Antlia ALP-T Dualband 3nm SII & OIII Filter - 2" - ALP-T-3NM-SII/OIII-2 Quintuplet Refractors Optical path length is only

Optical path length is only a short 16mm

5mm TRRS Jack(4-Pole) SHT40 Temperature & humidity sensor 2

customized fit for all your gear

The ZWO H-Alpha filter has a bandpass of 7nm and passes light at the 656nm wavelength

will not break

Antlia ALP-T Dualband 3nm SII & OIII Filter - 2" - ALP-T-3NM-SII/OIII-2 Quintuplet Refractors Optical path length is onlyThis ALP T, or Anti Light Pollution Filter, allows a 3nm narrowband transmission from both the OIII and SII bands! This model comes in a 2" threaded filter cell, which allows it to be connected to the 2" threaded accessory of your choice, including a 2" filter wheel or filter holder. For f 4 or slower telescopes. Antlia ALP T Dualband 3nm SII & OIII Filter 2" This dual narrowband filter lets the deep red Sulfur II 672. 4nm and the blue green OIII