The shape and width of observed PSFs varies slightly over time, due to the change in focus of the telescope. The focus variation consists of two terms: a secular change due to the ongoing shrinkage of the Metering Truss Assembly at an estimated rate of 0.25 ?m month -1 , and short-term variations, typically on an orbital time-scale (the so-called "breathing" of the telescope). ... See Figure 5.8 ). ... Figure 5.8: Measured OTA Focus Position (microns) as Function of Days since January 1, 1994. ...

... The various Inst :Focus scripts allow you to take a series of exposures over a range of secondary mirror focus values, report the resulting FWHMs and optionally adjust the focus to the estimated best value. ... Slitviewer scripts assume the focus star is on the boresight. ... Focus scripts runs in three phases: . ... The script moves the boresight so the focus star is visible next to the slit, sets the focus to Center Focus, takes an exposure and tries to measure the star's FWHM. ...

... Астрофорум - астрономический портал ? ... Астрономическое оборудование и аксессуары (Модераторы: zlyden , Denk36 ) ? Clement Focuser . ... Рейтинг: +84/-10 . Ответ #60 : 31.03.2010 [22:35:36] ? ... Записан . ... http://www.astronica.ru/2010/11/27/clement-focuser/ . ... Цитата: Mikhail Nalivkin от 29.11.2010 [13:20:31] Собрал что-то похожее на фокусер Клемента, даже ездит . ... Цитата: Mikhail Nalivkin от 29.11.2010 [15:51:19] По 2 пружины - многовато для моего радиуса изгиба. ...

Общая Астрономическая Конференция > Форумы общей направленности > Любые вопросы от новичков . Orion 130 + Canon 350D prime focus . ... Viacheslav . ... Отправить личное сообщение для Viacheslav . Найти еще сообщения от Viacheslav . ... Olympus 10x50 DPS I, Canon EOS 500D . ... Сообщение от Viacheslav . ... Скрещивание Canon 350D и NexStar 130 SLT . ... Canon 350D . ... Астрономическая фотография . ... шнурок Canon 350D на RS232 . ... Canon EOS 350D vs. Canon EOS 20Da . ...

... FOCUS is used in VLBA test observations to specify an increment to the focus value used for the subreflector position. This is added to the nominal position known by the on-line system for the particular receiver. ... This parameter might be used in astronomical observations if one wished to have the most optimum focus for a given frequency for a receiver that has a significant focus variation with frequency. ... Argument: An incremental focus position in mm. ... Default: 0.0 . ...

... For high spectral resolution observations the devices permanently located at the N2 focus of the BTA are used (Klochkova, 1995, Panchuk, 1995). However for a number of tasks to be performed, it is needed to rule out the influence of the second and third mirrors, i.e. to realize the high spectral resolution ( ) directly at the prime focus. ... Examine the principal parameters of the PF echelle spectrometer, which is equivalent in spectral resolution to the CCD-equipped MSS (Panchuk, 1995). ...

Next: Фокусировка при использовании CCD Up: Существующие команды, специфичные для Previous: Существующие команды, специфичные для . Команда фокусировки предназначена для получения на одном CCD-кадре нескольких экспозиций объекта (звезды) с разными значениями фокуса телескопа. ... Команда имеет вид: FOCUS/NICE EXP [NUM] [FOCUS] [STEP] [FILTER] [GAIN] [TPREF] . ... FOCUS/NICE EXP=3. ... Параметры FILTER и GAIN устанавливают локальные значения (значения для одной текущей экспозиции). ...

... Gallery . ... Double Beam Spectrograph on Nasmyth A focus . Sidebar Left . Sidebar Top . No Sidebar . Sidebar Bottom . Sidebar Right . ... Title: Double Beam Spectrograph on Nasmyth A focus . Description: Image: Dione Smith . ... Double Beam Spectrograph on Nasmyth A focus Image: Dione Smith . Powered by Gallery 3.0.9 (Chartres) . ...

Университет . ... Наука Патенты Программа Deep Focus . Год: 2013 г., . ... Дата публикации: 2013-01-09 . ... 2013 | ... Самарский государственный аэрокосмический университет имени академика С.П. Королева . национальный исследовательский университет)" . ... Тел.: 846) 335-18-26 Факс: (846) 335-18-36 . Содержание Интернет-портала СГАУ: . тел. +7 (846) 267-45-60, . e-mail: webmaster@ssau.ru . ... Тел.: (846) 267-44-99 . ... СГАУ 2016 http://ssau.ru | http://сгау.рф | ...

... Легкая утепленная куртка. ... Артикул: 48691 Цвет: морская волна Состав: 50% шерсть, 50% акрил Описание: теплая двойная шапка с помпоном, выполнена из полушерсти, декорирована рисунком из модных кос. ... Машинка Ford Victoria 1953 голубого цвета с белой крышей - это точная копия настоящего ретро-автомобиля в масштабе 1:24. Автомобиль Ford Victoria был выпущен в 1953 году и отличался оригинальным дизайном с заниженной крышей и хромированными элементами кузова. ... Пол: Мужской . ...

The AstroGuide . ... AstroGuide | ... Other Sites . ... AstroGuide Listing . ... See many more Astronomy Listings by: Category or Alphabet . ... Web Site . ... Awful Christmas shopping experience. Site said everything I wanted was in stock when I placed the order, two weeks before Christmas. ... No web site-to-inventory integration, no order confirmation via email, unavailable customer service, and an incomplete order. This was the recipe for my abysmal experience with Focus Camera. ... Web . ...

It was during "sharing" time in my first week as a teacher's aide at Sunset View Elementary School in San Diego. ... So how can we get our school teachers to know more about science? One approach is to provide science enrichment programs for current and prospective teachers, and many such programs have had success. But there's a second approach that deserves far more attention than it has received: providing opportunities for scientists to become classroom teachers. ...

... POLAM-L . ... HOME . ... ABOUT LOMO . PRODUCTS . MICROSCOPES . ... SURGICAL MICROSCOPES . ... Home Products Microscopes POLAM-L Focusing Knob . ... One full revolution of the large knurled knobs corresponds to 6.3mm (coarse) and 0.25mm (fine) of the stage’s vertical movement. The coarse focus has a travel range of 33mm and the fine – 2.5mm. ... LOMO America, Inc. ... 847) 215-8800, Fax: (847) 215-9073 . ... 2000-2016 LOMO America,Inc. ...

. Album : asv-album :: Technical photos :: 2011 ::focusing . Up . 700 3728 28-70 28 . 700 3729 28-70 35 . 700 3730 28-70 70 . 700 3731 50 . DSC16523 18-200 200 . DSC16524 18-200 135 . DSC16525 18-200 70 . DSC16526 18-200 35 . DSC16527 18-200 24 . DSC16528 18-200 18 . DSC16529 18-55 18 . DSC16530 18-55 24 . DSC16531 18-55 35 . DSC16532 18-55 55 . DSC16533 . DSC16533 50 . Photo album generated by album tool a MarginalHack by David Ljung on Mon Jan 19 20:21:22 2015 .

... The Nasmyth platform for the old Visitor Focus on VLT-Melipal (UT3) as seen from the Nasmyth access platform on the fixed part of the telescope enclosure. ... Detailed view of the opening and the rail. ... View from the Nasmyth platform towards the (fixed) Nasmyth access platform. ... View from the Nasmyth access platform towards the Adapter/Rotator. ... This is the only position where direct access from the Nasmyth access platform is possible; telescope azimuth motion has to be locked in this case....

... Bojan Nikolic web pages (r. 329) . ... The model beams with various amount of defocus for a telescope with moderate coma and the error beam for that focus setting, that is the difference between the model beam and the model beam for a perfect (no coma) telescope. ... Error beam . ... The search results are restrict to these pages only . ... Copyright 2005 -- 2016, Bojan Nikolic feedback welcome ...

The pitch, roll, and focus errors of the telescope (measured and computed in AO9 survey and tilt sensor pitch,roll ) can be corrected by using the tiedowns. ... Tiedown positions to correct the pitch,roll, focus errors versus azimuth for za 2 through 20 degrees. ... The pitch, roll, and focus errors are plotted versus azimuth for za 1 to 20 degrees (the color changes every two degrees) . ... The pitch error is on the top and the roll error is on the bottom. ... The pitch and roll errors versus za. ...

... Оборудование (Модераторы: LifeIsGood , Hornet ) > . Crayford focuser и Доб SW 10" . ... Оборудование и телескопы . ... Оффлайн . Сообщений: 5127 . Благодарностей: 21 . 02 Июнь 2008, 14:03:32 ? ... Записан . ... Ответ #1 : 02 Июнь 2008, 14:04:49 ? ... Сообщений: 5658 . ... Цитата: Mott от 02 Июнь 2008, 14:36:15 Alex, . ... Цитата: Mott от 03 Июнь 2008, 12:07:17 Aga, . ... Цитата: Mott от 02 Июнь 2008, 14:05:44 А теперь и сам вопрос (наверняка подобная ситуация уже встречалась): . ...

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STEP INTO THE BLUE - MEADE INSTRUMENTS PRODUCT GUIDE . ... Meade 4M Community . ... Telescopes . LX850 Series . ... LX600 Series . ... Meade's revolutionary LS LightSwitchтДв series of telescopes use advanced technologies to do what no other consumer telescopes have done before: take all the hassle out of using a telescope. ... Optical Tubes . ... Meade 8x50 Rear Focus Viewfinder #07828. Easily locate and center deep sky objects with this straight-through viewfinder with convenient rear focus. ...