i ran out of good conditions on Tuesday night: it started out superb but got really windy to the point where I could not get the C14 to remain stable enough to...
I went to Plettstone (near Yosemite) last night (friday 22 aug) and did some imaging. This image was taken with my C14 using [SII], Ha and [OIII] filters. I...
not that exciting, but shot with Ha and OIII filters. http://www.rdcrisp.darkhorizons.org/ngc281_emission_nebula_page.htm 90 minutes of Ha and 90 minutes of...
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...
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