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Homa
journeyman
Reged: 06/21/08
Posts: 73
Loc: Germany,by Hamburg
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Hi,
i built a big mount for a long refractor-thats will be can take a 11"f 15 refractor.
but a 11"lens cost many money and i think over,if i am with 8" happyning(that is now my budget limit  )
now i have a Refr.5"f20 
but i want to see more on Jupiter,Mars(had always small declination in europe and i must wait much years for good opposition  )
with ccd-photos i have problem ,thats dont really with visually results
the ccd-photos from Damian Peach(C14,SCT 12") and others are very good  but it is real visually final 
regards Marc
PS:sorry for my bad english-i hope,you understand my question 
Newtons are sure low cost and higher aperture ,but seeing it a problem in the big city and with Dobson guiding is a problem to visually detail. Newtons and Apos have for me to short focal lenght 
Edited by Homa (08/21/08 05:45 PM)
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RLTYS
Carpal Tunnel
Reged: 12/18/04
Posts: 1728
Loc: New York (Long Island)
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Homa
I've been using a 10" f4.8 dob refl for observing and sketching planets (Mars, Jupiter and Saturn) for years with excellent results. As long as you have a good quality instrument and pratice guiding at higher magnifications and pratice observing you'll have no problems getting good results.
Hope this helps.
Rich (RLTYS)
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10" F4.8 Refl.
4" F5 Refr.
50mm F12 Refr. (Tasco #6TE-5)
12x63 and 10x50 Binoculars.
"I want to do more then just look."
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mikey cee
Carpal Tunnel
Reged: 01/18/07
Posts: 2287
Loc: bellevue ne.
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Marc.....I've used my Brandt 8" f/13.3 refractor since 1979. I built everything from scratch. I had a machinist do my mount and I built the OTAs myself. The late R.E. Brandt made the 8" lens and Jaegers made the 6" f/8 lens. This scope is a pure joy to use. Jupiter, Mars and Saturn are stunning! I use it 100% visually.  Mike
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Mike 10x50 sears tower binocs, 3" f/10 edmunds reflector, 2.4" f/11.7 manon refractor, 6" f/8 jaegers refractor, "The 8 Ball" 8" f/13.3 brandt refractor, 3" f/15.8 sans&streiffe refractor, 3.1" f/15 selsi refractor(towa 339), 2.4" f/15 sears refractor, selsi 30x30mm spyglass, criterion 5-draw 25x45x75x spyglass(1957).
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Homa
journeyman
Reged: 06/21/08
Posts: 73
Loc: Germany,by Hamburg
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Hi,
so long you observed(since 1979)
a very nice refractor and mount-have you more detail image of them 
have you something sketch of your observing events? 
Regards Marc
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i very like historic refractors
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mikey cee
Carpal Tunnel
Reged: 01/18/07
Posts: 2287
Loc: bellevue ne.
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Marc...I'm strictly visual. I don't sketch...sorry. Hope to get into planetary and lunar imaging sometime down the road. I'll post a couple of shots here. But I don't want to over do it for fear of boring some. Mike
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Mike 10x50 sears tower binocs, 3" f/10 edmunds reflector, 2.4" f/11.7 manon refractor, 6" f/8 jaegers refractor, "The 8 Ball" 8" f/13.3 brandt refractor, 3" f/15.8 sans&streiffe refractor, 3.1" f/15 selsi refractor(towa 339), 2.4" f/15 sears refractor, selsi 30x30mm spyglass, criterion 5-draw 25x45x75x spyglass(1957).
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mikey cee
Carpal Tunnel
Reged: 01/18/07
Posts: 2287
Loc: bellevue ne.
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Marc...another pic.
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Mike 10x50 sears tower binocs, 3" f/10 edmunds reflector, 2.4" f/11.7 manon refractor, 6" f/8 jaegers refractor, "The 8 Ball" 8" f/13.3 brandt refractor, 3" f/15.8 sans&streiffe refractor, 3.1" f/15 selsi refractor(towa 339), 2.4" f/15 sears refractor, selsi 30x30mm spyglass, criterion 5-draw 25x45x75x spyglass(1957).
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CarlosEH
Post Laureate
Reged: 01/19/05
Posts: 3067
Loc: Pembroke Pines, Broward County...
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Marc,
Many quality instruments exist for observing the Moon and planets. Your current instrument sounds like a nice one. If you can obtain a larger refractor than that would be good for the Moon and planets. A long-focus Newtonian (>F/6) with a small secondary is excellent for the planets as well. Maksutov-Newtonian and Maksutov-Cassegrain designs are excellent for the Moon and planets as well. The best of luck in a future instrument.
Mike- A beautiful set of quality refractors. Your setup reminds me of what astronomers in the late 1800's used to study the Moon and planets. Thank you for sharing them with us all.
Carlos
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kfred
Carpal Tunnel
Reged: 11/11/03
Posts: 2000
Loc: Dayton, Ohio
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Mike - Very nice scopes/set up you have their.
Fred
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River Cam - Cambridge England
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Homa
journeyman
Reged: 06/21/08
Posts: 73
Loc: Germany,by Hamburg
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Hi ,Mikey
very nice mount
which art of bearings you use?
Rect.axis diameter?
steel pipe or steel rounds ?
you use the roll-of -observatory- when you get problems with wind power?(wind still 1> tornado12 )
you not noticed your observing objects-i can not believe you missing not your observed events in long last time?-all you has saved in your mind
the picture (jupiter with 8 inch Apo by Jim phillips)corresponds at approximately your visually nature in best seeing 8/10 ?
i have anyway problem to difficult by jim phillip photos with 8 and 10 inch apo 
Regards Marc
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i very like historic refractors
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Homa
journeyman
Reged: 06/21/08
Posts: 73
Loc: Germany,by Hamburg
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Hi,Carlos
i am extrem nostalgist 
in addition i believe a 8inch f15 Refr. brings the same performance as a 12"SCT in visually view
the C 11 Ota cost ~ 2500 € > D&G 8inch lens ~ 1800 €(=2670 $)
ATM-refractor tube ~ 700 €
the C 14 OTA cost ~5975 € > D&G 10 inch lens ~6000
the ATM big mount is my problem
the earth atmosphere seeing(6-7/10) limit is by ~10 inch
regards Marc
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i very like historic refractors
Edited by Homa (08/27/08 08:24 PM)
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mikey cee
Carpal Tunnel
Reged: 01/18/07
Posts: 2287
Loc: bellevue ne.
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Marc...The shafts are 3" solid steel polished and laquered. The bearings are Dodge brand pillow blocks. I feel that my visual views of Jupiter on nights of excellent seeing easily rivals Jim Phillips' digital pictures when I have my Baader Semi-apo filter installed. The roofs are so heavy that they have not been bothered by 80+ mph winds in 23 years since my observatory was completed. Mike
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Mike 10x50 sears tower binocs, 3" f/10 edmunds reflector, 2.4" f/11.7 manon refractor, 6" f/8 jaegers refractor, "The 8 Ball" 8" f/13.3 brandt refractor, 3" f/15.8 sans&streiffe refractor, 3.1" f/15 selsi refractor(towa 339), 2.4" f/15 sears refractor, selsi 30x30mm spyglass, criterion 5-draw 25x45x75x spyglass(1957).
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