Bob's Knobs
Bob's Knobs: Replacement Collimation Thumb...
$31.95
Collimate Your Cassegrain Style or Newtonian Style Telescope... Without Tools! It’s easy! Just grab a Bob's Knob collimation thumbscrew and turn. You can even do it while looking through the eyepiece on most telescopes for immediate feedback. And you'll never drop that pesky little Allen wrench or screwdriver into the grass again. Installation is a snap with the included instructions, and you can undo the modification at any time. Details per Individual Knobs Available Below Knobs for C6 f/10 Secondary with Metric Collimation Screw Threads - Black Oxide Steel (C6BO) Fits: Celestron 6” (15 cm) f/10 SCT versions (C6-A-XLT, C6-GT,...
Kendrick Astro Instruments
Kendrick Astro Visual Solar Filters (w/ So...
from $106.00
NEW! Solar Filters with Built-In Sun Finder! The new design has a built in sun finder making centering the sun in your eyepiece very easy. The finder target is visible from both the front and back sides of the filter making centering the sun easy from either end of the telescope. We have replaced the filter rims with three tabs that contain a secure threaded insert and a nylon thumb screw, making the filter much lighter without reducing the security of the fit. The main reason we made this particular change is that many telescopes have dovetails or other attachments...
Starizona
Starizona Modular Filter Slider (54M, 54M)...
$199.99
The Modular Filter Slider improves on our original Filter Slider design by allowing customization through interlocking modular top and bottom plates, making it more adaptable to various optical systems, and by adding better protection against light leaks. This model includes a M54 (male) top plate, for the camera-facing side, as well as a M54 (male) bottom plate, for the scope-facing side. HyperStar Note: If you're ordering a Modular Filter Slider for your HyperStar you will also need to purchase a Filter Slider Adapter for your camera of choice to reach the correct backfocus and attach the Modular Filter Slider to your HyperStar....
Baader Planetarium
Baader Planetarium 7.5mm / 15mm / 40mm t-2...
from $20.95
T-2 Extension Tubes enable you to securely set or vary the spacing between T-2 components. The tubes are available in three lengths, 7.5mm, 15mm, and 40mm, and are provided with an internal T-2 thread at one end and an external T-2 thread at the opposite end. Full internal threading and blackening kills any stray light reflections. T-2 Extension Tubes are used throughout the ASTRO T-2 System™ to provide proper spacing of system components. The Alan Gee Mark II Telecompressor may be configured in various ways that benefit from the ability to vary the spacing of the lens relative to camera...
Baader Planetarium
Baader Planetarium 2" ClickLock M54a x 1 S...
$124.95
Baader 2" ClickLock M54a x 1 clamp – for all focusers from Sky-Watcher and Orion (Newton) with M54x1 female thread. A small rotation by 20° with gentle fingertip pressure to the knurled lever is enough to securely clamp every 2" accessory. Ratchet function – features acoustic and haptic display of the clamp-position. This way you can hear and feel in darkness without looking if the clamp is opened or closed. Compression tension-ring of thick-walled hard bronze, keeps its shape even after many years of use and holds expensive accessories securely - without causing scratches or pressure points on your accessories....
Antlia
Antlia OIII 3nm Pro Filters (OIII-3NM-PRO)
from $344.25
Antlia OIII Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nmbandpass. As the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance contrast of emission targets by lowering the unwanted background signal. Antlia OIII 3nm Pro filters are designed to deliver 85% transmission at the 500.7nm line which provides you with the maximum signal and well defined nebulae structures.> Conventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL) shift. We guarantee T>85% within 1nm range of the center bandwidth, which means that the 3nm Pro narrowband filter can guarantee...
Antlia
Antlia 3nm Narrowband Sulfur II (SII) Pro ...
from $344.25
Antlia SII Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance contrast of emission targets by lowering the unwanted background signal. Antlia SII 3nm Pro filter is designed to deliver 88% transmission at the 671.6nm line which provides you with the maximum signal and well defined nebulae structures. Conventional broader narrowband filters cause a heavy loss in transmission due to the strong (Center Wavelength (CWL)-shift. We guarantee T>88% within 1nm range of the center bandwidth, which means that the 3nm Pro narrowband filter can guarantee...
Antlia
Antlia 3nm Narrowband H-Alpha (Ha) Pro Fil...
from $344.25
Antlia H-alpha Pro narrowband filter optimizes the FWHM (full width half maximum) to 3nm bandpass. As the bandwidth becomes narrower, the 3nm Pro narrowband filters enhance contrast of emission targets by lowering the unwanted background signal. Antlia H-alpha 3nm Pro filters are designed to deliver 88% transmission at the 656.3nm line which provides you with the maximum signal and well defined nebulae structures. Conventional broader narrowband filters cause a heavy loss in transmission due to the strong Center Wavelength (CWL)-shift. We guarantee T>88% within 1nm range of the center bandwidth, which means that the 3nm Pro narrowband filter can guarantee...
Starizona
Starizona Modular Filter Slider (42M, 48F)...
$199.99
The Modular Filter Slider improves on our original Filter Slider design by allowing customization through interlocking modular top and bottom plates, making it more adaptable to various optical systems, and by adding better protection against light leaks. This model includes a M42 (male) top plate, for the camera-facing side, as well as a M48 (female) bottom plate, for the scope-facing side. HyperStar Note: If you're ordering a Modular Filter Slider for your HyperStar you will also need to purchase a Filter Slider Adapter for your camera of choice to reach the correct backfocus and attach the Modular Filter Slider to...
Starizona
Starizona Modular Filter Slider Plates (MF...
$59.95
This Starizona slider plate is designed to fit on the top or bottom of the Starizona modular filter slider. Compatible only with the modular filter slider. Not compatible with Starizona's original filter slider.
Styles Available:
M42 Male
M42 Female
M48 Male
M48 Female
M54 Male
RASA8
Starizona
Starizona Modular Filter Slider - Extra Fi...
$59.95
This Modular filter slider is the next generation of Starizona filter sliders! This design allows customization through modular top and bottom plates that interlock, and ultimately makes the filter slider more adaptable to different optical systems. This adaptability provides better protection against leaks of light. The top and bottom plates on the Starizona Modular Filter Slider are interchangeable, and the plate options include M42 (male), M42 (female), M48 (male), M48 (female), and M54 (male). The threaded plates will help secure the connection of the Starizona Modular Filter Slider drawer. Each plate is is threaded with common, standardized threads. With this...
Astronomik
Astronomik 1.25"/2" Deep-Sky RGB Filters (...
from $435.95
The new Astronomik Deep-Sky RGB filters are the result of a long and detailed process of research and development. We have created the most advanced set of RGB filters for Deep-Sky imaging available today. The transmission curves of the three filters are designed to give you strong and vivid colors with a strong reinforcement of the most important emission lines. Data taken with the new Astronomik Deep-Sky RGB filters is easier to process into a beautiful final masterpiece. Additional to the Deep-Sky RGB filters Astronomik now offers you three different Luminance filters. The different spectral window of each new Luminance...