• The Large Field Corrector optimizes images at the edge of field when imaging through the Tele Vue-NP101, NP101is and NP127is telescopes. Recommended for cameras with diagonal sizes larger than APS format.

• A reducer has the optical property of decreasing the effective focal length of the telescope. Reduced focal length results in wider-field and faster imaging time on nebulae and galaxies. The 0.8x Reducer for NP Scopes reduces focal length to 80% of normal and is optimized for imaging with up to APS-size (27mm diagonal) cameras.

• Flatteners clean-up focus away from the center of an image. The 0.8x Reducer/Flattener for 102 Scopes reduces telescope focal length by 80% while flattening the field for up to 35mm frame formats. Although optimized for TV102 scopes, it also works with any non-flat-field refractors (such as doublets or triplets) from 800-1000mm focal length.

• Imaging System 48mm Filter Adapter allows use of 48mm filters in optical-train and adds 0.25” of spacing. Best if used closest to the chip to minimize any vignetting.

• This is a key component to the imaging system's versatility on non-"is" scopes. By placing the Imaging System Nosepiece for 2" Focuser in your standard 2" drawtube, you open up your telescope to accept the 2.4" Imaging System accessories and take advantage of the solid threaded connection.

• 2.4" Adapter for 2" Accessories is another key component that expands the usability of your existing 2" accessories. The adapter allows any 2” accessory to connect to the Imaging System. This includes cameras and filter wheels with 2" nosepieces. This adapter includes dual thumb-screws and non-marring brass clamp ring.

• Standard T-Ring Adapter for 2.4" provides a standard T-ring thread to attach your camera too. Recommended for cameras with APS-size or smaller chips.

• Canon EOS cameras are popular with astro-imaging enthusiasts. But, the typical T-ring / telescope setup does not take advantage of the wide aperture of the Canon bayonet mount: significant vignetting is caused by the constriction of the T-ring opening. Canon Wide T Adapter with Bayonet for 2.4" connects to your EOS in place of the T-ring and provides 25% greater aperture to minimize vignetting.

• SBIG STL Camera Adapter for 2.4" threads directly onto the STL11000.

• We have adaptors that connect to several Apogeeastro cameras. The Apogee U9000/U16-D7/9 Adapter for 2.4" connects to Alta U9000 or U16 cameras or any Apogee camera with D7 or D9 body housing.

• Apogee U47-D2 Camera Adapter for 2.4" fits the Apogee U47 camera or any Apogee model with D2 body housing.

• 0.040" (1mm) Long Accessory Tube for 2.4" adds 0.040" (1mm) extension between Imaging System accessories.

• 0.080" (2mm) Long Accessory Tube for 2.4" adds 0.080" (2mm) extension between Imaging System accessories.

• 0.25" Length Accessory Tube for 2.4" adds 0.250" (6.4mm) extension between Imaging System accessories.

• 0.375" Length Accessory Tube for 2.4" adds 0.375" (9.5mm) extension between Imaging System accessories.

• 0.50" Length Accessory Tube for 2.4" adds 0.500" (12.7mm) extension between Imaging System accessories.

• 1.0" Length Accessory Tube for 2.4" adds 1.000" (25.4mm) extension between Imaging System accessories.

• Set of 2 Accessory Tubes is a convenient set of the 1mm & 2mm spacers described above. This allows great versatility in achieving the necessary distance for proper spacing of field lenses to image plane.

• Set of 6 Accessory Tubes is a complete set of the tubes/spacers described above. This allows great versatility in achieving the necessary distance for proper spacing of field lenses to image plane.

• Mount Ring Set for 4” Diameter Tube provides a rigid means of holding any 4" diameter telescope tube. The individual rings can be spaced any distance apart or from 5.5" to 6.5" apart with the accessory bar or bottom plate attached. This flexibility allows the Mount Ring Set to accommodate a variety of mounts. Each ring has two accessory channels with #10-32 tapped holes, and a #¼"-20 tapped hole on the top and bottom to accept the accessory bar, bottom plate, a stud or bolt as necessary. The accessory bar has a variety of holes to accept Tele Vue Starbeam and even a slot with which you can piggyback a smaller Tele Vue refractor. The included bottom plate (BPL-1098) is drilled to mate to a variety of mounts or mounting adapter plates - including the Tele Vue/Vixen Mount Adapter (AVT-1011) and Tele Vue Gibraltar-5 Head.

• Mount Ring Set for 5" Diameter provides a rigid means of holding any 5" diameter telescope tube. The individual rings can be spaced any distance apart or from 5.5" to 6.5" apart with the accessory bar or bottom plate attached. This flexibility allows the Mount Ring Set to accommodate a variety of mounts. Each ring has two accessory channels with #10-32 tapped holes, and a #¼"-20 tapped hole on the top and bottom to accept the accessory bar, bottom plate, a stud or bolt as necessary. The accessory bar has a variety of holes to accept Tele Vue Starbeam and even a slot with which you can piggyback a smaller Tele Vue refractor. The included bottom plate (BPL-1098) is drilled to mate to a variety of mounts or mounting adapter plates - including the Tele Vue/Vixen Mount Adapter (AVT-1011) and Tele Vue Gibraltar-5 Head.

All indicators accept the optional Indicator to Computer RS232 cable connector for displaying readout on computer with free downloadable software. Most exciting, the indicators and other accessories can be employed as a closed-loop autofocus system with Focusmaster Computer Interface.

• 10-micron Indicator Kit for 2.4" focuser reads down to 10-microns of focus travel.

• 1-micron Indicator Kit for 2.4" focuser reads distance changes down to an astounding 1-micron.

• 10-micron Indicator Kit for 2" focuser indicates focus position down to 10-microns of focus travel.

• 1-micron Fine Indicator Kit for 2" focuser achieves the 1-micron focus position accuracy.

• Focusmate Driver, designed for scopes with black pinion bodies (click image left or see instructions). Works on the following scopes: larger scopes with the following serial #s and higher: TVNP-127is (#1175), TVNP-101is (#1227), & TVNP101 (#1982) ; TV-76 and TV-85 that came with Focusmate 10:1 standard. Permits vibration-free, variable-speed, electronic motor control of the 10:1 Focusmate Fine Focus Accessory through a hand controller or computer control (see More Information section). A tap on the button permits vibration-free focusing in steps as small as approximately 0.0005" or download TVFocusPlus. Switching between manual and motor focus is easily done with a unique quick disconnect that doesn't require tools.

• Focusmate Driver, permits vibration-free, variable-speed, electronic motor control of the 6:1 Focusmate Fine Focus Accessory with chrome shaft and barrel (click image left or see instructions) through a hand controller or computer control (see More Information section). A tap on the button permits vibration-free focusing in steps as small as approximately 0.0005" or download TVFocusPlus. Switching between manual and motor focus is easily done with a unique quick disconnect that doesn't require tools.

• Focusmaster Computer Interface is the necessary link for computer readout and control of focus position. Focusmaster™ was designed to be easy and convenient to use, from its in-line connectors, which allow easy draping of cables, to the TVFocusPlus display/control software. Hardware features include USB port to connect to your computer (data and power), RS-232 port to connect to Tele Vue’s Digital Indicator, RJ22 port to connect to Tele Vue's Focusmate and Red/green status LED.
• Computer control of focus requires Focusmate and Focusmate Driver. Free control software includes: TVFocusPlus (Windows) from TeleVue.com and ShoeString Focus (OSX 10.4) from Stark-Labs.com. The "relative-mode" ASCOM plug-in driver from TeleVue.com allow ASCOM compatible focusing software (such as MaxIM DL and Astroart) to control the Focusmaster.
• For the ultimate in convenience, the addition of the Digital Indicator Kit, Indicator to computer RS232 cable, and use of the "absolute-mode" ASCOM plug-in driver from TeleVue.com allow automatic focus with ASCOM compatible focusing programs.

• Indicator to computer RS232 cable 10 ft, allows readout from our Digital Indicator kits to appear on your (Win95 or greater) computer. Requires 9-pin RS232 port on computer or connect to a USB port through a serial to USB adapter available at computer stores. TVFocus software, downloadable from TeleVue.com, displays readout, can save several focus positions, and includes a night-vision mode.