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T-mount DX-60W
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Flattener 0.93X
The Flattener 0.93X with 2-group 2-element
keeps the sharp image at the center of the
field of the FOA-60 as it is. At the same
time, it can correct the edge aberration
at the prime focus and can shorten the
focal length a bit to 495mm (f/8.2) as well.
With use of the Flattener 0.93X, its F ratio
becomes f/8, a bit slower, but it can produce
images of 10 micron RMS-SPOT across the
field. This is most well-suited for imaging
deep sky and the outer corona in the total
eclipse. Also, this is good for imaging birds
and lands as a 500mm (f/8) super telephoto
lens. The Flattener with 50.8 (2") sleeve can
be attached and detached quickly to move
from visual use to imaging mode.
▼Imaging System
with the Flattener 0.93X
Effective Focal Length : 495mm
Effective Focal Ratio : f/8.2
Image Circle :
φ
44mm
Caution:
Do not use the Flattener 0.93X and the
Extender 1.7XR together. Use just one at a
time.
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CA-35 (50.8/2")
For imaging at the prime focus, the CA-
35 (50.8/2") is required to attach a DSLR
camera. It can be attached with the 50.8
(2") Adapter (SKY-90) to connect a DSLR
camera by way of the T-Mount DX-WR. If
the flat field is required, use the Flattener
0.93X.
T-mount DX-WR
DSLR Camera
DSLR Camera
CA-35 (50.8/2”)
Flattener 0.93X
50.8(2”) Adapter (SKY90)
50.8(2”) Adapter (SKY90)
