Sky Instruments
Antares 1.25" Color Filters, Set of 4 (FS2) $54.99
Set of 4 1.25" color filters (#11,#21,#80A,ND25), to enhance planetary imaging. Description Every refractive system, (lenses, correctors, eyepieces, etc.) produce Chromatic Focal Shift: The different colors focus on different planes. By isolating one color more detail will become apparent. Always use a contrasting color to what you are observing. Set of 4 popular 1.25" filters: #11 - Yellow-Green #21 - Orange #80A - Light Blue #ND25 - Neutral Density Filter (25%)
Sky Instruments
Antares 1.25" Neutral Density Filter 13% (... $29.95
When observing the moon or planets, a lot of the time there is just too much light! A-Star Telescope carries the Antares 13% and 25% (ND) neutral density polarizing filters to cut the brightness down to size. Available also for 2" eyepieces. Neutral density filters can reduce brightness across the visual spectrum without losing resolution, enhancing lunar-planetary observing. Can be used stacked with colour filters. The ND13 transmits 13% and threads into all 1.25" accessories. NOT FOR SOLAR VIEWING
Sky Instruments
Antares 1.25" Neutral Density Filter 25% (... $29.95
When observing the moon or planets, a lot of the time there is just too much light! A-Star Telescope carries the Antares 13% and 25% (ND) neutral density polarizing filters to cut the brightness down to size. Available also for 2" eyepieces. Neutral density filters can reduce brightness across the visual spectrum without losing resolution, enhancing lunar-planetary observing. Can be used stacked with colour filters. The ND25 transmits 25% and threads into all 1.25" accessories. NOT FOR SOLAR VIEWING.  
Sky Instruments
Antares 2" Neutral Density Filter 13% (2ND13) $39.95
When observing the moon or planets, a lot of the time there is just too much light! All-Star Telescope carries the Antares 13% neutral density (ND) polarizing filter for two inch eyepieces to cut the brightness down to size.   Neutral density filters can reduce brightness across the visual spectrum without losing resolution, enhancing lunar-planetary observing. Can be used stacked with color filters. The 2ND13 transmits 13% and threads into all 2" accessories. NOT FOR SOLAR VIEWING.  
Sky Instruments
Antares 2" Neutral Density Filter, 25% Tra... $39.95
Neutral density filters can reduce brightness across the visual spectrum without losing resolution, enhancing lunar-planetary observing. Can be used stacked with colour filters. The 2ND25 transmits 25% and threads into all 2" accessories. 
Sky Instruments
Antares 2" Set Of 4 Colour Filters (2FS2) $84.95
Colour filters enhance planetary imaging. Every refractive system, (lenses, correctors, eyepieces etc.) produce Chromatic Focal Shift: The different colours focus on different planes. By isolating one colour more detail will become apparent. Always use a contrasting colour to what you are observing; brightness is not an issue with planets. Set(4) 2" Filters 2-#11,21,80A,ND25
Sky Instruments
Antares T-Adapter For Schmidt-Cassegrains ... $41.00
TAL threads directly onto the back of your Schmidt-Cassegrain and outputs M42 T-thread with a 55mm extension. Description This sturdy metal T-Adapter is the accessory of choice if you’d like to attach an SLR or DSLR camera to the rear cell threads of a Schmidt-Cassegrain telescope for prime focus photography. T-Threads accept camera brand specific T-Ring (sold separately) Both a T-Adapter and T-Ring are required to mount a 35mm SLR camera to your instrument.    
Antlia
Antlia 1.25" H-Beta and OIII Visual and Ph... $149.99
Antlia HB-OIII filter is engineered specifically for night visual nebulae observation at a high contrast and Deep-sky astrophotography. Its transmission is 90% or greater at critical wavelengths (OIII 500.7nm, OIII 495.9nm, and H-Beta 486.1nm). You’ll notice much higher contrast boost to observe Planetary Nebula, Supernova Remnant, Emission Nebula, Diffuse Nebula, and extremely faint nebulae by Antlia HB-OIII filter. When it is used for Astro Deep-sky imaging, it enhances the details of the OIII and H-Beta emission lines with astronomical cameras and DSLRs. Description Antlia HB-OIII filter was coated with almost total suppression of optical density (OD)4 on unwanted wavelength and...
Antlia
Antlia 2" Filter Slider (B-2INCH) $42.95
The filter drawer system is a very convenient and inexpensive alternative to the filter wheel for simple changing of filters and connection of camera and telescope. In the drawer system, the main body are abbreviated with (B) for base, the adapters are abbreviated with (T) for telescope side and (C) for camera side.  Note: each component of the Antlia Filter Drawer System is sold separately. Description Antlia drawer system is composed of three parts, mainbody base with an optical depth of 20mm, telescope adapter and camera adapter, three parts are connected and fixed by screws. All parts of the Antlia filter...
Antlia
Antlia 36mm Filter Holder/Adapter (B4836) $13.95
The filter drawer system is a very convenient and inexpensive alternative to the filter wheel for simple changing of filters and connection of camera and telescope. In the drawer system, the main body are abbreviated with (B) for base, the adapters are abbreviated with (T) for telescope side and (C) for camera side.  Note: each component of the Antlia Filter Drawer System is sold separately. Description The 36mm filter adapter allows you to use 36mm round unmounted filters with the 2" Antlia Filter Slider. Antlia drawer system is composed of three parts, mainbody base with an optical depth of 20mm, telescope...
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...
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...

The Art of the Down-Sell

Only What You Need, Nothing More, We Promise

The Anti-Junk Rule

Our products are painstakingly curated, no junk allowed!

Stress Free Shipping

We guarantee safe, secure shipping. We're on it 'till you get your gear.

Locally Engaged

Helping to grow our communities through clubs events and more.