TMB-92 Signature Series 92mm APO Refractor. This is the SS version with the tube extender to allow wide field bino viewing and 3 inch Feather Touch focuser. Rings and D rail included. Lens is clean with no issues. Everything is in very good working order. No dings, dents or scratches except for a very tiny mark on cap shown in the pictures. A little fading on the anodizing of the Feather Touch in one area. Comes in the original TMB case. I am the 2nd owner. Price $1,800.00.
Here are factory details:
TMB-92 Signature Series 92mm APO Refractor OTA
The TMB-92 Signature Series 92mm f/5.5 triplet apo is a very compact refractor for the serious observer and traveler. Measuring only about 13.25" long with the focuser and dewshield retracted for storage and travel, the TMB-92 optically and mechanically fills the void left by the discontinued 90mm Astro-Physics Stowaway (a legendary scope that sells for up to $6000 on the used market).
The TMB-92 puts exceptionally high optical and mechanical quality in a truly tiny package. It is ideal for the serious observer who will accept nothing less than unsurpassed imaging and visual observing performance in a supremely portable body you can take with you anywhere in the world.
The TMB-92 is an exceptional grab and go scope for observing and imaging - both within the solar system and out to the furthest reaches of infinity. Its images of subtle low-contrast lunar and planetary details are razor-sharp, with realistic and highly saturated color. Those images are free from chromatic aberration of any type, thanks to the ED (Extra-low Dispersion FPL-53 glass) element in the scope's triplet optics. The latest antireflection multicoatings and knife-edge internal baffles assure the maximum image contrast possible. Image excellence is limited only by the seeing conditions, not by any aberration or short-coming in the telescope.
Multicoated optics: Fully multicoated on all surfaces with the latest antireflection materials for exceptionally high light transmission and excellent contrast. Light transmission is so high that the optics seem to virtually disappear when viewed from head on.
Collimatable lens cell: The lens cell has three sets of push/pull collimating screws that will let you tweak the optical collimation after rough handling or extensive travel. This assures that optimum visual and photographic performance is only a few moments away.
Internal light baffles: Contrast-enhancing knife-edge light baffles in the optical tube and focuser provide truly dark sky backgrounds and high terrestrial contrast. In addition, the edges of the objective lens are blackened to eliminate contrast-reducing stray internal reflections.
Retractable dew shield: The self-storing retractable dew shield/lens shade slows the formation of dew on the lens to extend your undisturbed observing time. It also improves visual and photographic contrast by shielding the lens from off-axis ambient light (the neighbor's yard light, moonlight, etc.)
Dual-speed microfine #3025 3" Feather Touch rack and pinion focuser: The precision-made 3" diameter drawtube non-vignetting focuser is a genuine Feather Touch from Starlight Instruments, a company known world-wide for making the finest and most reliable focusers available to the amateur astronomer. The focuser has dual-speed focusing. There are two coarse focusing knobs. The right knob also has a smaller concentric knob with a 10:1 reduction gear microfine focusing ratio. This provides exceptionally precise image control during very high magnification visual observing, and during critical 35mm or CCD imaging. All focus knobs are ribbed, so they are easy to operate, even while wearing gloves or mittens in cold weather. Multiple internal baffles in the focuser drawtube assure high contrast.
Rotating eyepiece holder: The entire focuser can be rotated a full 360 degrees without disturbing the focuser drawtube position. This lets you rotate the eyepiece/accessory holder to line up a camera in either a landscape or portrait orientation (or any orientation in between) without disturbing the focus, as well as put a star diagonal and eyepiece into the most comfortable observing position. Three large locking knobs on the focuser body let you temporarily lock your camera or accessories in the desired orientation, then change that orientation with a simple twist of the wrist.
Focusing scale: The 65mm (2.65") travel focuser drawtube has a scale marked in 1mm increments so you can note individual focuser positions for easy return to the correct focus when switching between visual use and photography. A large lock knob on top of the focuser lets you lock in your photographic focus.
Extension tube: The minimum length of the TMB-92 is 13.25" with the dew shield and focuser retracted for traveling and for long equipment train CCD imaging. A 2.25" extension tube is supplied to provide the proper back focus for convenient visual use and 35mm/webcam/Deep Sky Imager type astrophotography. This installs between the optical tube and focuser. A groove in the extension tube engages the brass thumbscrews in the optical tube (that normally control focuser rotation) to hold the extension tube firmly to the optical tube. Three nylon-tipped metal thumbscrews at the opposite end of the extension tube now hold the focuser in place and allow focuser rotation, just as the brass thumbscrews in the optical tube do when the extension tube is not used. A Teflon insert in the focuser end of the extension tube assures smooth focuser rotation. When the extension tube is not used, the available back focus allows you to reach focus with virtually any combination of photographic accessories (CCD camera, filter wheel, electric focuser, adaptive optics system, etc.). When the supplied 4" diameter by 2.25" long extension tube is threaded into place between the focuser and the optical tube, the maximum overall scope length is increased to 20.75", the proper length to achieve visual focus with a star diagonal and eyepiece.
Compression ring eyepiece holders: The focuser drawtube ends in a 2" eyepiece holder that uses a non-marring soft brass compression ring to hold a 2" star diagonal and accessories in place. The compression ring won't scratch the barrel of your star diagonal and accessories as an ordinary thumbscrew can. Also supplied is a 1.25" eyepiece holder that slips into the 2" compression ring holder to let you use a 1.25" star diagonal or image erecting diagonal. Like the 2" eyepiece holder on the eyepiece holder rotation mechanism, the 1.25" adapter also uses a non-marring soft brass compression ring to hold 1.25" star diagonals and accessories in place. The 2" accessory holder can be removed from the drawtube to allow the installation of custom A-P type photo accessories available directly from Starlight Instruments.
Last edited by TakMan; 06-04-2015 at 07:29 PM.
Reason: sold
