The flattener is an arrangement of lenses that flatten the image field, as this is slightly curved by the primary optical system. This curvature causes stars to appear less sharp toward the edge of the field of view on photographic images. The flattener, also known as a field flattener lens, corrects this error.
Celestron
Reducer 0.63x / Corrector
( 4.5 / 5 )
$ 188.00
ready for shipping in 24
h
Omegon
Field Flattener 2''
( 4 / 5 )
$ 259.00
ready for shipping in 24
h
TS Optics
Flattener/Reducer 0.8x CF-APO 80
$ 307.00
ready for shipping in 24
h
Skywatcher
0.85x Focal Reducer/Corrector for Evostar-100ED DS-PRO
$ 353.00
ready for shipping in 24
h
William Optics
Flattner Flat61A for Z61
$ 388.00
ready for shipping in 24
h
Skywatcher
Flattener 0.85x EvoStar 72 ED
$ 353.00
ready for shipping in 24
h
William Optics
Adjustable Flattener Reducer Flat6AIII
$ 388.00
ready for shipping in 24
h
PrimaLuceLab
GIOTTO Flat Field Generator Celestron Origin
$ 383.00
ready for shipping in 24
h
Skywatcher
Flattener Evoguide 50ED
$ 136.00
ready for shipping in 24
h
Skywatcher
Flattener 0.92x Evostar 100 EDX & Esprit 70 EDX
$ 247.00
ready for shipping in 24
h
Skywatcher
Flattener Esprit 120
$ 411.00
ready for shipping in 24
h
Skywatcher
Flattener 0.77x Esprit 150
$ 510.00
ready for shipping in 24
h
Skywatcher
Esprit-150ED M48 field flattener
$ 489.00
ready for shipping in 24
h
Skywatcher
Field Flattener (with T-Ring adaptor)
$ 152.00
ready for shipping in 24
h
Skywatcher
Flattener 0.85x Evostar 120 EDX
$ 353.00
ready for shipping in 24
h
William Optics
Flat GT
$ 447.00
ready for shipping in 3-7
days
Tecnosky
Adjustable Flattener Reducer FF 0.8x
$ 351.00
ready for shipping in 24
h
Skywatcher
Evolux 62ED 0.9x flattener
$ 376.00
ready for shipping in 24
h
APM
Riccardi Flattener Model 1
$ 590.00
ready for shipping in 1-2
weeks
TS Optics
Flattener/Reducer 0.8x CF-APO 102
$ 530.00
ready for shipping in 24
h
Explore Scientific
ES MPCC field flattener ED APO + Nikon T2
$ 171.00
ready for shipping in 24
h
PrimaLuceLab
GIOTTO Flat Field Generator 320
$ 1,180.00
ready for shipping in 1-2
weeks
Skywatcher
Flattener Esprit 100
$ 313.00
Product can be shipped as of 15.01.2026
TS Optics
Flattener 1.0x M92
$ 530.00
ready for shipping in 3-7
days
TS Optics
Flattener 1.0x M63
$ 351.00
ready for shipping in 3-7
days
Tecnosky
Four Elements Flattener/Reducer 0,8x
$ 207.00
ready for shipping in 1-2
weeks
PrimaLuceLab
GIOTTO Flat Field Generator 150
$ 371.00
ready for shipping in 1-2
weeks
Askar
Flattener 1.0x 103APO
$ 305.00
ready for shipping in 3-5
weeks
Geoptik
Flatfield Generator 308mm
$ 329.00
ready for shipping in 3-5
weeks
TS Optics
Reducer/Corrector Photoline 0,79x 3"
$ 470.00
ready for shipping in 3-7
days
Baader
Barlow Lens Fluorit Flatfield Converter (FFC) 2"/T2
$ 860.00
ready for shipping in 1-2
weeks
PrimaLuceLab
GIOTTO Flat Field Generator 120
$ 324.00
ready for shipping in 1-2
weeks
Skywatcher
Flattener 0.77x Esprit 120
$ 510.00
Product can be shipped as of 15.01.2026
Skywatcher
Evolux 82ED 0.9x flattener
$ 376.00
ready for shipping in 1-2
weeks
TS Optics
Photoline 1.0x Generation II
RRP:
$ 470.00
Our price:
$ 435.00
ready for shipping in 1-2
weeks
William Optics
Flat6A III Special Edition FLT91
$ 447.00
ready for shipping in 3-5
weeks