Image of the day

Captured by
Douglas Rollain

Lion Nebula SH2-132 - RC71

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Posts Made By: Linton Rohr

February 6, 2007 03:55 AM Forum: Beginning Astronomy?

High magnification issue ??

Posted By Linton Rohr
Hi Brooks.
I hope you're enjoying the scope, otherwise. wink
That's a pretty high quality Antares secondary,
and I don't recall having any problems with it.
The coatings are durable enough that they should not be easily scratched.
In any case, I never found the need to clean the secondary,
though I did give the primary a good spring cleaning or two.
Sounds like you've developed a substantial dust layer,
and perhaps there are "scratches" in it.
Hard to say without seeing it. Can you post a picture?
Maybe a cleaning would help resolve things.
Let's see what other's have to say...
Linton

February 13, 2007 12:50 AM Forum: Eyepieces

Question on the Pan 41mm.

Posted By Linton Rohr
Hi John.
Another consideration with the 41 Pan is exit pupil.
Like Randy, I was using mine with an f/10 SCT (LX-90), and it performed very well,
with a fairly sharp outer field, and a 4.1mm exit pupil.
But when I got my f/4.3 Starmaster, the exit pupil went up to 9.5mm!
I used it anyway for a while, but soon had to "downsize" to the 31 Nagler. wink
I love the 31 personally, but your preference may depend on the scopes you're using.
Linton

February 18, 2007 07:08 AM Forum: Off Topic Discussions

Dances With Wolves

Posted By Linton Rohr
"All other events, whether reinacted or created, depict authenticated facts..."
Well...more or less, Rod. I did detect a small measure of poetic license. wink
I am sorry that my Starmaster dance was insufficient homage to ensure a peaceful evening.
Perhaps a human sacrifice would have been appropriate.
I did have my eye on several individuals on the east side of the parking lot.
I must also apologize for not offering you a cigarette after your 'climactic moment' with the Rosette. 8)
Thor's Helmet was good too, but don't forget the Cal. Neb.
(See Ivan Ong's photo's of the Rosette and the Cal in Digital SLR AstroPhotography)
All in all, it was a worthwhile trip, especially since our public star party was clouded out tonight.
At least, I think it was...
If not, then I slept through it for no apparent reason. shocked
Linton

p.s. - I have 'danced with wolves', up in Yellowstone, and that is another thing entirely! grin




February 19, 2007 04:38 AM Forum: Solar System Observing

Saturn this August ??

Posted By Linton Rohr
Hi John.
Saturn is well placed now, and for the next couple months,
but you can look forward to Jupiter in August. grin
It is visible now, in the pre-dawn hours, just above Antares in Scorpius.
So it should make a good evening target starting in about June.
I hope that will ease your pain a bit. wink
Linton

February 19, 2007 05:41 AM Forum: Landscape Photography

Capitol Reef in Moonlight

Posted By Linton Rohr
Another one...

February 19, 2007 05:52 AM Forum: Landscape Photography

...in Sunlight, too!

Posted By Linton Rohr
Another one...

February 20, 2007 12:10 AM Forum: Reflectors

FYI there is a Dobsonian Forum

Posted By Linton Rohr
"...an actual live moderator who checks in daily."

Wow, what a deal! Just what Herb had in mind. 8)
See you there, Don! grin
Linton

February 22, 2007 01:47 AM Forum: Digital SLR AstroPhotography

M46 and Planetary

Posted By Linton Rohr
Looks good, Alex! The OC with a bonus. grin
I had good visual images the same night from Mt. Pinos.
Seeing and transparency were both quite variable.
Linton

February 23, 2007 01:51 AM Forum: Reflectors

New Moderator!

Posted By Linton Rohr
Thanks Floyd. Though I sort of got drafted.
I think we can maintain a freindly and respectful forum here, easily enough.
I just hope there's no "new moderator curse".
Or is that where this rain came from? wink
Linton

February 23, 2007 11:43 PM Forum: Pictures of Me and My Telescope and........

My New Toy

Posted By Linton Rohr
Bravo! Looks like fun, Dave.
Hope you have clear skies to try it out.
The rotatable OTA sounds interesting.
Linton

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