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Post by mahoref on Apr 18, 2014 9:07:40 GMT -5
Hi, i am Marc of Hamburg/ Germany /north europe i have a D & G 5 inch f18  till at 2001 i am hungry of more Aperture  but my question is D&G or Istar ? you can help what can i hope to see with 8 inch on jupiter,saturn ,Mars ? i made my teleskope mount and refractor tube self  |
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Post by jamesling1000 on Apr 18, 2014 22:09:05 GMT -5
Hi Marc.
Although I only have the classic 8" F8.8, but there are many members here enjoying the latest 8" R30, which will give you a much better contrast and lesser CA on planets like Jupiter, Mars and Saturn...
Go for F12 if you can manage the length..
My G11 cannot take any length longer than 6ft or 1800mm fl for the 8" ISTAR...
Regards
James Ling
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Post by Viktor Z. on Apr 19, 2014 0:08:00 GMT -5
Marc: have you decided what is your preference? Is it focal ratio or aperture? If focal ratio is your preference for planets, double stars and the Moon: I would choose the 8" f12 R35 Istar lens refractor. If aperture is your preference for deep sky observing and comet hunting then choose as big aperture you can afford. I chose the second option and I ordered my Istar 228 mm f7.7 achromatic objective. I also own an Istar 150 mm f/8 R30 refractor and I am very satisfied with it. That is the main reason I am buying again from Istar and not from another company. You can see my build and report about my 150 mm refractor in the Istar ATM forum section under "Meade...". I hope you find the best choice for you.
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Post by mahoref on Apr 19, 2014 11:09:37 GMT -5
Hi, James and viktor i live in the middle big city with 1,8 million people with big port or say it harbour. my balcoon measure 55 x 27 inch-there i have my D&G 5"f18 and selfmade german mount with 2"steel axis in both axis. now i build a selfmade german mount with 3" axis  my D&G have a very good strehl very small CA on Venus what is the difficult between istar 8inch f 12 and f15 0.90 strehl to 0,93 strehl my favorit is the 220 (8,7") f 15 with 0,93 Strehl but that cost ~750 $ more than the 8"f12-15 1659$ i want like more reviews of the 8 inch f12 can anymore me show some planet sketch or photo with Istar 8 inch ? Regards Marc |
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Post by mahoref on Mar 9, 2019 18:04:41 GMT -5
It says the year 2019-I'm in my 50th year of life (1.May 2018) and I wonder if there is still an increased experience? SMILE
Have now ordered a ISTAR lens D204 f9 achromat March 6, 2019, which just fits just on my balcony!
I was inspired by James Ling's Jupiter video
I hope I can contribute to the revival of the Istar Forum
Now i am owner of D&G FH 5"f18,Apm Apo 140f7 and Istar Achromat 8"f9
Greetings Marc
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tjn58
Junior Member
Posts: 24 
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Post by tjn58 on Mar 9, 2019 22:58:18 GMT -5
Marc, Best of luck with your build - look forward to seeing your progress. I appreciate your revival attempt on this forum.
Tom
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Post by mahoref on Mar 17, 2019 15:13:03 GMT -5
Hello Tom
Thank you for your wishes.
will do my best to make a worthy tube build around the Istar 8 "f9 lens.
Marc
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Post by jamesling1000 on Mar 17, 2019 18:27:01 GMT -5
Hi Marc..
I am sure everyone here be anxiously waiting for your update...
Regards
James Ling
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Post by mahoref on May 28, 2019 10:06:36 GMT -5
Hi,all Istar friends 
Today my lens 204 -1800 is arrived safely
the package is arrived safely
Shipment cost 160 $
now i am beginning with ATM Project
The lens could have been delivered in a wooden box in the package - would be nobler and safer in my opinion
regards Marc
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Post by mahoref on Sept 8, 2019 10:37:35 GMT -5
Hi,
27 Juni order of HP tube , arrived in the next days ,then i can beginning to working ..yppie..
then i can take the tube flange in order
Regards Marc
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Post by jamesling1000 on Nov 7, 2019 23:15:53 GMT -5
Hi Marc...
How is your dream 8 inch Istar scope progress ?
Hope to hear from you again..
Hi All...
Ales has responded in cloudynights forum, under refractor section, and currently he is offering APO lens cell, which are in 140mm and 160mm version..
Will be good if he also responds in this forum...
I am glad now Ales is back in good health... And hope to hear from him soon..
Regards
James Ling
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maho68
Junior Member
Posts: 10
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Post by maho68 on Nov 8, 2019 14:45:28 GMT -5
Hello James
I ordered the refractor tube D248 / 238 L 1550 mm in July and arrived in the middle of September.
Now missing the tube flange for lens and focuser. Unfortunately, I first have to recover financially and health is also an operation on the left ear - get a cochlear implant.
In the spring of 2020, continue with the refractor.
Greetings Marc
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Post by jamesling1000 on Nov 8, 2019 23:51:28 GMT -5
Hi Marc...
2020 just few months away... So definitely waiting to hear from you again, especially your first light report...
And you should know that 8"F9 will exhibit CA on brighter objects, and if you want to improve its performance, you must get hold of one of those chromacorr, which not only cuts down the CA, but intricate surface details will pop into view especially on Saturn, Jupiter and Mars....
Regards
James Ling
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maho68
Junior Member
Posts: 10
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Post by maho68 on Nov 16, 2019 18:26:54 GMT -5
Thanks ,James
Thats i will maked.
Now ,Tuesday i became a "new ear" to better Hearing-I am so happy.
Later :where i can buy a Quality chromacorrector ?
regards Marc
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maho68
Junior Member
Posts: 10
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Post by maho68 on Nov 16, 2019 18:36:43 GMT -5
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till at 2001
