Orders placed after 4pm on weekdays will not ship until the next business day. Orders placed after 12pm Fridays will not ship until the following Monday.
Faster shipping methods may be available; just upgrade during checkout.
*Some exclusions apply.
Enter new zip code to refresh estimated delivery time.
Mainly used to study the photosheric, chromospheric, prominence and atmospheric areas of the sun, Daystar Filters' 0.4Å bandwidth Quantum H-Alpha Bandpass Filter is built to specifically improve solar surface contrast and fine chromosphere details. The filter is installed at the rear of the OTA, rather than before the primary objective so it can be used on telescopes of virtually any aperture and easily move between a variety of scopes. This version of the Quantum is designed for professional research-grade users who require tight tolerances and improved quality. To accomplish this, Daystar improved homogeneity and onband transmitance values across the substrate surface, so these filters require additional quality control steps, as well as additional fabrication and testing times.
The filter comes calibrated for the H-alpha wavelength at 6562.8Å and using the electronic tuning system, which is accurate to 0.1Å, the wavelength can be offset as much as 1.0Å in either direction for Doppler shift compensation and to highlight specific areas. The Quantum is outfitted with an RS-232 serial port that allows it to be connected to a computer and enables remote viewing of the wavelength display and control of the tuning. It runs on 12 VDC power and comes with a 6' power cord and a set of international outlet plugs for the US, EU, UK, and Australia.
In the Box
DayStar Filters Quantum H-Alpha Bandpass Filter (0.4Å, Research Grade)