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Hi Chuck,
I think that SV scopes are very good, but much too expensive. My 5" f/9.3 ($238) will outrun any SV scope short of the TMB/SV 6" APO. The new Orion ED80 should outperform the Blackhawk. Arguing witha Stellarvuite is akin to arguing with a religious fanatic. No common ground will be achieved. Al M "Chuck Taylor" wrote in message ... Hi Dave, I did my homework. SV was selling scopes with reduced aperture and claiming the reduced color was because of a "proprietary" design. They quit when they got caught. Then they applied MV filters to the objective. Then they claimed it was "attenuated" and not filtered (Sounds like Clinton and not having "sex.") They also claimed the reduced color was due (again) to "proprietary" design. That was BS. It was filtered --- pure and simple. There is nothing wrong with using an MV filter coating. But there is something wrong with MV filtering and claiming you are not doing it. Two months ago I was with an SV owner. He insisted it did not have an MV filter and he knew this for a fact because SV told him. But the coating was there. Those are the facts. Clear Skies Chuck Taylor Do you observe the moon? Try the Lunar Observing Group http://groups.yahoo.com/group/lunar-observing/ "Dave" wrote in message om... " Regards SV, the problem is you never know what Stellervue is doing to reduce the color. For a while they were stopping down the aperture (see Ed Ting's review). Then they went to applying an MV coating to the objective and calling it a "proprietary" and "attenuated design" rather than admitting they were filtering it. The last SV I saw had an MV filter applied to the objective, but the owner insisted it didn't because SV had told him so. Aside from filtering or stopping down the aperture, unless you use different (and more expensive) glass, you aren't going to reduce the color, regardless of the "zonal control" g you achieve. Clear Skies Chuck Taylor Do you observe the moon? Try the Lunar Observing Group http://groups.yahoo.com/group/lunar-observing/ Chuck: You're way behind the times and terribly misinformed there my friend. The "stopping down the aperture" scenario affected ONLY the first 6 months of scopes produced and Vic indicated to his customers (I was one of them) that there existed a problem with the 1 1/4" version (NOT the 2" focuser version). Once the problem was resolved, he allowed customers to send back their scopes for a retro-fit. For free. This was WAY back in 2000. Very, very old news. Now, as for the "attenuated design", this applied ONLY to the 102D and not any of the other scopes Stellarvue produced. Sorry to disappoint you there. The website, group site, and Stellarvue all indicated that the minus violet coatings were only appled to that specific design (102D) with the intent of reducing color. The latest version does not have this coating, as Vic decided that it's easier (and less expensive) to simply offer a filter that provides the same affect. It was an interesting design and apparently worth the effort given the reports provided by purchasers of the scope. Again, you're a bit behind the times. Try doing your homework before posting something intended to be informative. David |
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![]() "Al M" wrote in message om... Hi Chuck, I think that SV scopes are very good, but much too expensive. My 5" f/9.3 ($238) will outrun any SV scope short of the TMB/SV 6" APO. The new Orion ED80 should outperform the Blackhawk. Arguing witha Stellarvuite is akin to arguing with a religious fanatic. No common ground will be achieved. Al M Unfortunately, I think you are probably right as regards many of them. Fortunately that is not true of all of them. But it's true of enough of them that I think I'm going to drop out of this thread. Clear Skies Chuck Taylor Do you observe the moon? Try the Lunar Observing Group http://groups.yahoo.com/group/lunar-observing/ |
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