Filters < Astronomy Half-value width 4 | OPTICS-PRO

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Nebulae filters (43)

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Half-value width

4 (43)

0,04 (1)

0,05 (1)

10 (H-alpha), 8 (O-III) (1)

2,5 (3)

3 (24)

3,2 & 3,7 (1)

3,5 (21)

3,5 & 4 (21)

3,7 (4)

4,5 (1)

5 (7)

8 (5)

12 (78)

15 (2)

20 (2)

40 (1)

5,5 (7)

6 (81)

6,5 (59)

6,5-7 (1)

7 (16)

9 (2)

60 (2)

80 (1)

7,5 (2)

OIII: 35, SII: 15 (1)

OIII: 35nm±5nm, SII: 15nm±3nm (1)

OIII: 6,5 & SII: 8,5 (1)

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Altair Astro (1)

Baader (42)

Connection (to the telescope)

1,25" (6)

2" (7)

Frame

1,25" (6)

2" (7)

Frames (12)

ring (18)

Filter Size

31 (6)

36 (6)

50 x 50 (6)

50,4 (6)

65 x 65 (6)

Appropriate for...

f/10 - f/3.5 (14)

f/3,4 - f/2,3 (14)

f/3.4 - f/1.8 (14)

Price

230 - 350 $ (12)

350 - 580 $ (24)

580 - 1,170 $ (7)

Availability

in stock (2)

short-term (40)

long-term (1)

Baader Filters OIII CMOS f/3 Ultra-Highspeed 1.25"

Baader

Filters OIII CMOS f/3 Ultra-Highspeed 1.25"

$ 287.00

ready for shipping in 1-2 weeks

Baader Filters SII CMOS Ultra-Narrowband 2"

Baader

Filters SII CMOS Ultra-Narrowband 2"

$ 422.00

Product can be shipped as of 08.04.2026

Baader Filters OIII CMOS Ultra-Narrowband 36mm

Baader

Filters OIII CMOS Ultra-Narrowband 36mm

$ 368.00

ready for shipping in 1-2 weeks

Baader Filters Ultra-Narrowband SII CMOS 50.4mm

Baader

Filters Ultra-Narrowband SII CMOS 50.4mm

$ 455.00

ready for shipping in 1-2 weeks

Baader Filters OIII CMOS f/2 Ultra-Highspeed 31mm

Baader

Filters OIII CMOS f/2 Ultra-Highspeed 31mm

$ 315.00

ready for shipping in 24 h

Baader Filters SII CMOS f/2 Ultra-Highspeed 31mm

Baader

Filters SII CMOS f/2 Ultra-Highspeed 31mm

$ 313.00

ready for shipping in 24 h

Altair Astro Filters SII OIII DualBand ULTRA 4nm 2"

Altair Astro

Filters SII OIII DualBand ULTRA 4nm 2"

$ 650.00

ready for shipping in 1-2 weeks