Antlia ALP-T Dualband 3nm SII & OIII Filter - 2" - ALP-T-3NM-SII/OIII-2 Highspeed Filters It is made to the

It is made to the highest quality standards with Zeiss glass

Field Stop Diameter: 31

A virtually circular aperture diaphragm gives out of focus regions a softer

Super Wide FOV

Planets and lunar features retain their shapes as they transit the field and the true field sizes are close to theoretical

Antlia ALP-T Dualband 3nm SII & OIII Filter - 2" - ALP-T-3NM-SII/OIII-2 Highspeed Filters It is made to theThis 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