http://www.rdcrisp.darkhorizons.org/ngc7635_bubble_nebula_s2hao3_page. htm I found a Hubble shot of the Bubble earlier tonight. I couldn't resist adding it to...
yeah I am. Increase traffic? We need a new manufacturer to come out with new narrow bands that are parfocal. ;-] On Tuesday, September 30, 2003, at 02:57 AM,...
Yes, I monitor also. Lurk may be a better word... I'll announce the group's existence to some astronomers in Tennessee. Maybe this will stimulate discussion. I...
... out ... Why do they need to be parfocal, Brian? I personally focus between shots all the time anyway so it would not offer much to me from my perspective. ...
... group's ... stimulate ... contrast of ... some. But I heard somewhere of good results being obtained imaging Mars through NIR, Red and Green filters....
Hi ! ... Have a look at ASTRONOMIK. (www.astronomik.com) We do offer H-Alpha, LRGB, IR and MC filters that are parfocal. We are currently working on OIII and...
Have not tried that but was thinking about some narrow band planetary stuff. Was going to work with a freind on some uv stuff at some point. Kevin ... filter...
Gents, I do zap these jerks that infiltrate the group, but its easier said than done. I did not want to have closed memberships where folks can't join until I...
There are parfocal filters Brian. Look up Astronomik filters. Available from AVA. I have found them to be very parfocal, and I have an epsilon 130 which is...
Hi Folks: I've added a UV block filter to my FS60C to eliminate blue bloat. It does an excellent job at that but at its current position, very close to the ccd...
Thank you for your reply, I was specifically looking for some info on the kind results in practice obtained by subtracting the "continuum" from the "weak" ...
Gerd, Par focal? Ha with RGB? Up to what focal ratio and what is th ebandpass? thanks Brian ... Have a look at ASTRONOMIK. (www.astronomik.com) We do offer...
Hi Brian ! ... The H-Alpha is 15nm. All filters are made of 1mm thick glass, and the tickness differs only by something like 1/100mm. That´s "parfocal enough"...
I have a new SKY 90 fitted with a filter wheel, both used tonight for the first time. I inserted just two filters, a Lumicon Light Polution Filter and an ...
Hi Peter ! What you have seen is normal physics :-) When you insert a piece of glass the focus is shifted outward. The ticker the glass the more is the focus...
Super stuff. I really liked IC1396, but then I saw the Rosette image - exquisite. Ron Wodaski author of The New CCD Astronomy http://www.newastro.com ... From:...
Hi Richard, Those are really beautiful. I've seen your work before but I've never emailed you, they are really good. How do you determine subexposures for...
... never ... subexposures ... Thanks for the comment Ron. I do pretty much like you do: I expose to just short of saturation typically. Sometimes I will let a...
... image - ... Thanks Ron. I was really pleased and very surprised just how those two turned out. Using this weird filter combination is sort of like...
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