Johnson/Bessel UBVRI Filters

Andover Corporation is now offering UBVRI filters as standard items. These filters are used to filter out and measure specific bands of light which are emitted by astronomical objects. 

Two types are offered: the Johnson/Bessel and the Kron/Cousins. The Johnson/Bessell type is better suited for use with a photomultiplier tube whereas the Kron/Cousins type is better suited for use with a Silicon CCD. Both filter sets work very well but it is important to establish the type of measuring system you are going to utilize before purchasing any sets.

Both filter types utilize the same U, B & V filters. The R & I filters for each type are different; they are better matched to the response of the detector being used.

Refocusing is always a problem when changing filters. Andover has minimized this problem by grinding and polishing all filters to very precisely controlled thicknesses.

The UBVRI filters are available in a range of standard and custom sizes. With the exception of two sizes which are mounted in threaded rings, all other sizes are unmounted. Contact Andover Technical Sales if you have any questions or require a quotation for a custom size or mounting.

DESCRIPTION PART NO. 1-5 pcs. >5 pcs. QTY IN STOCK QTY
+ B Filternm CWL, 100nm Bandwidth, 25.0 Diameter JOHN-B-25 $204 $163 17
Description Johnson B type filter/25mm dia.
QtyPrice
1-5 $204
6+ $163
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ B Filternm CWL, 100nm Bandwidth, 31.0 Diameter JOHN-B-31M $302 $242 0
Description Johnson B type filter/28mm dia. (mounted)
QtyPrice
1-5 $302
6+ $242
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ B Filternm CWL, 100nm Bandwidth, 50.0 Diameter JOHN-B-50 $631 $505 0
Description Johnson B type filter/50mm dia.
QtyPrice
1-5 $631
6+ $505
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ B Filternm CWL, 100nm Bandwidth, 50.0 Diameter JOHN-B-50M $664 $531 0
Description Johnson B type filter/50mm dia. (mounted)
QtyPrice
1-5 $664
6+ $531
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ B Filternm CWL, 100nm Bandwidth, 50.0 x 50.0 Diameter JOHN-B-50S $631 $505 5
Description Johnson B type filter/50mm x 50mm
QtyPrice
1-5 $631
6+ $505
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ I Filternm CWL, 300nm Bandwidth, 25.0 Diameter JOHN-I-25 $204 $163 2
Description Johnson I type filter/25mm dia.
QtyPrice
1-5 $204
6+ $163
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ I Filternm CWL, 300nm Bandwidth, 31 Diameter JOHN-I-31M $302 $242 0
Description Johnson I type filter/28mm dia. (mounted)
QtyPrice
1-5 $302
6+ $242
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ I Filternm CWL, 300nm Bandwidth, 50 Diameter JOHN-I-50 $631 $505 4
Description Johnson I type filter/50mm dia.
QtyPrice
1-5 $631
6+ $505
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ I Filternm CWL, 300nm Bandwidth, 50 Diameter JOHN-I-50M $664 $531 0
Description Johnson I type filter/50mm dia. (mounted)
QtyPrice
1-5 $664
6+ $531
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ I Filternm CWL, 300nm Bandwidth, 50 X 50 Diameter JOHN-I-50S $631 $505 0
Description Johnson I type filter/50mm x 50mm
QtyPrice
1-5 $631
6+ $505
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ R Filternm CWL, 120nm Bandwidth, 25.0 Diameter JOHN-R-25 $204 $163 6
Description Johnson R type filer/25mm dia.
QtyPrice
1-5 $204
6+ $163
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ R Filternm CWL, 120nm Bandwidth, 31 Diameter JOHN-R-31M $302 $242 1
Description Johnson R type filter/28mm dia. (mounted)
QtyPrice
1-5 $302
6+ $242
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ R Filternm CWL, 120nm Bandwidth, 50.0 Diameter JOHN-R-50 $631 $505 4
Description Johnson R type filter/50mm dia.
QtyPrice
1-5 $631
6+ $505
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ R Filternm CWL, 120nm Bandwidth, 50.0 Diameter JOHN-R-50M $664 $531 0
Description Johnson R type filter/50mm dia. (mounted)
QtyPrice
1-5 $664
6+ $531
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ R Filternm CWL, 120nm Bandwidth, 50.0 x 50.0 Diameter JOHN-R-50S $631 $505 0
Description Johnson R type filter/50mm x 50mm
QtyPrice
1-5 $631
6+ $505
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ U Filternm CWL, 60nm Bandwidth, 25.0 Diameter JOHN-U-25 $204 $163 18
Description Johnson U type filter/25mm dia.
QtyPrice
1-5 $204
6+ $163
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ U Filternm CWL, 60nm Bandwidth, 31 Diameter JOHN-U-31M $302 $242 0
Description Johnson U type filter/28mm dia. (mounted)
QtyPrice
1-5 $302
6+ $242
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ U Filternm CWL, 60nm Bandwidth, 50.0 Diameter JOHN-U-50 $631 $505 0
Description Johnson U type filter/50mm dia.
QtyPrice
1-5 $631
6+ $505
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ U Filternm CWL, 60nm Bandwidth, 50.0 Diameter JOHN-U-50M $664 $531 0
Description Johnson U type filter/50mm dia. (mounted)
QtyPrice
1-5 $664
6+ $531
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ U Filternm CWL, 60nm Bandwidth, 50 X 50 Diameter JOHN-U-50S $631 $505 6
Description Johnson U type filter/50mm x 50mm
QtyPrice
1-5 $631
6+ $505
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ V Filternm CWL, 90nm Bandwidth, 25.0 Diameter JOHN-V-25 $204 $163 16
Description Johnson V type filter/25mm dia.
QtyPrice
1-5 $204
6+ $163
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ V Filternm CWL, 90nm Bandwidth, 31.0 Diameter JOHN-V-31M $302 $242 1
Description Johnson V type filter/28mm dia. (mounted)
QtyPrice
1-5 $302
6+ $242
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.
+ V Filternm CWL, 90nm Bandwidth, 50.0 Diameter JOHN-V-50 $631 $505 0
Description Johnson V type filter/50mm dia.
QtyPrice
1-5 $631
6+ $505
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ V Filternm CWL, 90nm Bandwidth, 50.0 Diameter JOHN-V-50M $664 $531 0
Description Johnson V type filter/50mm dia. (mounted)
QtyPrice
1-5 $664
6+ $531
Estimated delivery: approximately 1 week.
Note: Always free ground shipping on all domestic orders.
+ V Filternm CWL, 90nm Bandwidth, 50.0 x 50.0 Diameter JOHN-V-50S $631 $505 12
Description Johnson V type filter/ 50mm x 50mm
QtyPrice
1-5 $631
6+ $505
Estimated delivery: 1-2 days.
Note: Always free ground shipping on all domestic orders.