Hi, I have begun characterizing my spectrophotometer. My first series of tests consisted of meauring the peak spectral response of 11 different narrowband...
Hi, I can see everyone is excited about this effort? LOL I posted an Excel file of the filter measurements to Files, folder Filter tests, file Spectronic...
Hi Richard, I've just downloaded the file to study it later. Thanks for the job done. I'll get the Baader blazed grating soon. They are a bit strange at Baader...
Hi, I uploaded a new file to Files Folder "Filter tests". The file "Filter tests.xls is a spreadsheet that contains light leakage data for a number of my...
Hi, I uploaded a new file to Files Folder "Filter tests". The file "Filter tests 2.xls is a spreadsheet that contains light transmission data for some of my...
Hi, based on what my light leakage measurements show, I am beginning to think that it may be good practice to gang on a Baader UV/IR pass filter to the optical...
Whether you need to add UV/IR suppression depends upon the response of the rest of your system. If you have IR leakage but your sensor is relatively...
Hi Ed, thanks for the reply and feedback. "I think we need to keep in mind that, while a spectrograph directly addresses the reason for which we employ the...
Hi Richard, as I am using an Everbrite diagonal what you might also consider is the fact that dielectric diagonals do have certain (in this case unknown)...
Hi Dieter, I didn't know that about dielectric mirrors and never ever considered it, very interesting. I had thought of trying to measure reflectivity...
Hi, I uploaded a new file to Files Folder "Filter tests". The file "Ganged filters.xls" is a spreadsheet that contains light transmission data for some of my...
Correction: "A 110% precision metalized film neutral density filter" should read: A 10% precision metalized film neutral density filter Regards, Richard ... ...
Hi, I uploaded a new file to Files Folder "Filter tests". The file "RGB.xls" is a spreadsheet that contains light transmission data for some of my other...
Hi, it has been driving me crazy on why my 1-1/4" Baader OIII filter passed so much NIR while the 2" Baader OIII blocked the NIR. I dug through the dresser...
My spectrophotometer testing shows that the Baader Continuum passes large amounts of NIR. The workaround is to use a ganged Baader UV/IR filter. Also, my...
Richard, Interesting discovery - something I would not have thought of happening. However, you say that your original 11/4" OIII filter "box" was NOT labelled...
Hello Yes, the filter ring should state the correct filter type. And as far as I can read the post it also does as it is actually an OIII NB filter. The point...
I actually have a 2-inch version of the earlier Baader O-III filter. At the time I bought it (about a year ago) it (and the 1.25-inch version) was the only...
Hi Wolfgang, my 1-1/4" OIII box says "#245 8395 Baader O III Filter 1- 1/4". The Filter ring is labeled "Baader Narrowband O III Filter 1- 1/4" #2458935". I...
Hi Ed, you jogged my memory. I went back to my purchase records and find that I purchased the Baader OIII on 12/21/06 and purchased my first Baader Narrowband...
NB is an acronym for narrow band. If I would have meant the two letters NB, I would habe written "NB". The Baader product numbers of the 1"1/4 and 2" filters...
Hi Wolfgang, I must admit to being confused by filter terminology. It seems that different sources use different definitions. Another issue the amateur...
Afternoon Folks! Could someone be so kind as to recommend a good colored filter to image the moon thru to show maximum detail and contrast? Thanks for the...
With what sort of equipment? I use my Astronomiks 13nm Halpha filter with great results. I have a C-11 scope with Optec 0.5 reducer and ST2k imager. ... From:...
Hi Frank! I'll be using a C-14 at native and with .6 reducer. Imager is SBIG STL-1000m. The Ha filter is a good idea, I never even thought of that, and I have...
Hi, I won another spectrophotometer on eBay, Item #320159998192. It's a Milton Roy 1001 Plus (190-950nm range) that has the advantage of a large accessible...
Gary: I also recommend Baader´s IR/pass filter, it copes with seeing and also enhances contrast. You can also use a Wratten 25 or 29, the last one is better. ...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Astroimaging_filters group. File :...
Astroimaging_filters@...
Sep 26, 2007 7:05 pm
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Thanks Richard, Eric, and Frank. This gives me several options. I will be doing most of my lunar imaging with a video cam as well as the C-14. Gary Thomas...
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