Before the image generated by the telescope reaches the camera sensor, additional correction is useful:
- Flatteners smooth the slightly curved image from mirror telescopes and Schmidt-Cassegrain optics.
- Coma correctors eliminate a Newtonian telescope’s coma defect
- Reducers are strictly speaking not correctors. They simply shorten the focal length and therefore reduce the required exposure time.
The properties of a reducer are often included in the flatteners and coma correctors, that is, these lenses also change the focal length.
These correctors are not required for purely visual observation, in this case the quality of the eyepiece is more important.
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Celestron
Reducer 0.63x / Corrector
( 4.5 / 5 )
$ 175.00
ready for shipping in 1-2
weeks
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Baader
MPCC Mark III - Multi Purpose Newton Coma Correktor
$ 218.00
ready for shipping in 1-2
weeks
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Omegon
Pro Coma Corrector for Astrograph
$ 89.00
Product can be shipped as of 15.09.2026
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RRP:
$ 193.00
TS Optics
F/6.3 focal reducer/corrector for SC telescopes
RRP:
$ 193.00
Our price:
$ 140.00
ready for shipping in 3-7
days
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RRP:
$ 930.00
TeleVue
Komakorrektor Paracorr Type 2
RRP:
$ 930.00
Our price:
$ 755.00
ready for shipping in 6-10
weeks
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William Optics
Adjustable Flattener Reducer Flat6AIII
$ 350.00
ready for shipping in 24
h
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Baader
MPCC V-1 Mark III Newton Coma Correktor Set 2"
$ 264.00
ready for shipping in 1-2
weeks
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Skywatcher
0.85x Focal Reducer/Corrector for Evostar-100ED DS-PRO
$ 350.00
ready for shipping in 24
h
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TS Optics
2'' CCD reducer, 0.67X for RC telescopes up to f/8
$ 299.00
ready for shipping in 24
h
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TS Optics
Flattener/Reducer 0.8x CF-APO 80
$ 305.00
ready for shipping in 3-7
days
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Skywatcher
2", F4 aplanatic coma corrector
( 5 / 5 )
$ 428.00
ready for shipping in 1-2
weeks
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RRP:
$ 339.00
Askar
Flattener 1.0x 103APO
RRP:
$ 339.00
Our price:
$ 304.00
ready for shipping in 24
h
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Skywatcher
Esprit-150ED M48 field flattener
$ 486.00
ready for shipping in 1-2
weeks
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TS Optics
0.5X focal reducer with 2” filter thread
$ 94.00
ready for shipping in 24
h
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William Optics
Adjustable Flattener Reducer Flat7A
$ 1,120.00
ready for shipping in 3-5
weeks
