|
Hi Alex,
Jeff is correct. These filters were originally sold under the DGM Optics label and are now sold under the manufacturers label which is Omega. Dan McShane owns DGM optics.
These are very high quality filters. I have a DGM NPB filter in 1.25" and 2" format and it is an excellent filter in every respect. It is a very narrow pass UHC filter and is almost a hybrid UHC/OIII filter. It works extremely well on a wide variety of targets. I also have Astronomiks UHC, OIII and H-Beta and my DGM NPB is my most used filter.
Cheers,
John B
|