Sol Robbins
Carpal Tunnel
Reged: 12/01/03
Posts: 1985
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Erika,
I hope it works well for you.
BTW, the Variable Filter I use is not a polarizing one.
I wrote a review of the first version of it.
Here's a link:
http://www.cloudynights.com/item.php?item_id=917
Best,
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S.R.
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kraterkid
Post Laureate
Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
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Kris superb sketches, your color is just spot on!
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Rich
My CN Gallery
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Sol Robbins
Carpal Tunnel
Reged: 12/01/03
Posts: 1985
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I had a chance to observe Mars. Seeing was variable ranging from good to great.
Sketch was done with a 2H pencil with blending done with my fingers.
Some details are imbedded in the sketch.
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S.R.
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Kris.
Carpal Tunnel
Reged: 09/16/04
Posts: 1677
Loc: Belgium
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excellent sketch Sol, i'm most impressed about the details you can capture in the blank desserts of mars, i've got difficulty enough with the dark regions 
this has probably been asked before, but how long have you been observing & sketching planets?
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Kris
To be old & wise, you first gotta be young & stupid
my website
my CN sketch & picture gallery
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Sol Robbins
Carpal Tunnel
Reged: 12/01/03
Posts: 1985
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Thanks Kris,
Details in Martian desserts are more easily observed with the filter I use. I can't really see anything there in intergrated light as well as any Wratten color filter. This filter shows many different details at the same time and woks best when viewing Mars.
I think I've been sketching at the telescope for 3 or 4 years.
Thanks,
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S.R.
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frank5817
Postmaster
Reged: 06/13/06
Posts: 7212
Loc: Illinois
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Sol,
This is a fantastic Mars sketch.  The details are incredible.
Frank 
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My Gallery
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Sol Robbins
Carpal Tunnel
Reged: 12/01/03
Posts: 1985
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Thanks Frank.
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S.R.
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kraterkid
Post Laureate
Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
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Stunningly beautiful Sol, I can see why you made this one your avatar image! Truly a masterpiece of astronomical art.
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Rich
My CN Gallery
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Sol Robbins
Carpal Tunnel
Reged: 12/01/03
Posts: 1985
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Thanks Rich,
I change avatars pretty often. One thing I do like about the avatar is the image scale. It gives a much better "impression" of an eyepiece-like view.
It occurs to me that there is a bit of a change taking place in my sketches. One change is in regard to the paper I am using which is very smooth. It is from Office Depot, Super White Platinum Series. That's in concert with using just a 2H pencil.
Seems like I can get a range of gray tones that are pretty close to each other. These tones are evident in that last couple of Mars sketches which shows my newer ability to render details in light and dark albdeo features with more subtlety. This paper accepts and holds on to graphite in a very controllable way.
It holds up well to rubbing when working up details which helps a lot in allowing a wider range of lifting or erasing graphite quickly. Blends smoothly too. Gray tones can be worked up faster.
I guess all of the above just adds up to being able to have a perceivable/scanable depth or richness when working on computer print out paper with a simple pencil. Blending stumps work very well on this paper too.
Its a 20 lb paper and acid free.
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S.R.
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rodelaet
Post Laureate
Reged: 04/28/06
Posts: 3185
Loc: 50°56' N - 4°58' E (Belgium)
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Sol, I'm always amazed with your splendid sketches. This one is sooo great! 
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Rony
'The Casual Sky Observer's Guide.'
My Astronomical Sketches
My Binocular Sketches
Callibrate your Monitor with this little strip.
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Tommy5
Carpal Tunnel
Reged: 03/28/04
Posts: 2523
Loc: Chicagoland
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great sketch Sol, and thanks for the sketching tips.
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Sol Robbins
Carpal Tunnel
Reged: 12/01/03
Posts: 1985
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Rony & T5,
Thanks!
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S.R.
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Special Ed
Postmaster
Reged: 05/18/03
Posts: 6339
Loc: Greenbrier Co., WV 38N, 80W
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Hi Guys,
Between work demands, poor weather, and the Holmes Hubbub I've done no Mars observing except for online images and eyeballing the bright ruddy planet from time to time--it's gotten big and bright in the last few weeks!
Kris--you've made an excellent series of observations--keep up the good work.
Sol--your latest is a gem. Rendering the "fangs" of the Gomer Sinus is a tribute to your filter, optics, seeing, and most of all, your eye.
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Michael Rosolina
Celestron CGE Pro 1400 f/11 SCT
1980 Orange Tube C8 f/10 SCT
4.25" f/4.2 Astroscan Reflector
50mm f/10 Galileoscope
40mm PST f/10
APM Germany HD 15x70 binoculars
Canon 12x36 IS II binoculars
Mark I Eyeball
My CN Gallery
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rusirius6278
Carpal Tunnel
Reged: 11/03/06
Posts: 1722
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great sketches of Mars, everyone...great to see others getting good views of Mars too...
went out to observe/sketch Mars...it was a cold 24* and mostly calm...atmospheric, etc., conditions combined for a morning of P 7-8...which is about as good as it gets around here and, as such, is a cause for celebration...imho, it provided me with my 1st truly good views of Mars this apparition.
used 159x-318x...176x provided the sharpest view...but the best overall view for detail/albedo features was 227x...so, this is the view sketched.
thus, the Vixen ED103SWT handled this and all powers used/available this session...318x was still sharp and a bit dim but still confirmed all details seen at lower powers.
the NPH really stood out again...the light blue color has returned to the NPH...it appears to cover most of it again...again, confirmed in many photos i saw a few hrs. later...
to my eye, the NPH border appeared much thinner...but still appears a very dark greyish/black...
light brown subtle details were seen in the upper N. Hemisphere...as shown in the sketch...
the white spots in the sketch represent brighter surface areas...while Syrtis Major, Hellas, and several albedo features in the region were clearly visible/seen...as also shown in the sketch...
these observations were made using a Vixen flip-mirror diagonal and no filters...the image is oriented as i saw it in the ep...Paint software was used to make this sketch.
Jim
OBSERVING DATA
Mars
11/26/07 11:45 UT
Vixen ED103SWT
227x; 159x-318x
Seeing: P 7-8
PLANETARY DATA
C Mer. 273.13
< Dia. 14.67"
Phase .9598
Mag. -1.18
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current scopes
Vixen ED103SWT
Vixen ED102S
C-102AZ/HD
StarMax 127
Jason 60/11.7
UO HD Abbe Orthos - 5mm, 6mm, 7mm, 9mm
Older UO Ortho - 4mm
Celestron 2x Ultima Barlow
and many other scopes i`ve been fortunate enough to check out...
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rusirius6278
Carpal Tunnel
Reged: 11/03/06
Posts: 1722
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Happy B-Day, Michael...hope your situation improves so that you can start presenting reports/sketches of Mars again real soon.
Jim
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current scopes
Vixen ED103SWT
Vixen ED102S
C-102AZ/HD
StarMax 127
Jason 60/11.7
UO HD Abbe Orthos - 5mm, 6mm, 7mm, 9mm
Older UO Ortho - 4mm
Celestron 2x Ultima Barlow
and many other scopes i`ve been fortunate enough to check out...
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Sol Robbins
Carpal Tunnel
Reged: 12/01/03
Posts: 1985
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Thanks Michael and happy birthday to you!
BTW, the Holmes hubbub was a very worthwhile diversion.
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Jim,
Glad to see you're posting here. I can read the features through the details your sketch presents except what appears a the 2 o'clock position,(following side). Your representation show these as linear. I definitely wish I could get a belt buckle copy of your sketch,
Best,
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S.R.
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frank5817
Postmaster
Reged: 06/13/06
Posts: 7212
Loc: Illinois
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Jim,
That is a really cool Mars sketch.
Frank
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My Gallery
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rusirius6278
Carpal Tunnel
Reged: 11/03/06
Posts: 1722
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Quote:
Jim,
Glad to see you're posting here. I can read the features through the details your sketch presents except what appears a the 2 o'clock position,(following side). Your representation show these as linear. I definitely wish I could get a belt buckle copy of your sketch,
Best,
Quote:
Jim,
That is a really cool Mars sketch.
Frank
Thanks Sol and Frank!
Sol...glad that you, Carlos, etc., are also posting here...
yes...those linear markings kept coming and going...so far, i haven`t been able to identify them conclusively as any more than just subtle darker markings within features in that area on the surface of Mars...i believe MP2 also shows a marking or two in roughly around that same area...
working on the belt buckle thingy for you... 
Thanks, again...
looking forward to your next reports/sketches...
Frank...i`ve seen numerous cool sketches throughout this entire thread...Thanks, again.
looking forward to your future sketches, etc...as well as everyone else`s here...
Jim
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current scopes
Vixen ED103SWT
Vixen ED102S
C-102AZ/HD
StarMax 127
Jason 60/11.7
UO HD Abbe Orthos - 5mm, 6mm, 7mm, 9mm
Older UO Ortho - 4mm
Celestron 2x Ultima Barlow
and many other scopes i`ve been fortunate enough to check out...
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Rick Woods
Postmaster
Reged: 01/27/05
Posts: 11940
Loc: Inner Solar System
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Jim,
How are you doing your sketch? Do you have a laptop fired up right there at the eyepiece? I'm trying to figure how it would work.
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- Rick
14" LX200
Cactus Patch Observatory
"The four points of the compass be logic, knowledge, wisdom, and the unknown. Some do bow in that final direction. Others advance upon it. To bow before the one is to lose sight of the three."
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rusirius6278
Carpal Tunnel
Reged: 11/03/06
Posts: 1722
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Quote:
Jim,
How are you doing your sketch? Do you have a laptop fired up right there at the eyepiece? I'm trying to figure how it would work.
at the ep, i use a pencil to sketch everything exactly the way i see it...noting the color as i go along...then, i come in and copy the sketch using Paint software.
since it looks the same as the sketch at the ep...just in color...imho, it then becomes more presentable in these forums than the sketch at the ep.
Thanks for asking,
Jim
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current scopes
Vixen ED103SWT
Vixen ED102S
C-102AZ/HD
StarMax 127
Jason 60/11.7
UO HD Abbe Orthos - 5mm, 6mm, 7mm, 9mm
Older UO Ortho - 4mm
Celestron 2x Ultima Barlow
and many other scopes i`ve been fortunate enough to check out...
|
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