What Our Customers Have to Say
I just wanted to let you know that the NPB is doing a fantastic job in every situation possible. I could never be happier with the performance of any filter like the NPB.
Baton Rouge, LA
In a medium/large scope the DGM NPB works very well on a few targets which "some" narrowband or OIII filters don't do all that much with. The Crab Nebula (M1) which is a supernova remnant, is one of these for instance. It also does a tremendous job on the Orion Nebula (M42), the Tarantula Nebula (NGC 2070), Eta Carina (NGC 3372) and a host of other planeteries and emission nebula. If I could only own 1 filter (I own > 30), the one filter I would pick each and every time would be the DGM NPB.
In regard to the packaging, my DGM NPB filter, which I purchased over 5 years ago, came direct from DGM optics, not Omega who are the manufacturer. My filter was very nicely packaged in a hard but slightly flexible plastic case and was clearly machine laser inscribed on the side as to its origin, size and type. Couldn't fault how it arrived.
I recently purchased a used NPB filter, and I have to say that my first look at M42 through this filter knocked my socks off! I have previously used an Orion Ultrablock filter, and still use a Lumicon OIII filter, but the view of the Great Orion Nebula through the NPB was the best that I have ever had. Thanks for a fine product!
Doug Midway, FL
Tonight I was at a fairly light polluted site. It was hard to tell just how polluted with the Moon just short of full. Orion's belt was visible, to the naked eye, the sword was not. I was out because the weather was unseasonably warm and I wanted to align my new Telrad finder.
On a lark, I told my GOTO mount to find M42. Of course the Telrad showed nothing but the gray glow of the moon light. My conventional finder showed little more. The main scope, an 8 inch Meade SCT showed a few stars. I put your NPB (what does that stand for ?) Nebula filter on a 32mm Celestron Plössl eyepiece and told the scope to execute a spiral search.
There it was! NGC 1973! I've never seen a nebula before and here under the worst conditions imaginable with a modest telescope I'm looking at one.
I took a look without the filter and I could imagine that I saw something, sort of. But the DGM filter really made a difference.
I thank you.
“Tried out your NPB filter last night. Quite nice. It definitely has an edge over my Lumicon UHC. For instance, it allowed me to see edge detail in M42 beyond the UHC. I also felt that I could see the Theta-1A -- -1D a bit more cleanly than with the UHC. After a few more nights with it, I'll have a better feel for whether or not I'll be using it exclusively.”
Just a line or two to says thanks for the delivery of the NPB filter which arrived safely (some time back). I did not have a chance to try it out until last night and I had to email and say - WOW!
I have seen the Veil nebula in Cygnus before, but last night I had a chance to use the filter for the first time and was blown away! I was using a Meade 25mm eyepiece and without the filter it appeared as a very faint streak. With the filter it was an arc right across the eyepiece with detail and shape - all this with a half moon setting in the West and a hazy sky!
Your NPB filter is all the Mag said it was Dan - many thanks to you and your company for a great optical aid -- can't wait to see M42!
All the best and kindest regards”
I was recently lent 2 nebula filters made by DGM Optical. They are the VHT, Very High Throughput, and the NPB, Narrow Pass Band filters. Dan McShane, who also makes those great off-axis Newtonians, designed the filters. I believe that these filters to be the very best of their kind.
Both filters offer exceptional performance and there is enough of a difference between the 2 to appreciate the accentuation of different details in different objects in various deep sky objects.
IMO, they both beat Lumicon and Thousand Oaks UHC types. Not just in contrast, but also in optical transparency. They can take the high magnifications of the kind that I prefer planetary nebulae.
That was unanimous amongst 4 experienced of my observing friends as well. We used a TOA 130, my 6" refractor with Chromacor, my 9.75" Dob and an 18" Dob.
I had no trouble adjusting to the transmission differences and others did not mention it having to do so either. The main feature about the filters was that depth and varied gradations were maintained especially in favorite objects like the Lagoon, Trifid, Swan, Cat's Eye, M27 and Veil with the NPB. The comments were that the views of the Veil Nebula were the best ever seen in the various aperture scopes.
For me, the VHT on the Cat's Eye at 318x in my 10" Dob was a revelation. It not only showed its central star and football shaped perimeter, but also that dim "wiggly" feature that crossed its shorter longitude. I've never seen that in any of my scopes.
Old standbys like M27 had more undulations with the VHT, but much more extension with the NPB. This was true also in the larger scopes others had nearby in that many gradations were visible with the VHT. My feeling is the NPB would be more popular. With the VHT, my 9.75" Newtonian showed what I would subjectively call refractor-like contrast.
These filters have got to be amateur astronomy's best-kept secrets.
Great filters and many thanks to Dan.
Date: 18 May 2005 07:16:14
Subject: Re: Filter question
One excellent filter you left out is the DGM Optics NPB. It's like a UHC, with less starlight color distortion and a significantly brighter image. I sold my (premium) UHC which I had owned for several years when I purchased the DGM, as the results are noticeably better than the UHC.
Another advantage of the DGM is it's low price - about $105 for a 2".
I recently purchased your 2" NPB filter and must tell you it is simply incredible! I compared it to my much beloved Lumicon UHC (purchased 11 years ago) and Orion Ultra-Block (purchased about one year ago) in my 12" SCT with a fairly wide range of 2" Nagler eyepieces. The Dumbbell Nebula was the chosen target for comparison. Do you know anybody that would like to purchase a Lumicon UHC and/or Orion Ultra-Block? ;^)
David A. Jessie
President, Astronomy Club of Akron www.acaoh.org
Yeah I have a 2 inch Lumicon filter selector. I live under very light polluted skies. I loaded my IDAS and the DGM filter into the selector, I compared views with no filter, then IDAS, then yours. The IDAS filter made the background sky a little darker than having no filter, and then I slid my NPB filter into place. Wow, the sky was pitch black, and I mean totally black. The Dumbbell was still as bright as it was without a filter. Yeah, the NPB was a good buy. I can't wait to image through it.
Used my new DGM Optics NPB (narrow pass band)filter on M16 (Star-Queen nebula) last night. Using my XT10 without the filter it looked like your average small cluster. However, with the filter in place, the nebulosity was striking. I also used it on the Lagoon,Trifid, and Swan nebs and it gave a more contrasty view. I'm sold!!