Alpine Astronomical Baader UBVRI Bessel Filterset (36mm Round, Unmounted)

This Baader UBVRI Bessel Filterset, from Alpine Astronomical, includes all five UBVRI photometric filters.

Alpine Astronomical Baader UBVRI Bessel B Filter (36mm Round, Unmounted)

This 36mm Round, Unmounted Baader UBVRI Bessel B Filter, from Alpine Astronomical is a classic photometric filter with transmission according to Bessel and parfocal with all Baader filters of the same size. This daylight-proof filter uses ion-beam coating technology and features a Reflex-Blocker hard coating, which has been planeoptically polished, and has Life-Coat sealed coating edges. It is equally suitable for modern CMOS sensors as well as for older CCD camera technologies.

• Reflex-Blocker coatings offer largest ever freedom from halos, even under most adverse conditions concerning aux-optics
• Identical filter thickness to existing standards (2mm), with utmost care for parfocality
• Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside 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

Alpine Astronomical Baader UBVRI Bessel I Filter (36mm Round, Unmounted)

This 36mm Round, Unmounted Baader UBVRI Bessel I Filter, from Alpine Astronomical is a classic photometric filter with transmission according to Bessel and parfocal with all Baader filters of the same size. This daylight-proof filter uses ion-beam coating technology and features a Reflex-Blocker hard coating, which has been planeoptically polished, and has Life-Coat sealed coating edges. It is equally suitable for modern CMOS sensors as well as for older CCD camera technologies.

• Reflex-Blocker coatings offer largest ever freedom from halos, even under most adverse conditions concerning aux-optics
• Identical filter thickness to existing standards (2mm), with utmost care for parfocality
• Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside 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

Alpine Astronomical Baader UBVRI Bessel R Filter (36mm Round, Unmounted)

This 36mm Round, Unmounted Baader UBVRI Bessel R Filter, from Alpine Astronomical is a classic photometric filter with transmission according to Bessel and parfocal with all Baader filters of the same size. This daylight-proof filter uses ion-beam coating technology and features a Reflex-Blocker hard coating, which has been planeoptically polished, and has Life-Coat sealed coating edges. It is equally suitable for modern CMOS sensors as well as for older CCD camera technologies.

• Reflex-Blocker coatings offer largest ever freedom from halos, even under most adverse conditions concerning aux-optics
• Identical filter thickness to existing standards (2mm), with utmost care for parfocality
• Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside 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

Alpine Astronomical Baader UBVRI Bessel U Filter (36mm Round, Unmounted)

This 36mm Round, Unmounted Baader UBVRI Bessel U Filter, from Alpine Astronomical is a classic photometric filter with transmission according to Bessel and parfocal with all Baader filters of the same size. This daylight-proof filter uses ion-beam coating technology and features a Reflex-Blocker hard coating, which has been planeoptically polished, and has Life-Coat sealed coating edges. It is equally suitable for modern CMOS sensors as well as for older CCD camera technologies.

• Reflex-Blocker coatings offer largest ever freedom from halos, even under most adverse conditions concerning aux-optics
• Identical filter thickness to existing standards (2mm), with utmost care for parfocality
• Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside 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

Alpine Astronomical Baader UBVRI Bessel V Filter (36mm Round, Unmounted)

This 36mm Round, Unmounted Baader UBVRI Bessel V Filter, from Alpine Astronomical is a classic photometric filter with transmission according to Bessel and parfocal with all Baader filters of the same size. This daylight-proof filter uses ion-beam coating technology and features a Reflex-Blocker hard coating, which has been planeoptically polished, and has Life-Coat sealed coating edges. It is equally suitable for modern CMOS sensors as well as for older CCD camera technologies.

• Reflex-Blocker coatings offer largest ever freedom from halos, even under most adverse conditions concerning aux-optics
• Identical filter thickness to existing standards (2mm), with utmost care for parfocality
• Blackened edges all around, with filter-lead-side-indicator in the form of a black frontside 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