Astronomy Half-value width 4 | OPTICS-PRO

EN / $

✓ Europe's largest sport optics specialist

✓ 7,500+ items available from stock

✓ Personal advice & service

Categories

Show main categories

Half-value width

4 (52)

10 (H-alpha), 8 (O-III) (2)

3 (27)

12 (93)

15 (2)

2,5 (3)

20 (2)

3,2 & 3,7 (1)

3,5 (21)

3,5 & 4 (21)

3,7 (4)

4,5 (1)

5 (6)

6 (81)

7 (19)

8 (5)

9 (2)

45 (1)

5,5 (7)

6,5 (59)

6,5-7 (1)

60 (2)

80 (1)

7,5 (2)

OIII: 35, SII: 15 (1)

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

Select multiple items

Manufacturer

Altair Astro (1)

Astronomik (9)

Baader (42)

Price

120 - 350 $ (12)

350 - 590 $ (27)

590 - 1,170 $ (13)

Availability

in stock (8)

short-term (43)

long-term (1)

Baader Filters SII CMOS Ultra-Narrowband 36mm

Baader

Filters SII CMOS Ultra-Narrowband 36mm

$ 403.00

ready for shipping in 1-2 weeks

Baader Filters SII CMOS f/3 Ultra-Highspeed 36mm

Baader

Filters SII CMOS f/3 Ultra-Highspeed 36mm

$ 405.00

ready for shipping in 1-2 weeks

Baader Filters OIII CMOS Ultra-Narrowband 36mm

Baader

Filters OIII CMOS Ultra-Narrowband 36mm

$ 399.00

ready for shipping in 1-2 weeks

Baader Filters OIII CMOS f/2 Ultra-Highspeed 36mm

Baader

Filters OIII CMOS f/2 Ultra-Highspeed 36mm

$ 401.00

ready for shipping in 1-2 weeks

Baader Filters OIII CMOS f/3 Ultra-Highspeed 36mm

Baader

Filters OIII CMOS f/3 Ultra-Highspeed 36mm

$ 400.00

ready for shipping in 1-2 weeks

Baader Filters SII CMOS f/3 Ultra-Highspeed 31mm

Baader

Filters SII CMOS f/3 Ultra-Highspeed 31mm

$ 338.00

ready for shipping in 1-2 weeks

Baader Filters OIII CMOS Ultra-Narrowband 31mm

Baader

Filters OIII CMOS Ultra-Narrowband 31mm

$ 333.00

ready for shipping in 1-2 weeks

Baader Filters OIII CMOS f/3 Ultra-Highspeed-Filter 31mm

Baader

Filters OIII CMOS f/3 Ultra-Highspeed-Filter 31mm

$ 334.00

ready for shipping in 1-2 weeks

Baader Filters SII CMOS Ultra-Narrowband 31mm

Baader

Filters SII CMOS Ultra-Narrowband 31mm

$ 337.00

ready for shipping in 1-2 weeks

Baader Filters OIII CMOS f/2 Ultra-Highspeed 1.25"

Baader

Filters OIII CMOS f/2 Ultra-Highspeed 1.25"

$ 319.00

ready for shipping in 1-2 weeks

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

Baader

Filters SII CMOS f/3 Ultra-Highspeed 1.25"

$ 317.00

ready for shipping in 1-2 weeks

Baader Filters f/2 Ultra-Highspeed SII CMOS 1.25"

Baader

Filters f/2 Ultra-Highspeed SII CMOS 1.25"

$ 315.00

ready for shipping in 1-2 weeks

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

Baader

Filters OIII CMOS f/3 Ultra-Highspeed 1.25"

$ 309.00

ready for shipping in 1-2 weeks

Baader Filters OIII CMOS Ultra-Narrowband 2"

Baader

Filters OIII CMOS Ultra-Narrowband 2"

$ 452.00

Product can be shipped as of 01.06.2026

Baader Filters Ultra-Narrowband SII CMOS 50.4mm

Baader

Filters Ultra-Narrowband SII CMOS 50.4mm

$ 492.00

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"

$ 650.00

Product can be shipped as of 01.07.2026