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

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Nebulae filters (52)

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Half-value width

4 (52)

0,04 (1)

0,05 (1)

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

2,5 (3)

3 (25)

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3,5 (21)

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4,5 (1)

5 (7)

8 (5)

12 (93)

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

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Manufacturer

Altair Astro (1)

Astronomik (9)

Baader (42)

Connection (to the telescope)

1,25" (6)

2" (10)

Frame

1,25" (6)

2" (10)

Frames (12)

ring (24)

Filter Size

31 (6)

36 (9)

50 (3)

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 $ (27)

580 - 1,160 $ (13)

Availability

in stock (7)

short-term (44)

long-term (1)

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

Baader

Filters OIII CMOS f/3 Ultra-Highspeed 1.25"

$ 286.00

ready for shipping in 1-2 weeks

Baader Filters OIII CMOS Ultra-Narrowband 2"

Baader

Filters OIII CMOS Ultra-Narrowband 2"

$ 416.00

Product can be shipped as of 01.06.2026

Baader Filters OIII CMOS Ultra-Narrowband 36mm

Baader

Filters OIII CMOS Ultra-Narrowband 36mm

$ 367.00

ready for shipping in 1-2 weeks

Baader Filters Ultra-Narrowband SII CMOS 50.4mm

Baader

Filters Ultra-Narrowband SII CMOS 50.4mm

$ 453.00

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

$ 314.00

ready for shipping in 24 h

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

Baader

Filters SII CMOS f/2 Ultra-Highspeed 31mm

$ 312.00

ready for shipping in 24 h

Astronomik Filters OIII 4nm 2"

Astronomik

Filters OIII 4nm 2"

$ 800.00

ready for shipping in 24 h

Astronomik Filters OIII 4nm 36mm

Astronomik

Filters OIII 4nm 36mm

$ 465.00

ready for shipping in 24 h

Astronomik Filters OIII 4nm 50mm

Astronomik

Filters OIII 4nm 50mm

$ 800.00

ready for shipping in 1-2 weeks

Astronomik Filters H-alpha 4nm 2"

Astronomik

Filters H-alpha 4nm 2"

$ 800.00

ready for shipping in 24 h

Astronomik Filters H-alpha 4nm 36mm

Astronomik

Filters H-alpha 4nm 36mm

$ 465.00

ready for shipping in 24 h

Astronomik Filters H-alpha 4nm 50mm

Astronomik

Filters H-alpha 4nm 50mm

$ 800.00

ready for shipping in 1-2 weeks

Astronomik Filters SII 4nm 2"

Astronomik

Filters SII 4nm 2"

$ 800.00

ready for shipping in 24 h

Astronomik Filters SII 4nm 36mm

Astronomik

Filters SII 4nm 36mm

$ 465.00

ready for shipping in 1-2 weeks

Astronomik Filters SII 4nm 50mm

Astronomik

Filters SII 4nm 50mm

$ 800.00

ready for shipping in 1-2 weeks

Altair Astro Filters SII OIII DualBand ULTRA 4nm 2"

Altair Astro

Filters SII OIII DualBand ULTRA 4nm 2"

$ 640.00

ready for shipping in 1-2 weeks