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Post by Watcher3 on Apr 5, 2011 6:34:08 GMT -5
Well. Did you contact Ales yet? Did you order a 144 Apo? We want to know.
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Post by cherubino on Apr 26, 2011 14:56:20 GMT -5
hello.
Yes I have a mail with Ales tha offers me a 160mm f12 but I remain interested in the new 144 lanthanium (from my skies is difficult to use the extra resolving power allowed by a 160mm... YES I have no great seeing conditions... :-(
As soon it will be ready i will get it. Let me know about your disponibility.
Thanks and best regards.
P.S.: I could be interested in the 250 f7 achromatic lens too.. better if you have a 300mm f7 (more or less) that i could use for deep sky object wiews (the 300 f10 is too long for me!)
Paolo
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Post by Watcher3 on Apr 26, 2011 17:09:23 GMT -5
Thanks for the update Paolo. I look forward to your report on the 144mm. I'm hoping for that 250mm some day too. Won't be too soon though. I'll have to retire and move to a bigger place under better skies first.  Later Joe |
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Post by cherubino on Apr 26, 2011 18:11:04 GMT -5
Hello, Joe. A question for you: have you any idea about the R30-R70 differences? Do you know if the 250mm f7 could be ordered with theese specifications? I'm really thinking to get a 250 mm lens to build a deep sky refractor. My "old" TMB 203 f9 was really nice in this applications. It lacking only a extra light... probably the 10" might be a good choice. The 12" sould be better but the standard focal ratio it's too much for me and I don't think Ales make a 300mm f7 only for me...  Paolo |
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Post by Watcher3 on Apr 26, 2011 18:32:14 GMT -5
Ales has said that he would limit the Lanthanum doublets to 180mm, possibly 200mm. It's because of glass availability in larger sizes.
You should ask Ales about a 300mm I'm sure he would do it, just don't know what the extra cost would be. When I started wanting a short 150mm, he did say that he could make me one at F/6. I don't remember exactly what costs were, but I do remember thinking that it was very reasonable. It just wasn't worth it, to me, for a 150mm classical achro.
Joe
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