Come join the friendliest, most engaging and inclusive astronomy forum geared for beginners and advanced telescope users, astrophotography devotees, plus check out our "Astro" goods vendors.
Come join the friendliest, most engaging and inclusive astronomy forum geared for beginners and advanced telescope users, astrophotography devotees, plus check out our "Astro" goods vendors.
Forum rules
"We love seeing your work and welcome any and all sketches on this forum, but please note whether your sketch is a through-the-eyepiece sketch or your rendition from an existing image / painting."
On 12 november 2022 I sketched Jupiter. As a sketcher it is always interesting to know what one has missed. Luckily one of the members of the Dutch Astroforum made a photograph around the same time through a C11 at f/20. He was not amused by the rather severe seeing, neither was I for that matter.
He gave permission to use his photograph for comparison with the sketch.
Hereby the result:
Photo with consent of MarioM, Astroforum.nl
It is obvious which details were missed while sketching, which I had trouble with, and which are the same. Overall, the similarities are quite decent anyway.
Refractors in frequency of use : *SW Evostar 120ED F/7.5 (all round ), * Vixen 102ED F/9 (vintage), both on Vixen GPDX. GrabnGo on Alt/AZ : *SW Startravel 102 F/5 refractor( widefield, Sun, push-to), *OMC140 Maksutov F/14.3 ( planets). Most used Eyepieces: *Panoptic 24, *Morpheus 14, *Leica ASPH zoom, *Zeiss barlow, *Pentax XO5. Commonly used bino's : *Jena 10X50 , * Canon 10X30 IS,*Swarovski Habicht 7X42, * Celestron 15X70, *Kasai 2.3X40 Rijswijk Public Observatory: * Astro-Physics Starfire 130 f/8, * 6 inch Newton, * C9.25, * Meade 14 inch LX600 ACF, *Lunt. Amateur astronomer since 1970.
That is an absolutely fantastic sketch! The details that you captured in your sketch are fabulous! Great work!
Jim
Scopes: Explore Scientific ED102 APO, Sharpstar 61 EDPH II APO, Samyang 135 F2 (still on the Nikon).
Mount: Skywatcher HEQ5 Pro with Rowan Belt Mod
Stuff: ASI EAF Focus Motor (x2), ZWO OAG, ZWO 30 mm Guide Scope, ASI 220mm min, ASI 120mm mini, Stellarview 0.8 FR/FF, Sharpstar 0.8 FR/FF, Mele Overloock 3C.
Camera/Filters/Software: ASI 533 mc pro, ASI 120mm mini, ASI 220mm mini , IDAS LPS D-1, Optolong L-Enhance, ZWO UV/IR Cut, N.I.N.A., Green Swamp Server, PHD2, Adobe Photoshop CC, Pixinsight.
Dog and best bud: Jack
Sky: Bortle 6-7
My Astrobin: https://www.astrobin.com/users/Juno16/
-Michael Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50 Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl Camera: ZWO ASI 120 Naked Eye: Two Eyeballs Latitude: 48.7229° N
Hi John. Well you did a great job of transferring your eyepiece view onto the sketch paper. Your perception was very much like the image from MarioM. Very nice art work John so keep at it.
Marshall
Sky-Watcher 90mm f/13.8 Maksutov-Cassegrain on motorized Multimount
Orion Astroview 120ST f/5 Refractor on EQ3 mount
Celestron Comet Catcher 140mm f/3.64 Schmidt-Newtonian on alt-az mount
Celestron Omni XLT150R f/5 Refractor on CG4 mount with dual axis drives.
Orion 180mm f/15 Maksutov-Cassegrain on CG5-GT Goto mount.
Orion XT12i 12" f/4.9 Dobsonian Intelliscope.
Kamakura 7x35 Binoculars and Celestron SkyMaster 15x70 Binoculars. ZWO ASI 120MC camera.
>)))))*>
These is great comparison. Thanks for posting it John! I believe observing planets is an acquired skill like galaxy hunting or double splitting. The more you focus the more details one can resolve.
That is an absolutely fantastic sketch! The details that you captured in your sketch are fabulous! Great work!
Thanks, The seeing didn't make it easier. I think with better seeing the turbulent area near the GRS would have been more precise.
messier 111 wrote: ↑Mon Nov 14, 2022 1:43 pm
fine work , thx .
Thank you!
helicon wrote: ↑Mon Nov 14, 2022 2:34 pm
Very close to what is seen in the photo....!
Thanks, it is clear that some details should have been more exaggerated.
Makuser wrote: ↑Mon Nov 14, 2022 2:43 pm
Hi John. Well you did a great job of transferring your eyepiece view onto the sketch paper. Your perception was very much like the image from MarioM. Very nice art work John so keep at it.
Thanks, I'll keep to it.
Bigzmey wrote: ↑Mon Nov 14, 2022 4:54 pm
These is great comparison. Thanks for posting it John! I believe observing planets is an acquired skill like galaxy hunting or double splitting. The more you focus the more details one can resolve.
Observing planets, i.e. noticing minuscule details and contrasts on a tiny ball is indeed a skill in itself. Just magnifying the sphere doesn't help.
Refractors in frequency of use : *SW Evostar 120ED F/7.5 (all round ), * Vixen 102ED F/9 (vintage), both on Vixen GPDX. GrabnGo on Alt/AZ : *SW Startravel 102 F/5 refractor( widefield, Sun, push-to), *OMC140 Maksutov F/14.3 ( planets). Most used Eyepieces: *Panoptic 24, *Morpheus 14, *Leica ASPH zoom, *Zeiss barlow, *Pentax XO5. Commonly used bino's : *Jena 10X50 , * Canon 10X30 IS,*Swarovski Habicht 7X42, * Celestron 15X70, *Kasai 2.3X40 Rijswijk Public Observatory: * Astro-Physics Starfire 130 f/8, * 6 inch Newton, * C9.25, * Meade 14 inch LX600 ACF, *Lunt. Amateur astronomer since 1970.
PeterD wrote: ↑Tue Nov 15, 2022 8:43 am
John, that is an excellent sketch. Just wondering, what was the scope/eyepiece you used for this one?
Thanks.
What I used:
The telescope was a 120 mm f/7.5 SW Evostar.
Diagonal, a Baader BBHS mirror.
Eyepiece, a Leica ASPH 17.8- 8.9 mm zoom.
A Vixen DX barlow 2X.
I used an Atmospheric Dispersion Corrector as well.
Last but certainly not least, an experienced eye.
Each in its own makes only a very slight difference, but the team as a whole does the job.
Refractors in frequency of use : *SW Evostar 120ED F/7.5 (all round ), * Vixen 102ED F/9 (vintage), both on Vixen GPDX. GrabnGo on Alt/AZ : *SW Startravel 102 F/5 refractor( widefield, Sun, push-to), *OMC140 Maksutov F/14.3 ( planets). Most used Eyepieces: *Panoptic 24, *Morpheus 14, *Leica ASPH zoom, *Zeiss barlow, *Pentax XO5. Commonly used bino's : *Jena 10X50 , * Canon 10X30 IS,*Swarovski Habicht 7X42, * Celestron 15X70, *Kasai 2.3X40 Rijswijk Public Observatory: * Astro-Physics Starfire 130 f/8, * 6 inch Newton, * C9.25, * Meade 14 inch LX600 ACF, *Lunt. Amateur astronomer since 1970.
Another excellent observation and sketch John.
You have managed to capture the details nicely on the comparison.
Gabrielle See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885 EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102 Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Tak prism, TAL, Vixen Eyepieces: Antares to Zeiss (1011110) The only culture I have is from yogurt
PeterD wrote: ↑Tue Nov 15, 2022 8:43 am
John, that is an excellent sketch. Just wondering, what was the scope/eyepiece you used for this one?
Thanks.
What I used:
The telescope was a 120 f/7.5 mm SW Evostar.
Diagonal, a Baader BBHS mirror.
Eyepiece, a Leica ASPH 17.8- 8.9 mm zoom.
A Vixen DX barlow 2X.
I used an Atmospheric Dispersion Corrector as well.
Last but certainly not least, an experienced eye.
Each in its own makes only a very slight difference, but the team as a whole does the job.
Hi John. To follow up on the Atmospheric Dispersion Corrector. Do you always use it, or only when the dispersion is easily detectable by eye?
Bigzmey wrote: ↑Tue Nov 15, 2022 7:56 pm
To follow up on the Atmospheric Dispersion Corrector. Do you always use it, or only when the dispersion is easily detectable by eye?
Hi, I only use it when dispersion is apparent. It really makes some difference, it puts blue and red waves back to where they belong. As a result details become a bit easier to spot. I always describe it as if a very thin veil is pulled away.
Refractors in frequency of use : *SW Evostar 120ED F/7.5 (all round ), * Vixen 102ED F/9 (vintage), both on Vixen GPDX. GrabnGo on Alt/AZ : *SW Startravel 102 F/5 refractor( widefield, Sun, push-to), *OMC140 Maksutov F/14.3 ( planets). Most used Eyepieces: *Panoptic 24, *Morpheus 14, *Leica ASPH zoom, *Zeiss barlow, *Pentax XO5. Commonly used bino's : *Jena 10X50 , * Canon 10X30 IS,*Swarovski Habicht 7X42, * Celestron 15X70, *Kasai 2.3X40 Rijswijk Public Observatory: * Astro-Physics Starfire 130 f/8, * 6 inch Newton, * C9.25, * Meade 14 inch LX600 ACF, *Lunt. Amateur astronomer since 1970.
Telescopes Saxon 10" x 1200 Dobsonian, Bresser 114 x 500 Dobsonian, Saxon 70 x 400 Refractor.
Eyepieces ES 82* 2" 18mm, 1.25" 11mm, GSO 2" 30mm superview, Seben mzt 8-24, Sky Watcher 58* 4mm and various Plossls.
Bino's Saxon 10 x 50, Carton 12 x 50, 10 x 25 ucf.
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