Focal Reducers and Correctors
Large parabolic mirrors are perfectly apt for Deep Sky imaging since they deliver a very large field and enable very short exposure times. However this comes at the price of off axis coma and some residual astigmatism. Coma will distort off axis stars into "comets" which effectively reduces the usable field considerably when imaging. Refractor telescopes can suffer from field curvature which also has a negative impact on images especially towards the edges. Coma correctors and field flatteners are image correctors designed to reduce these effects.
Focal reducers can also be very useful for astrophotography. As the name implies they effectively reduce the focal length of your telescope. As the aperture obviously does not change this has two effects, firstly the focal ratio becomes faster and secondly the field of view becomes wider. A faster focal ratio in simple terms means you need a shorter length exposure to capture the same amount of light.
Dual purpose correctors achieve image correction and focal reduction at the same time.
Focal reducers can also be very useful for astrophotography. As the name implies they effectively reduce the focal length of your telescope. As the aperture obviously does not change this has two effects, firstly the focal ratio becomes faster and secondly the field of view becomes wider. A faster focal ratio in simple terms means you need a shorter length exposure to capture the same amount of light.
Dual purpose correctors achieve image correction and focal reduction at the same time.
Showing 15 of 15 products
-
Camera Adapter
£22.50lets you connect your DSLR to any telescope with a 2" push-fit focuser barrel -
Celestron Focal Reducer Corrector for SCT Telescopes
£159.00Celestron Focal Reducer Corrector for SCT TelescopesOut of stock -
Celestron Reducer Lens .7x - EdgeHD 1100
£869.99Celestron Reducer Lens .7x - EdgeHD 1100Out of stock -
Celestron Reducer Lens .7x - EdgeHD 1400
£869.99available to order - leadtime typically 7 days -
Celestron Reducer Lens .7x - EdgeHD 800
£429.00Out of stock -
Celestron Reducer Lens .7x - EdgeHD 9.25
£469.00available to order - leadtime typically 7 days -
Explore Scientific 0.7x Reducer/corrector 3"
£339.00Shipping typically taking 5-7 working daysOut of stock -
Explore Scientific HR Coma Corrector
£289.00Out of stock -
Field Flattener with T-Ring adaptor thread
£95.00Out of stock -
M48 Field Flattener for Esprit 100ED
£205.00Out of stock -
Revelation 2" Eyepiece holder for Schmidt Cassegrain
£18.00Threads on the rear of any Meade or Celestron SCT Telescope in place of a conventional 1.25-inch visual backOut of stock -
Revelation Projection Camera Adapter 1.25"
£18.00A two-in-one adapter that includes a T adapter to 1.25" nose and an extension tube.Out of stock -
Revelation T Adaptor 1.25"
£18.00Allows DSLR cameras to be attached to any telescope that uses a 1.25" eyepiece holderOut of stock -
Revelation Universal 2" T-Adapter
£18.002" T-Adapter, threaded for standard 2" filtersOut of stock -
Sky-Watcher Coma Corrector (2") for Newtonian Reflectors
£169.00Out of stock