Accessories for the discontinued STV, ST-4, ST-5C, and ST-237/A Cameras
and Miscellaneous Accessories 
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cfw5c_small.jpg (32812 bytes) CFW5C Filter Wheel with RGB+C Filters
This is the internal filter wheel for the STV, ST-5C and ST-237/A cameras.   It contains very high quality dichroic RGB filters and a matching clear filter custom made for these cameras, parfocal to f/2, for Fastar use.  Note that the filters are premanently attached to the filter carousel and cannot be changed.  Limited to quantity on hand.
cfw10small.jpg (8976 bytes) CFW10-SA Ten Position Filter Wheel
The CFW10 allows you to carry a large array of standard 1.25" filters in one filter wheel without having to change carousels.  LRGB+Clear filters for color imaging can be installed along with several narrow band filters such as H-alpha, O[III] and S[II], or a complete color plus photometric set.  The CFW10-SA will work with any camera in its stand alone mode.   More info...
rgb_50_2_small.jpg (36951 bytes) RGB and UBVRI Filters for CFW10-SA Filter Wheel
Red, Green, Blue, plus Clear and Luminance filters for color imaging are available in several varities.  Our standard set suppresses light pollution while giving an excellent balance for all ST cameras.  Astrodon filters are parfocal with other Astrodon narrowband filters and offer 1:1:1 exposure ratios.  H-alpha, O[III] and S[II] filters are available for narrow band imaging of emisison nebula.  Professional grade UBVRI filters are available for photometric studies.   More info...  
nosepieces_small.jpg (38796 bytes) Extra Nosepiece:  1.25" and 2"
These T-thread nosepieces screw into the female t-threads on ST cameras.   All ST cameras include at least one nosepiece.  Each nosepiece is threaded to accept filters and notched for extra security in the event the retaining screw comes loose slighlty during the night.  For a more solid connection to Schmidt-Cassegrain scopes, we also offer the SCT to T-thread Visual Back (see below).  
fr237_small.jpg (19693 bytes) FR237 Focal Reducer
This custom focal reducer screws into the nosepiece of the STV, ST-5C or ST-237/A cameras to reduce an F/10 optical system down to F/3.75.  It is highly recommended for imaging with these smaller cameras when using an SCT of any size.  This lens is included in the eFinder system below, or it can be purchased separately.   More info...
eFinder_small.jpg (41729 bytes) eFinder focal reducer and 25mm f/4 guiding scope
Many owners of the ST-5C or ST-237/A cameras use them as autoguiders.  The eFinder accessory originally made for the STV works very well with the ST-5C and ST-237/A.  The efinder consists of a doublet lens held at the end of a tube that screws into the t-threads on the face of the camera.  The entire assembly is extremely rigid.  When attached, the lens acts as a 100mm FL f/4 guide scope capable of 1 arcsecond guiding with a wide field of view.   More info... 
402_cla5assy_small.jpg (18386 bytes) CLA-5 Camera Lens Adapter with T to C Mount Adapter
This lens adapter comes in two parts:  T-to-C Thread adapter ring and a C-thread to 35mm lens adapter.  Both are necessary for using a 35mm camera lens with the ST-402/1603/3200 cameras.  However, if you have C-mount lenses, only the T-to-C Thread adapter ring is required.  35mm camera lenses supported are Canon FD (manual focus only) and Nikon.
T_to_C_adapter_small.jpg (33288 bytes) T to C Mount Adapter
This adapter ring is threaded on the outside with T-threads and inside with c-mount threads.  When used in place of the nosepiece on an ST-402/1603/3200 model camera, c-mount lenses can be used for wide field imaging. 
t-thread_visualback_small.jpg (26881 bytes) SCT to T-thread Visual Back
For a more secure attachment of your camera to a Schmidt-Cassegrain telescope (or any scope using typical SCT threads) replace your nosepiece with this adapter.  One end screws into the female t-threads on the front of the camera or filter wheel, and the other end screws onto the rear cell threads typically found on most commercial Schmidt-Cassegrain telescopes.  A matching hard plastic dust cap screws over the t-thread end if the camera is removed for any period of time.
quick_disconnect_small.jpg (41849 bytes) Quick Disconnect
The Quick Disconnnect accessory lets you quickly remove the camera from the telescope, replace it with an eyepiece, and then return the camera to the telescope all without losing focus or position.  It also lets you easily rotate the camera without losing focus.  It is designed for use with an SCT.   More info... 
male_to_male_t_small.jpg (15091 bytes) Male-to-Male T-thread adapter
This adapter is also threaded internally for 1/25" filter cells, so it can be used to hold a single filter when attached to the front of the camera. 
transformer1_small.jpg (20075 bytes) 110VAC to 12VDC Wall Transformer
This 110VAC to 12VDC supply is a replacement for the power supply that is included with the STV, ST-5C and ST-237/A cameras.  The polarity is correct for this product (center pin is negative). 
12VDC_stv_small.jpg (35005 bytes) 12VDC Power cord and cigarette lighter adapter
This 12VDC cord works with the STV, ST-5C and ST-237/A cameras.  Battery clips are provided and a cigarette lighter plug is used for convenience when using typical portable power packs or an automobile battery.

relay_adapter_cyan_small.jpg (27392 bytes)

Relay Adapter
The relay adapter box converts the ST-5C or ST-237/A to mechanical relays (The STV already has mechanical relays).  Most commercially available mounts such as Software Bisque, AP, Meade and Celestron do not require mechanical relays, but others, such as the classic Losmandy G-11 do require some other form of electrical isolation between the camera and the mount.  If you are not sure, check with your mount manufacturer.

relay_cable1_small.jpg (25623 bytes) Tracking Cable
This replacement 6-pin RJ-11 to RJ-11 cable connects the camera to the autoguider ("CCD") port of your telescope drive.  It is supplied with all STV, ST-5C and ST-237/A cameras.
st4_desiccant_ring_small.jpg (22168 bytes) Desiccant Canister for ST-4
This is a replacement part for the original desiccant ring used in the ST-4.   It will fit only those ST-4 autoguiders that were designed for the old style desiccant ring.  More info...