battery . Dimensions: 0.88 x 0.88 x 0.12.Details on Canon Prima Tele Date Battery
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Lithium Ion
Sure Shot 80 Tele Battery. This is a 3 Volt, Lithium BatteryIn Stock
$17.99
$14.57Focal 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 ...In Stock
Weight: 0.3lb
Adapter to use Televue Short Tube 2" Diagonal #DPS-2004 on Schmidt-Cassegrain Telescopes For the Standard Size 2" Diagonals #DSC-2001 and DPC-2001 use the #ACC-003 Long Schmidt Cassegraing AdapterDetails on Tele Vue Adapter for Schmidt-Cassegrain Telescopes.
In Stock
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 Canon EOS
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Lithium Ion
Sure Shot Tele Max Date Battery. This is a 3 Volt, Lithium BatteryIn Stock
$17.99
$14.57Focal 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 Minolta/Sony
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Lithium Ion
Canon Sure Shot Tele Max Battery. This is a 3 Volt, Lithium BatteryIn Stock
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