Flattener / Reducer / Correctors
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Flattener / Reducer / Correctors
Corrective optics are a very important component, especially in astrophotography. They turn almost every refractor, Newtonian or other telescope into an astrograph. They flatten the image field, shorten the focal length or correct system-related image errors.
The corrector fits to the 2" receptacle of the focuser, it corrects the image field for astrophotography
- Suitable for refractor telescopes up to 102 mm aperture or smaller (ED, apo, achromat... )
- Connection telescope side 2" barrel with filter thread
- Connection camera side M48x0.75 thread
- Working distance from M48 thread to camera sensor is 55 mm
- No shortening factor, the focal length of the refractor is not changed
169.00 €
Estimated delivery time : 1-4 days
The corrector fits to the 2" receptacle of the focuser, it corrects the image field for astrophotography
- Suitable for refractor telescopes up to 102 mm aperture or smaller (ED, apo, achromat... )
- Connection telescope side 2" barrel with filter thread
- Connection camera side T2 thread
- Working distance from T2 thread to camera sensor is 55 mm
- No shortening factor, the focal length of the refractor is not changed
169.00 €
Estimated delivery time : 1-4 days
TS Glass Path Corrector for Binoviewers 1 1/4".
64.00 €
Estimated delivery time : 1-4 days
The 4" corrector and reducer is designed for the large 180mm f/7 Triplet APO and allows astrophotography with full frame cameras at the highest level.
- Improves the focal ratio from f/7 to f/5.6 and reduces the focal length of the apo to 1008 mm
- Full illumination and correction up to full frame
- Working distance is 55 mm from the M48 connection thread
- The corrector is screwed to the focuser of the apo
1341.00 €
Estimated delivery time : 1-4 days
This field flattener is designed to work with the Altair 115ED Triplet Wave Series Refractor with M63 2.5" CNC Focuser. It has an M48 rear thread adaptor for connecting your DSLR or CCD camera.
279.00 €
Estimated delivery time : 2-4 weeks
This reducer - flattener is designed to work with the Altair Astro Wave Series 115mm EDT-X FPL53 102mm F7 Super ED Triplet APO.
It consists of two components:
- The flattener body containing the optics, with M92 male outer thread on the telescope side and M72 female inner thread on the camera side
- An M72 to M48 adaptor-spacer with M72 male outer thread on the flattener side and M48 male outer thread on the camera side. The adaptor has a 21.62mm optical length, to give 55mm sensor to flange distance.
449.00 €
Estimated delivery time : 2-4 weeks
This field flattener is designed to work with the Altair Astro Starwave Series 115EDT Triplet APO.
239.00 €
Estimated delivery time : 2-4 weeks
Altair GPCAM & Hypercam 0.5x Reducer - Auto Guiding EAA Video Astronomy Solar
32.00 €
Estimated delivery time : 1-4 weeks
Altair Starwave v3 0.8x Reduces exposure time and gives a larger, flatter field with various refractors.
209.00 €
Estimated delivery time : 2-4 weeks
Our totally new comacorrecting 1 1/4" ED-Barlowlens - calculated from Gerd Güring - Germany.
189.00 € 175.00 €
Estimated delivery time : 1-2 days
Our totally new comacorrecting 1 1/4" ED-Barlow Element - calculated from Gerd Güring - Germany.
125.00 € 115.00 €
Estimated delivery time : 1-4 days
Our unique comacorrecting 1 1/4" ED Double Barlow - calculated by Gerd Güring - Germany.
295.00 € 265.00 €
Estimated delivery time : 1-2 weeks
This adapter allows to install the M63 APM-Riccardi Apo reducer inside the focuser barrel of different 3" focuser
57.00 €
Estimated delivery time : 1-4 days
The all new APM-Riccardi Universal Apo Flattner 1.0x Model 1 for Apo Telescopes.
495.00 € 445.00 €
Estimated delivery time : 1-2 days
The all new APM-Riccardi Universal Apo Flattner 1.0x Model 2 for Apo Telescopes.
495.00 € 445.00 €
Estimated delivery time : 1-2 days
This reducer, when used with the 65PHQ astrograph, can effectively shorten the exposure time and significantly increase the field of view.
- specially designed for the 65PHQ
- reduces the focal length by 0.75x
- four-lens system
- camera-side threads M54 and M48
- 65 or 55 mm backfocus
389.00 €
Estimated delivery time : 1-4 days
This reducer, connected with the astrographs, can effectively shorten the exposure time and dramatically increase your field of view.
Designed for 107PHQ, 130PHQ and 151PHQ Reduces focal length by 0.7x Triplet design with ED glass Plugs into focuser Connection threads M68x1 male, M54x0.75 male, M48x0.75 male 55 mm backfocus from M48 thread
565.00 €
Estimated delivery time : 1-4 days
The Askar 0,8x Reducer - Corrector for the 185mm f7 Triplet APO turns the 185 mm APO into a fast Astrograph.
- designed for the Askar 185APO
- brings the focal ratio down to f5.6
- suitable for full frame cameras
489.00 €
Estimated delivery time : 1-4 days
The Askar 1.0x corrector for the 185mm f7 Triplet APO provides a very good image quality across the entire field of view.
- developed for the Askar 185APO
- provides very good image quality across the entire field of view
- suitable for full-frame cameras
579.00 €
Estimated delivery time : 2-3 days
The ASKAR full-frame 0.7x focal length reducer improves the FRA400´s and FRA500´s focal ratio from f/5.6 to f/3.9, halving the exposure time
299.00 €
Estimated delivery time : 1-4 days
The ASKAR full frame 0.7x focal length reducer improves the FRA600´s focal ratio from f/5.6 to f/3.9, halving the exposure time
509.00 €
Estimated delivery time : 1-4 days
Baader Hyperion 2.25x Barlow lens w/ 1.25" and T2 connection
133.00 €
Estimated delivery time : 1-4 days
Fieldflattener for ED Apos by Explore Scientific.
145.00 €
Estimated delivery time : 1-4 days
Fieldflattener for ED Apos by Explore Scientific.
145.00 €
Estimated delivery time : 1-4 days
3" 0.7x Reducer/corrector
- Reducer and Field Flattener
- Reduces the focal length by 0.7x
- Flattens the field for astrophotography
- Developed for ED127 and ED152 APO telescopes
- Free aperture of 65mm for large sensors
- Works very well with most coma free systems: apochromats, RCs, Meade ACF
419.00 €
Estimated delivery time : 3-4 days
HR Coma Corrector 2" by Explore Scientific.
349.00 €
Estimated delivery time : 3-4 days
Field flattener for Explore Scientific ED80 and ED102 APOCHROMATS, correcting field curvature for up to full-frame camera sensors
179.00 €
Estimated delivery time : 3-4 days
The Atmospheric Dispersion Corrector (ADC) Compact corrects the effects on the telescope image caused by the atmospheric dispersion to maintain the full optical performance of the telescope.
4899.00 €
Estimated delivery time : on request
Enlarges and flattens the field of view of the LUNT LS80MT, LS100MT & LS130MT multipurpose
599.00 €
Estimated delivery time : 1-4 days
New ! Adjustable Flat73A for William Optics f/5 to f/7 telescopes
- Universally applicable for telescopes between f/5 and f/7
- Focusing travel is adjustable
- M63 thread on telescope side
- M48 thread on camera side
- Integrated M48 filter thread
309.00 €
Estimated delivery time : on request
Discover the ultimate accessory for your astrophotography experience - the William Optics Flattener 68III!
- Optimized for full-frame photography
- Variable adjustable distance to chip
- No focal length change
- M48 filter thread
749.00 €
Estimated delivery time : 1 week
Omegon Pro Reducer 0.74x for 140/910 Triplet APO
649.00 €
Estimated delivery time : 2-3 months
Suitable reducer for the Omegon 61mm ED APO
339.00 €
Estimated delivery time : 1-4 days
Suitable Reducer for the Omegon 76mm APO Refractor
399.00 €
Estimated delivery time : 2-5 months
Optec Adapter to M48 for the Flattener and Reducer.
42.00 €
Estimated delivery time : 1-4 days
Optec NextGen Reducer for Telescopes with Field Correction 0.7x with 18 mm field.
452.00 €
Estimated delivery time : 1-4 days
Optec Lepus HD Telecompressor for Celestron Edge HD 11.
390.00 €
Estimated delivery time : 1-4 days
Optec Lepus HD Telecompressor for Celestron Edge HD 14.
404.00 €
Estimated delivery time : 1-4 weeks
Optec Lepus HD Telecompressor for Celestron Edge HD 8.
398.00 €
Estimated delivery time : 1-4 days
Optec Lepus HD Telecompressor for Celestron Edge HD 9.25.
382.00 €
Estimated delivery time : 1-4 days
Optec Lepus Telecompressor for Meade ACF.
309.00 €
Estimated delivery time : 1-4 days
The ADC Mark II corrects the dispersive effects of earth´s atmosphere. You will get sharper images of planets and moon.
395.00 €
Estimated delivery time : 2-5 months (as from Availability)
Availability acc. to manufacturer :
May 17 2025
May 17 2025
This reducer / field flattener is designed to work with the Altair Astro Wave 150EDF refractors with 3.7" focuser. It has an M48 rear thread adaptor for connecting your DSLR or CCD camera.
459.00 €
Estimated delivery time : 2-4 weeks
Skywatcher 0.85X FOCAL REDUCER/CORRECTOR FOR EVOSTAR-150ED DS-PRO
299.00 € 276.58 €
Estimated delivery time : 1-4 days
The Skywatcher 0,85x Reducer and Flattener for Evostar ED 100/900 increases the field of view and photographic speed, and corrects for field curvature
299.00 € 276.58 €
Estimated delivery time : 1-4 days
The Skywatcher 0,85x Reducer and Flattener for Evostar ED 120/900 increases the field of view and photographic speed, and corrects for field curvature
299.00 € 276.58 €
Estimated delivery time : 1-4 days
The Skywatcher 0,85x Reducer and Flattener for Evostar ED 80/600 increases the field of view and photographic speed, and corrects for field curvature
299.00 € 276.58 €
Estimated delivery time : 1-4 days
2" coma corrector delivers stunning wide-field views with pinpoint stars to the edge of the field
225.00 € 208.12 €
Estimated delivery time : 1-4 days
