14
ASTROPHOTOGRAPHY
While telescopes are designed to be used visually, they may be easily converted into a super photographic
lens using one of our dedicated photographic correctors. You remove the eyepiece, star diagonal and 2”
adapter from the focuser and you replace it with either our field flattener or focal reducer/field flattener.
Important! When using a field flattener or flattener/reducer, it is essential that the camera’s sensor
(CCD chip) is positioned at a precise distance from the back of the field flattener or flattener reducer.
If you see elongated stars in the corners you will need to adjust this spacing. Call or e-mail us if you
need assistance!
There are two types of correctors made for the
SVX152T
, one is a flattener and one is a
reducer/flattener.
SFF4 Flattener
: The SVX152T is an f-8 optical system with a 1200 mm focal length.
The SFF4-152 will convert your telescope into a 1200 mm focal length f-8 super tele-
photo lens. The SFF4 works with cameras with full frame and smaller sensors.
SFFRR .72 Reducer/Flattener
: The large SFFRR .72 reducer flattener will flat-
ten the field and reduce the photographic speed. Using it you will be shooting at
912 mm, f-6. This reducer/flattener will work with cameras using full frame or
smaller sensors, same as above.
The use of this reducer/flattener requires more inward focus. With this telescope
simply rack the focuser inward. (See page 16 for more detail)
Without a corrector, stars will become
elongated away from the center
With a properly spaced corrector stars will
appear as they should
