KRON/COUSINS 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.

BENEFITS 
  • Options for professionals and amateurs alike
  • Ideal for photometric calibration
  • Isolate and measure large specific bands of light emitted by astrological objects

COMMON APPLICATIONS

  • Astronomy

DESCRIPTION
PART NO.
1 - 5 pcs.
> 5 pcs.
QTY In Stock
Buy
Kron/Cousins B type filter/25mm dia.
KRON-B-25
$234.00
$187.00
2
Filter TypeKron/Cousins B Filter Filter
Bandwidth100nm nom
Minimum Transmission55%
Size+0.00/-0.25mm
Thickness5.0 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$234.00
> 5 pcs.$187.00

Estimated Delivery: 2-3 Days
Kron/Cousins B type filter/28mm dia. (mounted)
KRON-B-31M
$347.00
$278.00
0
Filter TypeKron/Cousins B Filter Filter
Bandwidth100nm nom
Minimum Transmission55%
Size+0.00/-0.25mm
Thickness10 +nom/-nom mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$347.00
> 5 pcs.$278.00

Estimated Delivery: 2-3 Days
Kron/Cousins B type filter/50mm dia.
KRON-B-50
$723.00
$578.00
0
Filter TypeKron/Cousins B Filter Filter
Bandwidth100nm nom
Minimum Transmission> 55%
Size+0.0/-0.25mm
Thickness5.0 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$723.00
> 5 pcs.$578.00

Estimated Delivery: 2-3 Days
Kron/Cousins B type filter/50mm dia. (mounted)
KRON-B-50M
$762.00
$610.00
0
Filter TypeKron/Cousins B Filter Filter
Bandwidth100nm nom
Minimum Transmission> 55%
Size+0.0/-0.25mm
Thickness10 +nom/-nom mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$762.00
> 5 pcs.$610.00

Estimated Delivery: 2-3 Days
Kron/Cousins B type filter/50mm x 50mm
KRON-B-50S
$723.00
$578.00
0
Filter TypeKron/Cousins B Filter Filter
Bandwidth100nm nom
Minimum Transmission55%
Size+0.0/-0.25mm
Thickness5.0 +0.10/-0.10 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$723.00
> 5 pcs.$578.00

Estimated Delivery: 2-3 Days
Kron/Cousins I type filter/25mm dia.
KRON-I-25
$234.00
$187.00
2
Filter TypeKron/Cousins I Filter Filter
Bandwidth175nm nom
Minimum Transmission70%
Size+0.00/-0.25mm
Thickness5.0 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$234.00
> 5 pcs.$187.00

Estimated Delivery: 2-3 Days
Kron/Cousins I type filter/28mm dia. (mounted)
KRON-I-31M
$347.00
$278.00
0
Filter TypeKron/Cousins I Filter Filter
Bandwidth175nm nom
Minimum Transmission70%
Size+0.00/-0.25mm
Thickness10 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$347.00
> 5 pcs.$278.00

Estimated Delivery: 2-3 Days
Kron/Cousins I type filter/50mm dia.
KRON-I-50
$723.00
$578.00
0
Filter TypeKron/Cousins I Filter Filter
Bandwidth175nm nom
Minimum Transmission> 70%
Size+0.0/-0.25mm
Thickness5.0 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$723.00
> 5 pcs.$578.00

Estimated Delivery: 2-3 Days
Kron/Cousins I type filter/50mm dia. (mounted)
KRON-I-50M
$762.00
$610.00
0
Filter TypeKron/Cousins I Filter Filter
Bandwidth175nm nom
Minimum Transmission> 70%
Size+0/-0.25mm
Thickness10 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$762.00
> 5 pcs.$610.00

Estimated Delivery: 2-3 Days
Kron/Cousins I type filter/50mm x 50mm
KRON-I-50S
$723.00
$578.00
2
Filter TypeKron/Cousins I Filter Filter
Bandwidth175nm nom
Minimum Transmission70%
Size+0.0/-0.25mm
Thickness5.0 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$723.00
> 5 pcs.$578.00

Estimated Delivery: 2-3 Days
Kron/Cousins R type filter/25mm dia.
KRON-R-25
$234.00
$187.00
8
Filter TypeKron/Cousins R Filter Filter
Bandwidth250nm nom
Minimum Transmission70%
Size+0.00/-0.25mm
Thickness5.0 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$234.00
> 5 pcs.$187.00

Estimated Delivery: 2-3 Days
Kron/Cousins R type filter/28mm dia. (mounted)
KRON-R-31M
$347.00
$278.00
0
Filter TypeKron/Cousins R Filter Filter
Bandwidth250nm nom
Minimum Transmission70%
Size+0.00/-0.25mm
Thickness10 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$347.00
> 5 pcs.$278.00

Estimated Delivery: 2-3 Days
Kron/Cousins R type filter/50mm dia.
KRON-R-50
$723.00
$578.00
3
Filter TypeKron/Cousins R Filter Filter
Bandwidth250nm nom
Minimum Transmission70%
Size+0.0/-0.25mm
Thickness5.0 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$723.00
> 5 pcs.$578.00

Estimated Delivery: 2-3 Days
Kron/Cousins R type filter/50mm dia. (mounted)
KRON-R-50M
$762.00
$610.00
0
Filter TypeKron/Cousins R Filter Filter
Bandwidth250nm nom
Minimum Transmission70%
Size+0.0/-0.25mm
Thickness10 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$762.00
> 5 pcs.$610.00

Estimated Delivery: 2-3 Days
Kron/Cousins R type filter/50mm x 50mm
KRON-R-50S
$723.00
$578.00
0
Filter TypeKron/Cousins R Filter Filter
Bandwidth250nm nom
Minimum Transmission70%
Size+0.0/-0.25mm
Thickness5.0 +0.10/-0.10 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$723.00
> 5 pcs.$578.00

Estimated Delivery: 2-3 Days
Kron/Cousins U type filter/25mm dia.
KRON-U-25
$234.00
$187.00
11
Filter TypeKron/Cousins U Filter Filter
Bandwidth60nm nom
Minimum Transmission50%
Size+0.00/-0.25mm
Thickness5.0 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$234.00
> 5 pcs.$187.00

Estimated Delivery: 2-3 Days
Kron/Cousins U type filter/28mm dia. (mounted)
KRON-U-31M
$347.00
$278.00
0
Filter TypeKron/Cousins U Filter Filter
Bandwidth60nm nom
Minimum Transmission50%
Size+0.00/-0.25mm
Thickness10 +nom/-nom mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$347.00
> 5 pcs.$278.00

Estimated Delivery: 2-3 Days
Kron/Cousins U type filter/50mm dia.
KRON-U-50
$723.00
$578.00
5
Filter TypeKron/Cousins U Filter Filter
Bandwidth60nm nom
Minimum Transmission> 50%
Size+0.00/-0.25mm
Thickness5.0 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$723.00
> 5 pcs.$578.00

Estimated Delivery: 2-3 Days
Kron/Cousins U type filter/50mm dia. (mounted)
KRON-U-50M
$762.00
$610.00
0
Filter TypeKron/Cousins U Filter Filter
Bandwidth60nm nom
Minimum Transmission> 50%
Size+0.00/-0.25mm
Thickness10 +nom/-nom mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$762.00
> 5 pcs.$610.00

Estimated Delivery: 2-3 Days
Kron/Cousins U type filter/50mm x 50mm
KRON-U-50S
$723.00
$578.00
0
Filter TypeKron/Cousins U Filter Filter
Bandwidth60nm nom
Minimum Transmission50%
Size+0.0/-0.25mm
Thickness5.0 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$723.00
> 5 pcs.$578.00

Estimated Delivery: 2-3 Days
Kron/Cousins V type filter/25mm dia.
KRON-V-25
$234.00
$187.00
4
Filter TypeKron/Cousins V Filter Filter
Bandwidth90nm nom
Minimum Transmission70%
Size+0.00/-0.25mm
Thickness5.0 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$234.00
> 5 pcs.$187.00

Estimated Delivery: 2-3 Days
Kron/Cousins V type filter/28mm dia. (mounted)
KRON-V-31M
$347.00
$278.00
0
Filter TypeKron/Cousins V Filter Filter
Bandwidth90nm nom
Minimum Transmission70%
Size+0.00/-0.25mm
Thickness10 +nom/-nom mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$347.00
> 5 pcs.$278.00

Estimated Delivery: 2-3 Days
Kron/Cousins V type filter/50mm dia.
KRON-V-50
$723.00
$578.00
11
Filter TypeKron/Cousins V Filter Filter
Bandwidth90nm nom
Minimum Transmission70%
Size+0.0/-0.25mm
Thickness5.0 +0.1/-0.1 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$723.00
> 5 pcs.$578.00

Estimated Delivery: 2-3 Days
Kron/Cousins V type filter/50mm dia. (mounted)
KRON-V-50M
$762.00
$610.00
0
Filter TypeKron/Cousins V Filter Filter
Bandwidth90nm nom
Minimum Transmission70%
Size+0.0/-0.25mm
Thickness10 +nom/-nom mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$762.00
> 5 pcs.$610.00

Estimated Delivery: 2-3 Days
Kron/Cousins V type filter/50mm x 50mm
KRON-V-50S
$723.00
$578.00
1
Filter TypeKron/Cousins V Filter Filter
Bandwidth90nm nom
Minimum Transmission70%
Size+0.0/-0.25mm
Thickness5.0 +0.10/-0.10 mm
Transmitted wavefront1/4 wave per 25mm
A/R coatingsBoth exterior surfaces
QuantityPrice
1 - 5 pcs.$723.00
> 5 pcs.$578.00

Estimated Delivery: 2-3 Days