Antlia Sulfur II (SII) 3nm Pro Highspeed 31mm Filter (ANT-SII-3NM-PRO-31MM-HS)

Antlia Sulfur II (SII) 3nm Pro Highspeed 31mm Filter (ANT-SII-3NM-PRO-31MM-HS)Antlia's SHO 3nm Pro Highspeed Filters are further optimized for high speed imaging systems by pre shifting the center wavelength. This specially optimized version will provide significantly SNR (Signal to Noise Ratio) for the fast telescopes with focal ratio between f 2. 6 and f 3. 6 than the standard 3nm Pro version. The optical light path of a telescope is cone shaped, which creates an angle, and the center wavelength of the interference filter

Remove the eyepiece holder of the PowerMate by unscrewing the top half of the PowerMate from the lower half (where all the optics are placed)

While at Bin2 mode

Reflex-Blocker Coatings for largest ever freedom from halos

plus other brands of cameras including Altair

9 Focal Length (mm) 1200 Secondary Diameter 48mm Secondary Obstruction (by diameter) 24% Secondary Obstruction by Area 6% Observational Info Dawes Limit 0

Environmentally Friendly Construction

you can automatically turn on all your devices after you start the EAGLE and turn them all off when you shut down the EAGLE

This Sky-Watcher 120mm (4") f/5 telescope is a two-element

0° Field of View at 1000m: 63

45um pixels

from birders and hunters to sports fans to travelers

25” and 11” optical tubes