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Optec Temperature Compensating Focusing Systems (TCF-S)
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FLI - Microline Liquid Cooling Option with Double Shut-Off
FLI - Microline Liquid Cooling Option with Double Shut-Off ... Learn More
FREE SHIPPINGModel#: LC-DS(48 States)
$389.00 -
Lunt Solar Systems 100mm H-Alpha Filter - w/ B1800 for 1.5" Focusers
The new Lunt Solar Systems LS100 Hydrogen-Alpha Filter incorporates a unique design feature ... Learn More
Model#: LS100FHa1_B1800
$5,744.00 -
TeleGizmos Standard Solar Scope Cover for Meade 12" LightBridge Dobsonian
The new TeleGizmos Solar Telescope Cover is made from multi-layer ... Learn More
Model#: TGLB-12
$89.00 -
Astrodon - 50mm Gen 2 Unmounted Square G' Filter
Astrodon's new improvements of photometric Sloan filters generation 2 feature excellent out of band clocking and other edge-blackended compounds to reduce stray light reflections to assist in CCD imaging.
... Learn MoreFREE SHIPPINGModel#: g'2-50S(48 States)
$390.00 -
Astronomik - Dark Filter - 1.25"
Do you have a CCD camera without a mechanical shutter and would like to do dark frames without continually monitoring your equipment?
... Learn MoreModel#: DARK-1
$39.95 -
Borg - 77 ED II f/4.3 Astrograph Set (2178 + 7135 + 7835 + 7704)
- BORG 77EDII OTA
- 0.65x reducer
- Total of 6 elements
- 330mm focal length
- F4.3
- 35mm full-frame coverage
FREE SHIPPINGModel#: B07743(48 States)
$2,175.00 -
carbon12 - Celestron NexStar / CGE RS-232 Serial Cable (Coiled) for Sky-Fi & StarSeek
Avoid extra cables and RS-232 plugs by using the Custom Celestron CGE, made specifically for using SkyFi & Starseek Wi-Fi setup with the Celestron NexStar Hand Controller. ... Learn More
Model#: CGE-SFC
$32.95 -
carbon12 - Meade ETX, LX – RS-232 Serial Cable for Sky-Fi and Starseek
Avoid extra cables and RS-232 plugs by using the Custom Meade ETX Series, LX-90, LXD55/75 to Sky-Fi Serial Cable. This cable is made specifically for using a Sky-Fi or Starseek Wi-Fi setup with the Meade ETX-90AT, Meade ETX-105AT, Meade ETX-125AT, LXD55/75 and LX-90 telescopes utilizing the AutoStar 497 Handset. ... Learn More
Model#: ETX-SFC
$32.95 -
carbon12 - ServoCAT & ServoCAT Jr. – ( Straight 18") RS-232 Serial Cable for Sky-Fi and Starseek
Avoid extra cables and RS-232 plugs by using the Custom ServoCat to Sky-Fi Cable, made specifically for using Sky-Fi & Starseek Wi-Fi setup with ServoCat Gen 1 & 2 using Argo Navis© GoTo. ... Learn More
Model#: ServoCAT-S
$32.95 -
carbon12 - ServoCAT & ServoCAT Jr. – (Coiled) RS-232 Serial Cable for Sky-Fi and Starseek
Avoid extra cables and RS-232 plugs by using the Custom ServoCat to Sky-Fi Cable, made specifically for using Sky-Fi & Starseek Wi-Fi setup with ServoCat Gen 1 & 2 using Argo Navis© GoTo. ... Learn More
Model#: ServoCAT
$34.95 -
carbon12 - Starmaster RS-232 Serial Cable (Coiled) for Sky-Fi and Starseek
Avoid extra cables and RS-232 plugs by using the Custom Starmaster to Sky-Fi Cable. The one cable made specifically for using Sky-Fi & Starseek Wi-Fi setup with Starmaster using StarTrack and Sky Commander GoTo. ... Learn More
Model#: SM-SFC
$32.95 -
carbon12 - Starmaster RS-232 Serial Cable (Straight) for Sky-Fi and Starseek
Avoid extra cables and RS-232 plugs by using the Custom Starmaster to Sky-Fi Cable. The one cable made specifically for using Sky-Fi & Starseek Wi-Fi setup with Starmaster using StarTrack and Sky Commander GoTo. ... Learn More
Model#: SM-SFS
$32.95 -
carbon12 - Takahashi RS-232 Serial Cable for Sky-Fi and Starseek
Avoid extra cables and RS-232 plugs by using the Custom Takahashi to Sky-Fi Cable. The one cable made specifically for using Sky-Fi & Starseek Wi-Fi setup with Takahashi Mounts: EM-200, EM-200 Jr., EM11, NJP, EM400 & EM500. ... Learn More
Model#: TAK-SFC
$59.95 -
Explore Scientific - 127mm f/6.5 Achromatic Refractor OTA with Accessories
... Learn More
FREE SHIPPINGModel#: DAR127065-00(48 States)
$649.99 -
Explore Scientific - AR152 f/6.5 Air-Spaced Doublet Achromat Refractor
The AR152 (six-inch), with its larger aperture optics gathers 44% more light over the AR127 (five-inch) model, providing much brighter images and higher resolution
... Learn MoreFREE SHIPPINGModel#: DAR152065-00(48 States)
Regular Price: $1,120.00
Special Price: $749.00
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Explore Scientific - AR152 f/6.5 Air-Spaced Doublet Achromat Refractor,
The AR152 (six-inch), with its larger aperture optics gathers 44% more light over the AR127 (five-inch) model, providing much brighter images and higher resolution ... Learn More
FREE SHIPPINGModel#: DAR152065-00(48 States)
Regular Price: $1,120.00
Special Price: $749.00
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Levenhuk - C1400 NG 14 Mpx Digital Camera, USB 2.0
Levenhuk C1400 NG is a very powerful 14-Mpx digital camera for microscopes; it is capable of capturing sharp and saturated images in true color.
... Learn MoreFREE SHIPPINGModel#: 35957(48 States)
$549.95 -
Opticstar - Optimum ONE - D80S Gold DS
80mm f/6.5 ED Fluorite Doublet optics, dual speed Crayford focuser. ... Learn More
FREE SHIPPINGModel#: D80S(48 States)
$799.00 -
TeleGizmos - Standard Solar Cover for 14" SCT's on Alt-Azimuth Fork Mounts
The new TeleGizmos Solar Telescope Cover is made from ... Learn More
Model#: TG14
$57.00 -
TeleGizmos - Standard Solar Cover for 14" SCT's & Maks on a German Equatorial Mount
The new TeleGizmos Solar Telescope Cover is made from multi-layer ... Learn More
Model#: TGG2
$62.00
Mechanically, the TCF-S is a robust Crayford style motorized focuser with high repeatability, no play and nearly zero backlash of only 0.0013 inch. Optecs implementation is ideal for applications which require exact focus such as CCD imaging or film astrophotography. A geared stepper motor rotates the drive shaft with one step rotation of the motor equal to a 0.000086 inch movement of the drawtube. The unit adds 3.5 inches to the telescope's back focus as measured from the front to the end of the drawtube when at the mid-focus position. The total travel of the drawtube is 0.6 inches or 7000 steps. A pair of pushbuttons control the direction of focus and the DRO (digital read-out) displays the current position. The TCF-S focuser can easily handle cameras and instrument packages weighing up to 10 pounds. The TCF-S can be used by itself or with a PC for automatic focus with some of the popular camera control software.
- Heavy-duty Crayford style 2" focuser
Compensates for focal shift due to temperature - Supports instruments up to 10 pounds
- Easy to use control box
- Use with or without a PC
- 4-digit readout for position
- Simple Learn procedure for determing TC
- Shut-off procedure remembers last position
- Compatible with major camera control software for autofocus
- Free control/interface program with open source
The most important advantage of the TCF-S is its ability to compensate for the focal shift of the telescope due to temperature change. The image plane of the common SCT telescope with aluminum tube can change as much as 0.01 inch per degree Centigrade. This would make long exposures difficult at best.
