Optolong UBVRI Photometric 5-Filter Set - 2"

Our #: ZZOFIL-ZZOL-UBVRI-2in
Mfg #:
Sale Price: $622.50 Our Price: $830.00
Free shipping for this item in the US
More Info

Contiguous US Customers:
All items we sell ship for free within the Contiguous US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.

US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.

International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.

Out of Stock
Availability: Item has been discontinued by the manufacturer

Product Details

Optolong UBVRI Photometric filters - Set of five mounted 2" filters for use in imaging filter wheels. Set includes Ultraviolet (U), Blue (B), Visual (V), Red (R), and Infrared (I) filters.

The Optolong UBVRI Filter Set is made with quality brand glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength (CWL).

Quality Filter Materials:

  • Schott B260 substrate material from Germany; 1.85mm thick
  • Multiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with ion-assisted deposition
  • Filter substrate is fine-optically polished to 1/4 wave and less than 30 arc seconds deviation from parallelism over both surfaces
  • Surface quality, according to MIL-O-13830, is 60/40
  • Optolong´s planetary rotation system is a homogeneous and precise coating procedure that ensures both high transmission of pass-band and optical density of off-band
  • Each filter comes with a plastic case with high pressure EVA case lining

    Additional Information

    About Optolong

    While Optolong is a relative newcomer to the astronomy industry, they are no strangers to optics and filters. Optolong is a division of Yulong Optics Company, a high tech company specializing in optical filter design and production. Their products include bandpass filters, flourescence filters, edge filters, longpass and shortpass filters, beam splitters, anti-reflection coatings, optical mirrors and, of course, astronomical filters.

    Established in 1999 and based in Kunming City, China, Optolong/Yulong provides nearly 2000 types of optical filter coatings annually to customers worldwide in a wide variety of industries and applications. We invite you to learn more about Optolong/Yulong, their products, facilities, and processes by viewing the short video below:



    Other Information

    • Country of Manufacture: China