Hi Group, I have the Astronomik LRGB type 2 filters with built in IR. These filters are suppose to be parafocal and I find when using focusmax with robofocus I...
Hi Chris ! What kind of telescope do you use?? If you have any refracting elements in your system you MUST refocus with all filters. CS Gerd ... [Non-text...
It's fairly common for "parfocal" filters to not quite be exactly parfocal. The faster your focal ratio, the more likely this is. Ron Wodaski The New CCD...
... elements in ... Hi Gerd I am using a C9.25 SCT and a William Optic Apo refractor. I am going to test the filters for parafocal within the same temp range...
... parfocal. ... Hi Ron This is good to know. I use the WO 110mm refrator at it's F6.5 and the C9.25 SCT at either F6.3 or F5. Cheers, Chris Appleton ... ...
Hi Chris ! ... Our filters should be parfocal at the C9.25 when you use it without additional reducers or something like this. But even if you William´s is an...
Dear Don and Group, ... Would you be so kind not to mix up things. Our filtersets have the same thicknesses within several hundereds of a mm. Our oldest...
... going ... the ... without ... William´s is an "Apo" you ... the smallest ... expensive APQs ... and ... shift. This is ... in the ... Hi Gerd Thanks for...
... LRGB ... email ... same ... had ... filter ... problems. ... Hi Eric What is the best way to measure the filter thickness? I received my LRGB Astronomik...
Eric and Gerd, I apologize for that email. It was supposed to be private to Chris. I pulled it immediately within seconds when I realized it was not. It is...
... Chris. ... not. ... to ... Eric's ... the ... than ... imaging ... the ... measurements. ... I ... Hi Don & Gerd I do not want to start any conflicts here,...
To all, For what it's worth, I have Astronomik type II LRGB and probably the most focus sensitive scope out there, the f3.3 Epsilon. I have found them to be...
Hi Don and group, ... I do not understand the meaning behind this. I do not remember any email that I wrote about thickness variations of our filters. ...
Dear Chris & list, ... We use a 500 Euro measuring device that allows the filters to be measured in cell. Otherwise you need to unmount the filters and use a ...
Hi, Eddie, The design for the 1.25" 2000XM filters and the 2" STL11000 is done. The focus right now is for the Kodak full-frame CCDs (ST7-10) and once...
Hi All, When it comes to filters, especially LPR filters, the more I read trying to select the right one and not make an expensive mistake the more confused by...
I find the IDAS filter to be the best solution to LP for imaging. As far as PR filters, I will have to see what some of the other group members feels as I...
Hi Kevin, Thanks tons for your reply! IDAS sounds familiar but I don't recall from where, I'll search & find it. If you happen to know of a place to find them...
I like the IDAS, and the Astronomik OIII. Both can be used for imaging, although the latter with ccd. For source, I would recommend AVA at Astrovid.com, as...
... the ... maybe ... go.... ... the ... enjoying ... Matt, you can look into Lumicon's Deep Sky LP Filter in which I use for ccd colour imaging. This filter...
Hi everyone, I am new to CCD imaging and using filters. Can anyone recommend reading material on filters that would help point me in the correct direction? I...
Jodi, This isn't what you asked for, but I'll give you my thoughts. There are many sites to describe and compare various filters and their use. Through study...
Looking for a filter to reduce star bloat/coma in Canon lenses of under 100mm focal length. Narrowed it down to Lumicon Minus Violet and Baader Fringe Killer....
surprised your having trouble with that, but it may be the digital factor. I never had problems with my vintage canon FD lenses, wide open, they were sharp as...
I currently have the baader fringe killer. It says if I add a Red filter + my Fringe Killer, it will create a "hydrogen alpha" filter. The problem is.. what...
... would ... Hi Jason, What they say is it will create a 70nm bandpass filter around H- Alpha at the world's lowest price. The red filter costs only EUR 25. ...
Hello : My name is Donna and I've been messing around with imaging for a little while now and would like to do better. I sometimes use a short tube 80 and...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
