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Standard VSI Focuser Accessories

Convert your MicroGliders to SBIG STL 2.156"-24tpi, 42mm T-thread, 2"-24tpi SCT, or 1.25" Format

SBIG STL 2.156"-24tpi Threaded Insert Tube for Omicron focusers only: This threaded insert adapter has a 2.25-inch OD barrel with SBIG's proprietary STL 2.156"-24tpi male thread. Screw this adapter into the female 2.156"-24tpi threaded input of your SBIG STL11000 CCD camera, slip the AMGST's barrel-nose into the Omicron focuser (replacing the standard 2" or 6" drawtube), lock it down with our exclusive Quad-Lock system, and you're ready for astroimaging. This MGF2/AMGST/STL combination provides a 2" internal clear aperture. SBIG recommends at least a 1.95" clear aperture. Any smaller and vignetting will become a problem. Note that standard 2" format, like the similar A2LT below, have a 1.75" internal clear aperture, which is not adequate for the STL's giant chip. This 2.25" threaded barrel adapter also has two machined safety indents for the Omicron's four Quad-Lock thumb screws, which prevents the barrel from slipping out of the focuser's tube even if all four thumb screws come loose, which is actually a near impossibility.

Item AMGST: $69

Zero Profile T-Adapter (above left): This unique adapter is designed to fit, with a zero profile, in the 2" rear imaging port of all Versa-Port Slider models, but could also be fitted in a 2" format [slip-fit] focuser. Just screw on your [42mm-0.75mm thread pitch] T-ring to the AZP2T, connect your 35mm camera to your T-ring, and slip it in a 2" focuser. If you are using a CCD camera, just screw this adapter onto the 42mm female threaded input, and slip it into a Glider.

Item AZP2T: $39

2-inch to 1.25-inch Reducer (above center): This industry standard reducer has a 0.375-inch profile and reduces your 2" format focuser to 1.25" so you can utilize 1.25" barrel eyepieces and accessories. This reducer also has a circular dovetail cut into the outside 2" diameter to provide a high level of security. When locked down, with double thumb screws, it is impossible for this adapter to fall out. The thumb screws pushing against this circular dovetail also provide perpendicular pressure creating a very solid connection.

Item AR21: $29

2-inch Threaded Long Barrel Adapter (above right): This adapter is a 2"-24tpi standard male thread to 2-inch standard male barrel-nose format. This special adapter can be screwed into the 2" threaded [slip-ring] input on VP Sliders to [then] be inserted in your focuser like a standard 2" format eyepiece. Conversely, you can also use this adapter to convert your focuser to use 2"-24tpi threaded Schmidt-Cassegrain accessories (i.e. focal reducers, photographic adapters, etc.). The threads duplicate the industry-standard diameter and threads (2"-24tpi) on all commercial visual backs, such as Celestron/Meade Schmidt-Cassegrain telescopes.

Item A2LT: $49

Other Versa-Port accessories, couplings, drawtubes, and accessories may be compatible with the above VSI focusers. See VP Accessories link.

Digital Photo-Sensor Tachometer

SPECIFICATIONS: Digital Tachometer (very limited supply)

This economical photo tachometer rivals units selling for 5 times as much. Just apply the (included) sticky backed reflective tape strip to the edge of any rotational movement (i.e. shaft, disc, wheel, etc.), point the tachometer, and press the button. This high resolution tachometer uses a sophisticated micro-computer LSI-circuit and crystal time base, and has auto-zero adjust. The last value, max. value, and min. value are automatically stored in digital memory and can be displayed by simply pushing the red memory button below the LCD readout. Uses 4 AA batteries, not included.

AC Power Inverter for your Scope & Computer in the Field

SPECIFICATIONS & FEATURES: DC to AC Power Inverter (limited supply)

This inexpensive 12vdc to 115vac power inverter will supply AC household power to your scope and laptop computer in the field, where AC is not available, from any 12vdc battery source (i.e. auto, portable battery pack, etc.). This compact unit will charge your batteries, cellular phone, camera or any device that requires 115VAC house current to recharge. The inverter features a convenient on-off switch, green power-on light, cigarette lighter input cord and plug, ground-type AC outlet receptacle, overload (auto-reset) and back-up fuse protection, and an audible alarm when battery input voltage drops below 10.6vdc.

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