Click photos for Slide Show
|For Sale |
|Status: Active Advert Category: Accessories Advert # 133242|
|Astro Physics CCDT67 0,67x Reducer 2"|
The reducer is in "like new" condition, in original packaging, used two times only.
Optimized for scopes ranging from f/9 to f/18 focal ratio. The 2-element cemented design transmits close to 99% of the incoming light over the range of 420 to 700 nm. The focal length of the telecompressor optics is 12". For refractors, the field is compressed by 0.67x.
This optic is not recommended for telescopes with f/ratios below about f/8-9.
The CCDT67 design allows full corner-to-corner illumination up to an 8300 or APS-C size chip with most catadioptric telescopes. This design does not add coma to the wavefront, and thus, can be used with all flat-field and coma-free telescopes such as Maksutov-Cassegrains, Schmidt-Cassegrains, Ritchey-Chretiens and refractors. The inherent resolution of the telescope is not compromised when using this compressor.
-- Barrel size: 2"
-- Free aperture: 44mm
-- Camera side thread: M48x0.75 male (2" filter thread)
-- Telescope side thread: M48x0.75 female (2" filter thread)
-- Optimal back focus: 85 mm - if you change the distance, the kompressor factor will change. You can change the
distance between M48 connection thread to the sensor from 70mm to 90mm with good results.
-- Focal reduction: 0.67x - f/8 becomes f/5.3, f/9 becomes f/6
-- Fully illuminated and corrected field diameter: 29mm
Posted on: 2018-01-03 10:27:14
Last Updated on: 2018-01-03 10:27:14
New or Repeat ad: repeat
Contact: venzibo   (user details & view my other adverts)
Phone Number (optional):
Location: Sofia, Bulgaria (view map of area)
Click here to respond to this advert
This advert has been viewed 66 times
Report this ad to the webmaster
Close this ad & go back to listings