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Post by astromanuk on Mar 23, 2014 7:43:36 GMT -5
Nice read Ales! Reduced weight is a good thing. Retractable dew shield is even better. If only shipping and import taxes weren't so high…..sigh. Matt Matt, I fear it will always be so. Shipping is never going down in cost due to rising global fuel prices. Governments around the world are trying to open global markets but at the same time extract as much tax revenue from every citizen. What really galls me is when you know that the shippers and government are making more profit from your purchase than Ales does for manufacturing it! |
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Post by Ales - iStar Optical on Mar 23, 2014 10:28:58 GMT -5
Hi Ales, Thank you for that very informative post. It is always great to hear fro you and Mike what Istar is up to. Can you, or Mike comment on the future possibility of tube assemblies for your 250mm range of lenses. The next logical step for me is to one of these, especially with a lighter weight assembly. Best Wishes, Z Hello Ian As of this moment we don't have an immediate plans to produce complete OTAs in 250mm clear aperture. We have a fairly limited number of lens styles in this huge aperture but for near future I'm seriously thinking about producing some 250mm F6.5 R35 SLIM in next generation style, both optical design and OTA body style. Only last week we came out with a new improved R35 doublet. The new doublets, especially in large aperture range between 204 and 250mm will show further reduction in red color halo by another 50 percent compared to latest R35 SLIM doublets. So if all goes well the next-generation could be in R45 or possibly even R50 range with much tighter more controlled CA halo around bright objects. Price of such a huge special order scope should be below 9000 range including 3.5 inch rack and Pinion Procuser, rings, diagonal and wide Losmandy style dovetail. I will share some spot diagrams as well as star computer modeling images. I'm pretty excited about this latest generation RX doublet. Cheers Ales |
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Post by astromanuk on Mar 23, 2014 19:31:55 GMT -5
Wow! Now that is exciting.
Looking forward to seeing the details.
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Post by jimcurry on Apr 1, 2014 5:35:42 GMT -5
"Every single customer that purchased a lens only and built his own tube assembly choose white as its color. " How soon we forget. 4" Istar lens  and a 6" Istar lens. A nice royal blue. For a production scope if I were to buy? White. Attachments:
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Post by Mike on Apr 1, 2014 9:05:00 GMT -5
I like your "blue" iStar refractor. I wonder if there had been some scientific paper published somewhere showing the benefits of using blue?  Mike |
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Post by mistervista on Apr 1, 2014 20:37:40 GMT -5
Mike May I make a suggestion?.. though I haven't read all the plus and minus posts it works for me. I definitely prefer the dark gray scope because it's very unique but I'm the kinda guy that if the herd goes one way then I go the other. People have remarked that my new Istar looks very much like my second scope - A Carton 100mm F13 objective lens build on 48 inches of flocked PVC pipe with 3M Automotive Vinyl Wrap in Matte Black (attached) . It's inexpensive, not hard to apply, weather resistant and lasts for years. Made a mistake? start over, no harm no foul. Cherry red? custom scopes in any color like a Skylight 100mm. As I do not know your current cost per tube to paint a scope or your preferences please just take this as a low cost alternative. Doug  |
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Post by Mike on Apr 3, 2014 14:00:39 GMT -5
Fortunately or Unfortunately, however you want to look at it, most of us were weaned on white refractors. The passion runs deep and the eye becomes attuned to what is pleasing. I got a friend who says, "A white refractor with black tube rings is sexy as XF#$ (explicit). If your brain is used to endorphins flowing at the sight of white scopes, you're not going to change that easily no matter what the advantages or disadvantages.
Mike
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russ
New Member
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Post by russ on Apr 10, 2014 20:06:40 GMT -5
White, black, blue or grey, I like them all. My first scope was a 50mm Tasco (white) and the Unitron's I lusted after were of course, white. Now I am buying a "Krivanek-TCR" 150 F12 R35. And - I'll love the black tubeless truss scope! That is, as soon as it gets here! Eh Mike!
With me, it's a - 'love the one you're with' kinda deal.. providing it's a great lens. But, yes, I'll agree with Mike & many others. White is a great default color for a telescope. The passion goes deep on that. Cannot loose by using all white scopes.
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Post by Mike on Apr 12, 2014 11:27:52 GMT -5
Russ, the TCR wouldn't look right in white. Not at all. This is one scope that could only be black. I went to Miami yesterday to do the "customs" dance with my favorite people at Customs and Border Patrol. Got home yesterday with 14 new tubes and the much needed focuser adapters for the scopes I need to get out to customer (Russ). So I will be shipping scopes first of the week. Sorry for the wait guys (Russ). Got to have all parts |
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russ
New Member
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Post by russ on Apr 15, 2014 15:14:36 GMT -5
Hi Mike, of course not. Black is best for the Asteria TCR 150-12 R35. I was referring to the tube type scopes. White on the TCR.. it would be almost 'ghost like', lol. Oh - and by the way - I just got back here after emailing you about my scope!  NOW I see why I haven't heard from you! lol, well, I'll be happier now!  It won't be long now... can't wait! |
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Post by thechuckster on Apr 26, 2014 14:17:59 GMT -5
If you wanna be distinctive with a finish nobody else offers in a 204mm refractor, how about a lacquered brass tube option? If it added a couple hundred to the price, let me be the first in line!
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Post by Watcher3 on Apr 26, 2014 18:00:14 GMT -5
Lacquered brass for an 8 inch? I think that would be beautiful, but a LOT more than pretty much anyone would want to pay.
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Post by jimcurry on May 8, 2014 6:36:32 GMT -5
It would also weigh more than most folks would think.
Jim
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NOW I see why I haven't heard from you! lol, well, I'll be happier now! 
It won't be long now... can't wait! 
