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Roues à filtres

A filter wheel is what makes monochrome imaging practical. Without one, every channel change means touching the telescope, breaking focus and losing framing; with one, the sequence runs unattended all night while you sleep. David Astro carries filter wheels in Canada in manual and motorized designs across the common filter sizes, held in our Canadian warehouse.

Wheel choice is constrained by your filter size, your camera and the back-focus you have available. Send us all three and we will specify the combination.

Filtres

SVBONY SV133 2" 5-Position Filter Wheel for Deep Sky Astrophotography
$64.79 - $64.79
$64.79
$64.79 - $64.79
$64.79

SVBONY SV133 5-Position Filter Wheel - 2"

SV-W9103B

Accommodates five 2-inch filters 2-inch barrel for telescope connection 2-inch eyepiece and camera compatibility Enables rapid filter changes duri...

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$64.79 - $64.79
$64.79
$64.79 - $64.79
$64.79
SVBONY SV226 M42 Filter Drawer
$43.00 - $43.00
$43.00
$43.00 - $43.00
$43.00

SVBONY SV226 M42 Telescope Filter Drawer

SV-W9184A
1 en stock

Magnetic drawer for rapid filter changes CNC-molded integrated body for light-leak prevention Native M42x0.75 threads for common cameras and reduc...

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$43.00 - $43.00
$43.00
$43.00 - $43.00
$43.00
SVBONY Filter Drawer for OAG | SVBONY SV226P
$45.00 - $45.00
$45.00
$45.00 - $45.00
$45.00

SVBONY SV226P Telescope Filter Drawer for Off-Axis Guider (OAG)

SV-W9184D
1 en stock

Supports both 1.25" and 2" filters in one drawer 12-point M2.5 threaded mounting for guide camera stability Includes M42, M48, and M28.5 threads f...

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$45.00 - $45.00
$45.00
$45.00 - $45.00
$45.00
Wanderer Astro SFW50/SFW50S Filter Shim for 50mm Filters thinner than 2.5mm
$18.00 - $18.00
$18.00
$18.00 - $18.00
$18.00

Wanderer Astro Filter Shim for 50mm Filters

WA-WSFW50-FS

Designed for SFW50 & SFW50S Filter Wheels Adapts 50mm Unmounted Filters Thinner than 2.5mm Ensures Accurate and Stable Filter Seating Prevents...

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$18.00 - $18.00
$18.00
$18.00 - $18.00
$18.00
Wanderer Astro Snowflake Filter Wheel - 8 x 36mm Super Low-Profile
$369.00 - $369.00
$369.00
$369.00 - $369.00
$369.00

Wanderer Astro Snowflake Filter Wheel - 8 x 36mm Super Low-Profile

WA-WSFW36S

Holds 8 x 36mm unmounted filters Ultra-low profile design, as thin as 14mm Gear-driven mechanism with anti-backlash for repeatability Dedicated 8t...

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$369.00 - $369.00
$369.00
$369.00 - $369.00
$369.00
Wanderer Astro Snowflake Filter Wheel - 8 x 50mm Super Low-Profile
$549.00 - $549.00
$549.00
$549.00 - $549.00
$549.00

Wanderer Astro Snowflake Filter Wheel - 8 x 50mm Super Low-Profile

WA-WSFW50S

Accommodates 8 x 50mm unmounted filters Ultra low-profile body for systems with limited back focus Gear-driven mechanism with anti-backlash for re...

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$549.00 - $549.00
$549.00
$549.00 - $549.00
$549.00
Wanderer Astro Snowflake Filter Wheel - 8 x 50mm/2"
$469.00 - $469.00
$469.00
$469.00 - $469.00
$469.00

Wanderer Astro Snowflake Filter Wheel - 8 x 50mm/2"

WA-WSFW50

Accommodates 8 x 50mm round (or 2" mounted) filters Ultra low-profile design for tight back focus requirements Gear-driven with anti-backlash mech...

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$469.00 - $469.00
$469.00
$469.00 - $469.00
$469.00
$388.00 - $388.00
$388.00
$388.00 - $388.00
$388.00

William Optics Elite Drawer OAG Kit

WO-M-OAG-ED
4 en stock

Integrates Off-Axis Guider and Filter Drawer 37.5 mm Optical Length Supports M48, M54, and M68 Connections Magnetic M48 Filter Holder 336 g (11.85...

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$388.00 - $388.00
$388.00
$388.00 - $388.00
$388.00
$16.00 - $16.00
$16.00
$16.00 - $16.00
$16.00

ZWO Bague d'adaptation de filtre 2" vers 1.25"

ZWO-2-1.25FL
7 en stock

Adapte les filtres montés 1.25" aux porte-filtres 2" Compatible avec les roues à filtres 2" ZWO à 5 et 7 positions S'adapte aux tiroirs à filtres ...

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$16.00 - $16.00
$16.00
$16.00 - $16.00
$16.00
$599.00 - $599.00
$599.00
$599.00 - $599.00
$599.00

ZWO EFW - Roue à filtres carrés 7 x 50mm

ZWO EFW-7x50

Accueille sept filtres carrés non montés de 50mm Conçue pour les capteurs grand format comme celui de la ZWO ASI461MM Pro Fixation directe par vis...

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$599.00 - $599.00
$599.00
$599.00 - $599.00
$599.00
$239.00 - $239.00
$239.00
$239.00 - $239.00
$239.00

ZWO EFW - 8 x 1.25" ou 31mm

ZWO-EFW-8x1.25
1 restant!

Pour filtres 1.25" ou 31mm Installation facile sur le télescope et la caméra Filtres faciles à in...

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$239.00 - $239.00
$239.00
$239.00 - $239.00
$239.00
$199.00 - $199.00
$199.00
$199.00 - $199.00
$199.00

ZWO Roue à filtres électronique EFW Gen2 - 5 x 1.25"

ZWO-EFW-5x1.25-25
3 en stock

5 positions de filtres pour filtres 1.25" ou 31mm Ajoute 20 mm de backfocus au train optique Alimentation et commande par USB-C Boîtier repensé po...

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$199.00 - $199.00
$199.00
$199.00 - $199.00
$199.00
$299.00 - $299.00
$299.00
$299.00 - $299.00
$299.00

ZWO Roue à filtres électronique EFW Gen2 - 5 x 2"

ZWO-EFW-5x2-25
4 en stock

Accueille 5 filtres montés 2" ou non montés 50mm N'occupe que 20 mm de backfocus dans le train optique Moteur pas à pas pour une sélection des fil...

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$299.00 - $299.00
$299.00
$299.00 - $299.00
$299.00
$399.00 - $399.00
$399.00
$399.00 - $399.00
$399.00

ZWO Roue à filtres électronique EFW Gen2 - 7 x 2"

ZWO-EFW-7x2-25
1 en stock

Accepte sept filtres 2" montés ou 50mm non montés Ajoute 20 mm de backfocus au train optique Moteur pas à pas pour une sélection précise et silenc...

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$399.00 - $399.00
$399.00
$399.00 - $399.00
$399.00
$299.00 - $299.00
$299.00
$299.00 - $299.00
$299.00

ZWO Roue à filtres électronique EFW Gen2 - 7 x 36mm

ZWO-EFW-7x36-25
2 en stock

Accueille sept filtres non montés de 36mm N'ajoute que 20mm de backfocus au train optique Carrousel 7 positions pour jeux LRGB, à bande étroite ou...

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$299.00 - $299.00
$299.00
$299.00 - $299.00
$299.00
$299.00 - $299.00
$299.00
$299.00 - $299.00
$299.00

ZWO Roue à filtres électronique EFW Gen2 - 8 x 1.25"

ZWO-EFW-8x1.25-25
5 en stock

Accueille 8 filtres montés 1.25" ou non montés 31mm Ajoute 20 mm de backfocus au train optique Moteur pas à pas alimenté par USB pour une sélectio...

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$299.00 - $299.00
$299.00
$299.00 - $299.00
$299.00
$99.00 - $99.00
$99.00
$99.00 - $99.00
$99.00

ZWO Tiroir à filtres pour objectif EOS

ZWO-FD-EOS
10 en stock

Relie les objectifs Canon EOS aux caméras ZWO ASI Accepte les filtres montés 2" standards Porte-filtre magnétique pour des changements de filtres ...

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$99.00 - $99.00
$99.00
$99.00 - $99.00
$99.00
$99.00 - $99.00
$99.00
$99.00 - $99.00
$99.00

ZWO Tiroir à filtres pour objectif Nikon

ZWO-FD-NIKON
10 en stock

Adapte les objectifs Nikon aux caméras refroidies ZWO ASI Accepte les filtres montés standard de 2" (filetage M48x0.75) Profil ultra-mince de 29 m...

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$99.00 - $99.00
$99.00
$99.00 - $99.00
$99.00
$79.00 - $79.00
$79.00
$79.00 - $79.00
$79.00

ZWO Tiroir à filtres V2 - M42

ZWO-FD-M42-II
46 en stock

Accepte les filtres montés 2" standard Ajoute exactement 21mm au chemin optique Filetage mâle M42 x 0.75 côté caméra Filetage femelle M48 x 0.75 c...

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$79.00 - $79.00
$79.00
$79.00 - $79.00
$79.00
$79.00 - $79.00
$79.00
$79.00 - $79.00
$79.00

ZWO Tiroir à filtres V2 - M54

ZWO-FD-M54-II
20 en stock

Se raccorde aux accessoires à filetage M54 x 0.75 Accepte les filtres montés 2" standard Porte-filtre magnétique pour des changements de filtre ra...

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$79.00 - $79.00
$79.00
$79.00 - $79.00
$79.00
$35.00 - $35.00
$35.00
$35.00 - $35.00
$35.00

ZWO Porte-filtre V2

ZWO-F-HLDR
27 en stock

Accueille les filtres montés standard de 2" (50.8mm) Filetage intérieur M48x0.75 pour une fixation sûre des filtres Permet de préparer plusieurs f...

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$35.00 - $35.00
$35.00
$35.00 - $35.00
$35.00
$12.00 - $15.00
$12.00 - $15.00
$12.00 - $15.00
$12.00

ZWO Masques de filtre

Options available
5 variants in stock

Fixe solidement les filtres non montés de 36mm Compatible avec toutes les EFW ZWO 36mm à 7 positions Vis de fixation M2 incluses Empêche les fuite...

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$12.00 - $15.00
$12.00 - $15.00
$12.00 - $15.00
$12.00
$16.00 - $16.00
$16.00
$16.00 - $16.00
$16.00

ZWO Adaptateur de filtre T2-1.25"

ZWO-T2-1.25-3
8 en stock

Relie les caméras à filetage M42 (T2) aux filtres 1.25" N'ajoute que 1 mm de longueur optique au train optique Préserve le backfocus critique des ...

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$16.00 - $16.00
$16.00
$16.00 - $16.00
$16.00

Choosing a Filter Wheel

Three specifications determine whether a wheel works in your system: filter size and count, optical thickness, and how it integrates with your camera and guider.

  • Filter size and position count: More positions means fewer swaps, but a larger wheel diameter and often greater thickness. Five to seven positions covers LRGB plus narrowband for most imagers.
  • Optical thickness: The wheel consumes back-focus, and this must be included in your corrector spacing calculation. Slim designs exist specifically to conserve it.
  • Mounted versus unmounted filters: Wheels are built for one or the other. Unmounted square filters maximize clear aperture for large sensors but need a compatible carrier.
  • Motorized versus manual: Motorized wheels are essential for unattended sequences. Manual wheels are cheaper and adequate if you are present and refocusing anyway.
  • Off-axis guider integration: Many wheels accept an integrated off-axis guider, keeping the train short and the guide star picked off ahead of the filters.
  • Vignetting geometry: Filter size must suit sensor diagonal and the distance from filter to sensor. Too small and the corners darken regardless of the optics.

Why Choose David Astro for Filter Wheels

A filter wheel is a back-focus decision as much as a convenience one.

  • Thickness included in the calculation: We provide a complete spacing list with the wheel accounted for, so your corrector still lands on its design distance.
  • Filter size verified against your sensor: We calculate the size needed to avoid vignetting rather than assuming the nominal match is adequate.
  • Off-axis guider planned together: If you will need one at your focal length, we specify it with the wheel so the geometry works out the first time.
  • Authorized dealer: Genuine wheels with manufacturer warranty, in Canadian stock.
  • Ships from Canada: No duties or brokerage fees for Canadian orders.

Filter Wheels in Canada — Frequently Asked Questions

How many filter positions do I need?
Five covers LRGB plus one narrowband. Seven covers LRGB plus Ha, OIII and SII, which is the complete common set and avoids ever swapping filters by hand.
What filter size should I use?
It depends on sensor diagonal and how far the filter sits from the sensor. 36 mm typically suits APS-C in a standard wheel; full frame usually needs 50 mm square or unmounted 2 inch.
Does the wheel affect my back-focus?
Yes, significantly — often 20 mm or more of the typical 55 mm budget. It must be included in the calculation along with the camera and any off-axis guider.
Manual or motorized?
Motorized if you run unattended sequences, which is most of the point of monochrome imaging. Manual is a reasonable economy only if you are at the telescope throughout the session.

Building a mono imaging train?

Send us your camera, filters and corrector and we will specify the wheel and spacing. Full warranty, shipped from Canada.