Description | 1.25" dia. mounted | 50mm dia. unmounted | 50 x 50 mm square unmounted |
---|---|---|---|
RGB & Clear Filter Set | $550 | $1700 | $1800 |
Luminance Filter (IR-blocked Clear) | $125 | $495 | $495 |
Photometric UBVRI Filters (Johnson/Cousins/Bessell) | $350 per filter | $750 per filter | $850 per filter |
Clear Window for UBVRI | $75 | $125 | $150 |
Neutral Density Filter (ND 2, 1.0%T) | $175 | $250 | $300 |
Description | 1.25" dia. mounted | 50 mm dia. unmounted | 50 x 50 mm square unmounted |
---|---|---|---|
Hydrogen Alpha* 656.3/3 nm (The ultimate light pollution filter) |
$625 | $1300 | $1600 |
Hydrogen Alpha* 656.3/5 nm | $500 | $1200 | $500 |
Hydrogen Alpha* 656.3/8-10 nm | $375 | $850 | $475 |
Red Continuum 640/10 nm | $600 | $900 | |
[O III] 500.7/ 3 nm (Oxygen) | $625 | $1300 | $1600 |
[O III] 500.7/ 8 nm (Oxygen) | $400 | $850 | $950 |
Green Continuum 510/10 nm | $600 | $900 | |
Hydrogen Beta 486.1/3 nm | $625 | $1300 | $1600 |
Blue Continuum 470/10 nm | $375 | $900 | |
[S II] 672.4/ 3 nm (Sulfur) | $625 | $1300 | $1600 |
[S II] 672.4/ 8 nm (Sulfur) | $375 | $850 | $950 |
Methane 889/18 nm | $450 | ||
Spanner Tool for unmounting 1.25" filter | $15 | - | - |
Optics Cleaning Kit | $135 |
* For nighttime use only. NOT for solar viewing.
- Contact us for pricing on other sizes, including custom sizes.
- All filters have anti-reflection (A/R) coatings.
- Narrowband filters are also useful for capturing high resolution images in cities and other areas with high contamination by unwanted light. Thus, they are effective light-pollution filters.
Typical filter spectra

Hydrogen alpha 656.3/10 nm*
(NOT for solar viewing.)

Hydrogen alpha 656.3/4.5 nm*
(NOT for solar viewing.)

Hydrogen beta 486.1/4.5 nm
![[Oxygen III] 500.7/4.5 nm](images/500.jpg)
[Oxygen III] 500.7/4.5 nm
![[Sulphur II] 672.4/4.5 nm](images/672.jpg)
[Sulphur II] 672.4/4.5 nm

UBVRI Johnson/Cousins/Bessell Filter Set

RGB Filter Set

IR-blocked Clear (Luminance)

Neutral Density 2

Multi-Band Hα (656.3nm), [O III] (500.7nm), and Hβ (486.1nm)- One filter, 3 emission lines.

Hydrogen Beta

Narrowband Filters
Products
Please contact us with any questions you might have
Check out our Optics Cleaning Kit.
Custom Scientific, Inc.3852 North 15th Avenue
Phoenix, Arizona 85015 USA
Phone: 602-200-9200
