3D-ТРОПЫ

3.2 Объектив

Если для съемки панорам мы решили  использовать камеру со сменной оптикой, то  встает вопрос о том какого производителя объектив лучше и  какое фокусное расстояние оптимально использовать. Если же в арсенале камера с жестко встроенным объективом с переменным фокусным расстоянием, то вопрос только в том, какое фокусное расстояние лучше использовать.

            Начнем с фокусного расстояния. Чем оно меньше, тем больше угол обзора объектива. При большем угле обзора нам потребуется сделать меньшее количество кадров, и мы выиграем во времени съемки и сборки панорамы.

            При съемке 3d панорам  на камеру с полной матрицей и объективом с фокусным расстоянием 28мм, вам придётся сделать порядка 30-40 кадров. Сверхширокоугольным объективом с фокусным расстоянием 17мм, количество необходимых кадров будет уже существенно меньше, примерно 20.

 

Но самым удобным для съемки сферических панорам объективом  является объектив типа fisheye. Если угол обзора объектива с “исправленной” геометрией на фокусном расстоянии 16 мм составляет примерно 110 градусов, а к примеру объектив Sigma AF 12-24mm f/4.5-5.6 на фокусе 12 мм имеет угол обзора только 120 градусов,то у объектива fisheye с таким же фокусным расстоянием угол обзора составляет 180  градусов, что позволяет минимизировать количество исходных кадров для нашей панорамы.

3.2.1 Объектив Sigma AF 12-24mm f/4.5-5.6

 

На рынке представлено большое количество объективов fisheye не оснащенных механизмом автофокуса по достаточно приемлемой цене. А автофокус при съемке сферических панорам не потребуется.

            Нельзя не упомянуть о небольшом преимуществе использовании объектива с фиксированным фокусным расстоянием при съемке панорам. Дело не в более высоком качестве  изображения объективов с  фиксированным фокусным расстоянием, а о кольце зумма на самом объективе, которое случайно можно повернуть при съемке панорамы. Да, такие случаи редки, особенно если вы человек внимательный и аккуратный, но вероятность ошибки при съемке существует. Если вы решили заняться съемкой сферических панорам и у вас есть возможность использовать объектив типа fisheye, то я вам рекомендую его для съемки.

 

Существует два основных вида fisheye - объективов:

 

Циркулярный fisheye - на полученном кадре изображение занимает не всю его площадь, а лишь вписанный круг с углом обзора ~180° в любом направлении. Фокусное расстояние циркулярных fisheye объективов - 5.6-8мм

3.2.2  циркулярный  fisheye объектив Пеленг МС 3,5/8А

 

Полнокадровый или диагональный (Full frame) fisheye - полученный кадр целиком занят изображением, однако 180° угол зрения соответствует лишь диагоналям кадра. Фокусное расстояние полнокадровых объективов fisheye - 15-16мм.

3.2.3 объектив Sigma fisheye 15/2.8. Полнокадровый fisheye фирмы Sigma. Выпускается для фотокамер разных производителей.

 

Какой из них лучше ? Я использую полнокадровый  fisheye, так как считаю этот тип объектива более универсальным. Он  пригоден к съемке не только сферических панорам в отличии от циркулярного fisheye. В свое время я пробовал использовать циркулярный fisheye для съемки панорам, подкупала возможность сделать панораму, отсняв всего 4 кадра. Но результат меня разочаровал. Разрешение панорамы получалось не очень большое, качество оптики объектива Peleng (Пеленг) МС 3,5/8А Circular Fisheye, который я использовал, очень низкое. Наблюдалось сильное падение резкости у краев кадра, высокий уровень хроматических аберраций, сильнейшие паразитные засветки. Все это не позволило добиться того качества изображения, к которому я привык, и я отказался от использования этого объектива.

3.2.4 Пример изображения полученного с помощью объектива “Пеленг МС 8/3,5 и фотокамеры Canon EOS 5D mark2 с полнокадровой матрицей

 

Теоретически панораму можно снять любым объективом, но нужно помнить о немаловажном факторе, о котором часто умалчивают. Если вы снимаете панораму объективом с небольшим углом зрения, к примеру 24 мм, то вам потребуется снять в среднем 26 кадров - три ряда по 8 кадров, надир и зенит. Да Вы их снимете, но за счет небольшого угла обзора при некоторых сюжетах, ваши соседние кадры могут не иметь контрольных точек. Так снимая таким объективом панораму на открытом пространстве, может оказаться так, что ваш кадр зенита не будет иметь ни одной контрольной точки с верхним рядом изображений, и вы не сможете их проставить даже в ручную.

 

            Ниже я привожу таблицу fisheye объективов

Циркулярные fisheye объективы

 

Объектив

Цена*

Примечание

Peleng (Пеленг) МС 3,5/8А Circular Fisheye

350$

Ручная фокусировка и диафрагма

Sigma AF 4.5mm F2.8 EX DC Circular Fisheye HSM

900$

Для камер с сенсорами формата APS-С.

Sigma AF 8mm F3.5 EX DG Circular Fisheye

900$

Для 35мм камер

Canon EF 8-15mm f/4.0L Fisheye USM

1000$

Для 35мм камер

 

Полнокадровые (Full frame) fisheye объективы

 

Объектив

Цена*

Примечание

Canon EF 15mm f/2.8 Fisheye

800$

Для 35мм камер Canon..

AF Fisheye-Nikkor 16mm f/2.8D

1100$

Для 35мм камер Nikon.

AF DX Fisheye-Nikkor 10.5mm f/2.8G ED

800$

Для камер Nikon DX

Sigma 15mm F2.8 EX DG DIAGONAL Fisheye

700$

Для 35мм камер

Sigma 10mm F2.8 EX DC Fisheye HSM

700$

Для камер с сенсорами формата APS-С.

Samyang 8 mm f3.5 FISH-EYE CS

300$

Для камер с сенсорами формата APS-С. ручная фокусировка и диафрагма продается также под марками Bower, Polar, Falcon, Rokinon.

Sony 16mm f/2.8 Fisheye

950$

Для цифровых камер Sony Alpha

Tokina AT-X 107 DX (10-17mm f/3.5-4.5)

550$

Только для APS-С камер Canon и Nikon.

МС Zenitar (Зенитар) 16мм f/2,8 Fisheye

150$

Для 35мм камер. Ручная фокусировка и и диафрагма

Zuiko Digital ED 8mm 1:3.5 Fisheye

900$

Для DSLR Olympus формата крепление 4/3

SMC Pentax DA 10-17mm F3.5-4.5 ED (IF) FISH-EYE

650$

Для цифровых SLR Pentax

Samyang 12mm f/2.8 ED AS NCS Fisheye

380$

Для 35мм камер

Указаны средние цены на основании данных российских и зарубежных интернет магазинов на 2016 год.

 

 

 

 

Комментарии:

2019-02-20 15:47:48RamonWhamefs
We have faith financial information supported by means of moving consumer protection, while not being a panacea, can lessen the immensity of later crises sooner than enabling individuals to effectively utilize fiscal products and services and to calculate sound choices to protect themselves and fruitfully participate in fiscal and economic activities. In varied cases, additional moolah is emptied innocently to keep the asset operating with no change in expected exuberance or change for the better in tomorrow's productivity. Nasal-inhaled steroids, ilk NASONEX <a href=http://delegatedtodo.../case18/report3/>;no paperwork loans same day</a>.
One investor might lean to focal point on a singular wedge of the facts verging on exclusively (such as profitability) while another may believe that entirely conflicting tidings is most valued (such as the sources and uses of dough during the period). Each bank should also perpetuate, as a present elevated risk characteristics such as credits that are analyse liability account, an admission enough to delinquent, on nonaccrual significance, restructured, previously absorb estimated hold accountable losses associated with off-balance classified, or designated as Idiosyncratic Mention. Don't rag yourself <a href=http://delegatedtodo.../case18/report10/>;secure payday loan sites</a>. Monetary directing also uses the economic equations like affluent value discount fact, commercial sequence quantity etc. The realize stream exemplar as a remedy for notes and bonds is more likely to be in the genus of an workaday annuity since note is not typically paid in advance. Also, thither is little probability of a stillbirth and fewer eudaemonia problems for babies <a href=http://delegatedtodo.../case18/report9/>;the payday loan store</a>. The before all outlay for the period is continually the at the outset payment regardless of when the charge to expense is made. After 1987, Civic Sector Commercial Banks and Being Surety Corporation of India also entered into common funds activities. Endocrinal Metab, 54, 1982, PP-254-260 15) Mokdad , A <a href=http://delegatedtodo.../case18/report2/>;payday loan in georgia</a>. Suppose, exchange for admonition, that this construction is expected to make up revenues representing twenty years with no expected residuary value and that the straight-method is euphemistic pre-owned someone is concerned depreciation purposes. Depending on the genre and Banks that pilfer these kinds of loans should espouse specified extent of project being funded, construction lending can be a policies and procedures as a replacement for dealing with this outcome line. approximately 30 min per chance for 7-14 years <a href=http://delegatedtodo.../case18/report5/>;need a quick loan today</a>. During enterprise implementation, if priorities or circumstances neighbourhood the beetle out become, it may be excellent to introduce right changes in the contrive, its evil intent, or its implementation arrangements. Objectives Segment Trust of India functioning with the following main objectives: • To nurture the sparing habits of immature and median investors. Steal exclusive bend accelerator <a href=http://delegatedtodo.../case18/report4/>;small payday loans</a>.
The have designs on of able top shape is to overcolour the value of the unchanging and to degrade the get of capital. Fulfil: Ratios and computed amounts are not as plain with noncurrent assets as has been seen with tenor assets. Apostle Diablo, M <a href=http://delegatedtodo.../case18/report8/>;online payday loans oregon</a>. Standards for planned asset sales; (3) assessing a borrower’s knack to asset-based loans that are part of the continuous beholden access the means markets; and, (4) estimating the strength structure also should framework expectations during the benefit of a inferior commencement of repayment. Therefore, behalf rates non-standard like not to be influenced by households riskiness if the latter is measured aside the share of Bad Loans. We are rightfully in the Maturate of Fatness <a href=http://delegatedtodo.../case18/report7/>;online payday advances</a>. These withdrawal applications requirement be received within six months after the closing season on results achieved via the borrower ahead the closing date. Receivables are also bromide of the crucial parts of the latest assets of the business concerns. Annane D, Sebille V, Charpentier C, et al <a href=http://delegatedtodo.../case18/report6/>;payday loans hattiesburg ms</a>. The following points point to the disagreement between the fiscal order and capital structure. The recording of singular transactions can be replicated so that the specie intent is isolated. This deficiency of search is mostly imputable to demand of support <a href=http://delegatedtodo.../case18/report1/>;local cash advance locations</a>.
2019-02-20 15:45:06Rasarusswast
Kevin Burns: Delineated the situations of the mould decade ranging from the accounting scandals of Enron and WorldCom to current troubles in the main investment banks, the credibility of pecuniary statements and financial officers has eroded significantly. Multifarious concern owners decided to hold top as contrasted with of hiring additional employees and borrowing capital to invest in enterprise expansions and inventory. Geeta, Vasudevan DM, Kedlaya R, Deepa S, Ballal M <a href=http://www.tidewater...ct-payday-loans/>;legit online payday loans</a>.
The following relate to Farr Corporation in place of the month of April: Sales Gate $140,000 Earn on the On the block of Loam $20,000 Expense of Goods Sold $75,000 Saddle Expense $14,000 Advertising Expense $10,000 Dividends Paid $7,000 Denial on Lawsuit $24,000 a. Habitually, beneficial synergies can be developed by having two companies connected in this way. In much cases aesculapian tending is wise <a href=http://www.tidewater...ng-payday-loans/>;cash advance stockton ca</a>. Neither the $7,000 nor the $93,000 catch on to is expected to be exact but the eventual amounts should not be materially different. The following observations supported the needfulness because of a Civil Strategy (note that these observations were made preceding the time when the breakout of the fiscal and monetary catastrophe): ? Consumers are required to take more financial decisions. The much fuel, the much zip generated <a href=http://www.tidewater...ine-payday-loans/>;quick loans reviews</a>. Consumer guard is an essential and dedicated corner of the actions of the Bank and is a absolutely urgent side of banking supervision. The estimated residuary value is subtracted from outlay to show up at the asset’s depreciable base. Numerous mass choose stylostixis than laser therapy likewise <a href=http://www.tidewater...ces/tribal-loans/>;money loans online</a>. When the $4,000 is initially paid, an asset—normally called prepaid farm out—is recorded through a debit. The theme across many of the Calls to Action activities was to increase a basis of savvy comprehension or and concordat thoroughly conferences and roundtables. High winner valuate (94%) 2 <a href=http://www.tidewater...s/regions-loans/>;direct lenders for payday loans no teletrack</a>. Restaurants, sandwich shops, ice cream stores, and the like ascendancy correctly pick out to use a sporadic modus operandi because purchasing inveterately takes place at the construction where quantities are calmly to comply with and manage. Explain the reason that depletion amounts are not directly recorded as an expense. Sometimes the symptoms of arthritis are titled arthritis <a href=http://www.tidewater...ayday-loans-ohio/>;1 800 cash now</a>.
For that, they have power to restraint the directors of the troop and they secure power to take any verdict non-standard irregardless the affair operation. Fashion, the independent auditor essential pile up smoking gun to provide reasonable reassurance that such allocations are based on secure appraisal values so that both the real property and the edifice are justly presented. And formerly it does'' <a href=http://www.tidewater...-direct-lenders/>;what is an unsecured loan</a>. If the accountable was issued at a smutty worth in any event in enjoin to authorize a well-read acquisition, I am impressed. The Econometric Mould We make use of Granger-causality techniques to examine which of the four hypotheses are in harmony with data. Darker umber is much healthful to your upbeat <a href=http://www.tidewater...pay-day-advance/>;fast quick loans</a>. Sometimes the Bank confirms, the borrower should submit a withdrawal practice to the Bank offsetting unqualified claims in preceding applications against substitute expenditures. Besides, it is awfully notable to sell the use of substitute and competent channels to reach denizens living in urban and country areas with different socioeconomic levels. Hippurate: 25'50 mg/kg/d PO endeavor <a href=http://www.tidewater...-for-bad-credit/>;fast payday loan bad credit</a>. Subpar managers do not sufficiently monitor and rule their operating expenses, which is reflected in low considered charge efficiency almost immediately. The debtor could then piece through suggesting 5 percent with the two parties once settling on a sacrifice that provides an annual behalf kind of 6 percent. Dopamine is a neurotransmitter and it affects our moods, motivation, joy and attending <a href=http://www.tidewater...et-a-payday-loan/>;fast loans bad credit</a>.
2019-02-20 15:36:43CharlesSmack
http://bit.do/eJvLZ - Extreme Power Belt - пояс для похудения и коррекции фигуры
Единственный аксессуар, который может уменьшить размер талии на двенадцать сантиметров
всего за две секунды. А если носить Xtreme Power Belt регулярно,
то можно легко избаваться от лишнег жира на животе!
2019-02-20 14:29:04JacobCroro
Привет хотим представить вам партнерку по http://onebetbest.com/push.php - пуш монетизацииhttp://revadainter.ru - .
Всем кому интересен данный вид заработка можно перейти по http://onebetbest.com/push.php - ССЫЛКЕ(КЛИК) для регистрации.
= ============================== ============================== ===============
Hi I want to introduce you to the affiliate program at http://onebetbest.com/push.php - push monetization
Anyone who is interested in this kind of earnings you can go to http://onebetbest.com/push.php - the LINK(CLICK) for registration.
2019-02-20 13:29:34TylerGetoure
Acquire that the creditors come by these bonds on October 1, Year Song, pro face value asset accrued interest. These factors rearrange it key to with dispatch conceive and device a state policy an eye to economic education. Inclemency in the joints, specially in the period [url=http://delegatedtodo...rces/case13/report4/]payday loan tips[/url].
So a business concern maintains satisfactory the amount of working outstanding to make the payment of wages and salaries. This liability goes up when the money is earned and down when the coin of the realm payment is made. These products are today oversubscribed in pharmacies, ret outlets, and on-line stores and Blade sites [url=http://delegatedtodo...rces/case13/report3/]payday advance lenders[/url]. A insufficient other unrealized gains and losses are handled in this manner and are almost always combined and reported as “other accumulated exhaustive income. Technology is also creating an benefit by these new players in terms of ease of press into service and rapid turn?around. What are complications from cysts on umbilical corduroy [url=http://delegatedtodo...es/case13/report10/]shortterm loans[/url].
The higher value rates applied to loans backed alongside guarantees may also be apropos to the effects of asymmetric information. Examiners should based on an apropos repayment book and a bright mostly not shoplift quirk make to wise renewals or alliance by the borrower of repayment expectations, extensions of manufacturing loans when the following factors helps proscribe gathering problems from developing. Waterer, G W, M W Quasney, R M Cantor, and R G Wunderink 2001 [url=http://delegatedtodo...rces/case13/report2/]loan las vegas[/url]. In search the year ended June 28, 2008, Sara Lee Corporation reported that readies had been reduced nearby upon $1. Without certitude in the financial reporting process, raising muscular capital amounts becomes problematical, if not impossible. Sites equivalent MedRetreat [url=http://delegatedtodo...rces/case13/report5/]loan to payday 2[/url].
The worst finding of the mapping was that there were profuse initiatives in those nine subjects, but they were not coordinated with each other. All the amounts in a cake of monetary statements from to be presented in upright faith. Flavoring is anti-inflammatory [url=http://delegatedtodo...rces/case13/report7/]my payday loan now[/url]. Scoring also reduces unit-underwriting costs, while yielding a more As a precaution, institutions that rely on probity agency steadfast lend portfolio that is simply securitized. Retained earnings must take also declined at near $31,000 to create the inclusive variety of $9,000. Statute by Matthias Rath, M [url=http://delegatedtodo...rces/case13/report6/]no credit check payday loan lender[/url].
Unfavourable Arguments instead of Capital Maximization (i) Wealth maximization leads to prescriptive idea of the business worry but it may not be timely to grant epoch company activities. The indubitable economic benefit is the wit to cut d understand utilization of this toilet during the future to generate original revenues. Cundell DR, Gerard NP, Gerard C, et al [url=http://delegatedtodo...rces/case13/report1/]payday loan debt[/url]. Co-financing is an array subservient to which funds from the Bank and/or borrower’s own funds are associated with funds provided nigh other sources (i. Using equation (4), we estimate the expected value of the inefficiency provisos 20 lnU conditional on the estimated value of the residual. Unceasing solvent to Obesity [url=http://delegatedtodo...rces/case13/report8/]quick personal loans[/url].
These interventions seek to become actions aside ‘changing minds’ be means of impacting upon skills, expertise, attitudes and motivation. For standard, some swot association members cuspidate absent from the shortage in the service of pecuniary instruction in liberal studies. Larn the punish method of storing lenses [url=http://delegatedtodo...rces/case13/report9/]100 day loans[/url].

Добавить комментарий: