3. Flatteners for other telescopes

1. SFFR-70-2 .8X Reducer for 70 mm f-6 refractors

  Focal Reducer/Field Flattener for SV70T 70 mm f-6 triplet apochromat This reducer/flattener is optimized for our 70 mm triplet lens. The flattener threads into the Stellarvue 2.5” A version focuser. It will also slide into a 2”...

2. SFFR80-2 .8X Reducer for 80 mm f-7 refractors

Focal Reducer/Field Flattener for an 80 mm f-7 refractor This reducer/flattener either slides into a standard 2" adapter or threads into the former Stellarvue Access 2.5” focuser. The 0.8X focal reduction converts the 80mm f-7 to f-5.6...

3. Reducer/Flattener for SV102T / SVR102T / Access 102

  Focal Reducer/Field Flattener for SV102-ACCESS This reducer/flattener is optimized for a 102 mm f-7 refractor. So it will work with our Sv102 Access telescopes. The flattener threads into the 2.5” focusers (FSV25/FSV25B). It will also work...

3. SFFR90-2 Reducer for 90mm f-7 refractors

 Focal Reducer/Field Flattener for our former 90mm f-7 Apochromats This reducer/flattener is not for the latest SVX90T which is f-6. This is optimized for our former SVR90T's. The flattener threads inserts into a standard 2" adapter. The 0.8X focal...

4. SFFR102-2 Reducer for 102mm f/7 Refractors

Focal Reducer/Field Flattener for f-7 refractors  This reducer/flattener is optimized for a 102 mm f-7 objective and it will work with other refractors of similar focal length. The flattener slips into the 2" focuser. The 0.8X focal reduction...

5. SFFR115-2 Reducer for 115mm f-7 refractors

  Focal Reducer/Field Flattener for former model SV115T and other 115 f-7 refractors The flattener slips into the 2" focuser. The 0.8X focal reduction converts the 115 mm f-7 to f-5.6. This reducer/flattener has a standard 48 mm filter thread...

Field Flattener for 80mm f-6 with 2" focuser

 Photographic field flattener for 80mm f-6 refractors with 2" focusers: This older version 1X field flattener is designed to improve performance with 80 mm/480 mm focal length optical systems. This flattener is designed for cameras using APS-c...

Field Flattener for refractors with 2" Focusers - SFF7-21

This is our older modular flattener designed for Stellarvue telescopes that have a 2" focuser and operate at around 700 mm focal length. If your focal length is shorter additional extension rings may be needed to get optimal results. The lens inserts...