Baader UBVRI Photometric Bessel Filter Set - 31mm Round Unmounted
Ships by Next Business Day
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.
- Baader Bessel-UBVRI Bandpass Filter Set, suitable from f/15 to f/1.8
- Classic photometric filters with transmission according to Bessel – parfocal with all Baader filters of the same size
- Manufactured with most advanced ion beam coating technology / Daylight-Proof
- Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
- Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
- Equally suitable for modern CMOS cameras as well as for older CCD camera technologies
Baader could not further improve the characteristics of their previous, Bessel-compatible UBVRI filters - but they could make the filters better. The new generation of Baader Planetarium UBVRI filters is a modern filter set that is both fully compatible with the characteristics of the original Bessel filters and at the same time meets modern demands for contemporary filters:
- The photometric filters now have the same thicknesses as all other Baader filters:
- 2 mm filter thickness for all filters up to size 2" mounted (1.25", 31 mm, 36 mm, 2")
- 3 mm filter thickness for all sizes above (50.4 mm, 50 x 50 mm, 65 x 65 mm)
- This means that they fit into any commercially available filter wheel, for which the original filters were often simply too thick and could not be fixed securely.
- They are parfocal with all other Baader filters of the same size and now also available in sizes up to 100x100mm - large enough even for modern, professional sensors, or optimal for easy handling in the common filter mounts for amateur telescopes.
- The coating of all photometric filters is manufactured in the same technology as the CMOS-optimized narrowband and LRGB filters. The lifetime Life-Coat™ guarantee also applies here.
The new generation of Baader filters feature:
- Reflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics
- Identical filter thickness to existing standards, with utmost care for parfocality
- Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter
- Each filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed)
- Life-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment
Specifications
- Filter thickness (without cell): 2mm
- AR Coating: Reflex-Blocker™ hard coated, planeoptically polished
- Special features: CMOS-optimized with Life-Coat™
- Filter mount choices: 31mm round unmounted
Life-Coat™: Limited-Lifetime-Warranty for CMOS-optimized Baader filters
A Baader Planetarium exclusive. Filters incorporating Baader Planetarium’s Life-Coat™ technology are so durable that Baader Planetarium warrants the coatings for the life of the filter. Baader Planetarium has developed Life-Coat™ using materials and processes that result in coatings which will not degrade or fail for a lifetime. Life-Coat™ coatings resist moisture, temperature extremes, and are hardened to withstand normal cleanings.
Baader Planetarium guarantees their Life-Coat™ coatings will not peel, flake or physically degrade and will withstand repeated cleaning with fine optical cleaning equipment. The Limited Lifetime Warranty applies to the original purchaser and does not cover failure from mis-use, physical damage through improper handling, or improper cleaning.
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |
- Baader Bessel-UBVRI Bandpass Filter Set, suitable from f/15 to f/1.8
- Classic photometric filters with transmission according to Bessel – parfocal with all Baader filters of the same size
- Manufactured with most advanced ion beam coating technology / Daylight-Proof
- Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
- Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
- Equally suitable for modern CMOS cameras as well as for older CCD camera technologies
Baader could not further improve the characteristics of their previous, Bessel-compatible UBVRI filters - but they could make the filters better. The new generation of Baader Planetarium UBVRI filters is a modern filter set that is both fully compatible with the characteristics of the original Bessel filters and at the same time meets modern demands for contemporary filters:
- The photometric filters now have the same thicknesses as all other Baader filters:
- 2 mm filter thickness for all filters up to size 2" mounted (1.25", 31 mm, 36 mm, 2")
- 3 mm filter thickness for all sizes above (50.4 mm, 50 x 50 mm, 65 x 65 mm)
- This means that they fit into any commercially available filter wheel, for which the original filters were often simply too thick and could not be fixed securely.
- They are parfocal with all other Baader filters of the same size and now also available in sizes up to 100x100mm - large enough even for modern, professional sensors, or optimal for easy handling in the common filter mounts for amateur telescopes.
- The coating of all photometric filters is manufactured in the same technology as the CMOS-optimized narrowband and LRGB filters. The lifetime Life-Coat™ guarantee also applies here.
The new generation of Baader filters feature:
- Reflex-Blocker™ coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics
- Identical filter thickness to existing standards, with utmost care for parfocality
- Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter
- Each filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed)
- Life-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment
Specifications
- Filter thickness (without cell): 2mm
- AR Coating: Reflex-Blocker™ hard coated, planeoptically polished
- Special features: CMOS-optimized with Life-Coat™
- Filter mount choices: 31mm round unmounted
Life-Coat™: Limited-Lifetime-Warranty for CMOS-optimized Baader filters
A Baader Planetarium exclusive. Filters incorporating Baader Planetarium’s Life-Coat™ technology are so durable that Baader Planetarium warrants the coatings for the life of the filter. Baader Planetarium has developed Life-Coat™ using materials and processes that result in coatings which will not degrade or fail for a lifetime. Life-Coat™ coatings resist moisture, temperature extremes, and are hardened to withstand normal cleanings.
Baader Planetarium guarantees their Life-Coat™ coatings will not peel, flake or physically degrade and will withstand repeated cleaning with fine optical cleaning equipment. The Limited Lifetime Warranty applies to the original purchaser and does not cover failure from mis-use, physical damage through improper handling, or improper cleaning.
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Hide Found a better Shipped Price on Frontend? | No |
Baader UBVRI Photometric Bessel Filter Set - 31mm Round Unmounted # FBESSET-RD31 2961751