Field Reducers and Flatteners at BuyTelescopes.com

Baader Planetarium Reducer 2"/1.25" includes T-2 thread, permits you convert your 2" focuser for use with 1¼” eyepieces and accessories.

$49.00

Threaded adapter for Stellarvue SFF7-21

Convert your SFF7-21 into a threaded field flattener that works with the 3” Feather Touch focuser.

$69.00

Stellarvue SSF3-SVA threaded adapter for SFF7-21

Convert your SFF7-21 into a threaded field flattener that works with the new SV 3” dual speed focuser.

$69.00

Optec (CCD Photo Accessories) WideField-FLI 0.5X Telecompressor Lens

Optec (CCD Photographic Accessories) WideField-FLI 0.5X Telecompressor Lens.
Special WideField f/5 telecompressor designed to fit directly into the FLI camera faceplate using a 2" 24tpi thread.

$95.00

Meade Series 4000 f/6.3 Focal Reducer

Threaded on to the telescope’s rear cell in front of the #62 T-Adapter or Off-Axis Guider, and the camera body, the f/6.3 Focal Reducer reduces the main telescope’s focal ratio by a factor of 0.63 (e.g. from f/10 to f/6.3), thereby reducing photographic exposure times by about 50%.

$129.00

Astro-Physics CCD Telecompressor (.67)

Astro-Physics CCD Telecompressor for SBIG CCD Cameras (.67).
Clear aperture is 1.75". Compression ratio is 0.67x with SBIG ST7/8/10 + Color Filter Wheel installed, 0.75x without the Color Filter Wheel. Suitable for telescopes with focal lengths of f7 to f18 including Maksutov-Cassegrains, Schmidt-Cassegrains, Ritchey-Cretiens, and refractors.

$148.00

Meade Series 4000 f/3.3 CCD Focal Reducer

Series 4000 f/3.3 CCD Focal Reducer

$149.00

Custom adapter for focuser and camera for Riccardi - Reducer / Flatteners

Custom machined adapter to fit focuser and camera for a Riccardi - Reducer / Flattener.

$225.00

Optec (CCD Photo Accessories) NextGEN MAXfield 0.33X Telecompressor Lens

Optic NextGEN MAXfield 0.33X Telecompressor Lens.

$245.00

Borg DX 0.85X Focal Reducer for Digital Imagers

DX 0.85X Focal Reducer for Digital Imagers

$263.00

Photographic field flattener for the Stellarvuef-7 refractors

$Picture of Photographic field flattener for the Stellarvuef-7 refractors$

This is the most popular modular flattener designed for all Stellarvue telescopes that operate at a certain focal ratio. The lens inserts into the 2” focuser and uses a tapered insert tube to more accurately seat the flattener in the focuser.

$265.00

Photographic field flattener for the Stellarvue f6 refractors

$Picture of Photographic field flattener for the Stellarvue f6 refractors$

This field flattener is designed to work with the Stellarvue f-6 optical systems. This includes the Stellarvue SV70ED, SV80ST2 and SV80S.

$265.00

Optec (CCD Photo Accessories) NextGEN WideField 0.5X Telecompressor Lens

The Optec NGW (Next Generation WideField) telecompressor increases the effective speed of the Meade and Celestron Schmidt-Cassegrain telescopes from f/10 to f/5. This 1/2 times reduction in focal length allows for 4 times greater field area and 1/4 reduction in exposure time for extended surface objects such as bright nebulae.

$275.00

TeleVue 0.8x Reducer for NP and NPis Series Telescopes

0.8x reducer for NP and NPis series telescopes. For up to 43mm diagonal formats, it's constructed to fit both 2" focuser NP scopes (RAD-1074 required) and the threaded NPis accessories on the input end. Requires CWT-1070, STL-1071 or TRG-1072 to connect to camera.

$288.99

TeleVue 0.8X Reducer/Flattener for Pronto/TV-76/TV-85

0.8X Reducer/Flattener for Pronto, TV-76 and TV-85 refractors.

$293.99

Stellarvue SFF7-3SV field flattener

Dedicated APS sized f-7 field flattener for use with the new Stellarvue 3” dual speed focuser.

$295.00

TeleVue 0.8x Reducer / Flattener for TV-102 Telescopes

0.8x reducer / flattener for TV-102 telescopes. For up to 43mm diagonal formats, it's constructed to fit both the standard 2" focuser of the TV-102 and the threaded TV-102iis accessories on the input end. Requires CWT-1070, STL-1071 or TRG-1072 to connect to camera.

$313.99

Large Chip flattener for SV25 Focuser

This flattener is made for the Stellarvue f-7 refractors. It threads to the rear of the new Stellarvue 2.5” focuser. A DSLR camera with t-ring threads to it.

$319.00

Large Chip flattener for SVF30 Focuser

This flattener is made for the Stellarvue f-7 refractors. It threads to the rear of the new Stellarvue 3” focuser.

$319.00

Takahashi TOA 35 Flattener for 2.7" & 4.0" Focusers

Takahashi Flattener for the TOA 130/150 with 2.7" and 4.0" focusers, TSA-102/120, FC and FS series refractors. 50MM image circle.

$509.99