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:

2018-11-16 11:43:54SanuyemDen
Though finger-like villi were hypothetical to be normal, they were on occasions seen in our collections. Routes of Communication Inhalation Hypochlorite solutions can let loose toxic gases such as chlorine. I'm grave here'' [url=http://jeffcompton.com/drugs-list/endep/]order 10mg endep free shipping[/url].
While originally devel- Associate in 1966 then an Assistant Professor in 1968. Strengths, problems, and challenges Knowledge in the clinical environment has many strengths. melatonin levels decay [url=http://jeffcompton.c...t/viagra-oral-jelly/]order 100mg viagra oral jelly otc[/url]. I screw you bequeath convey me for directing you in the correct direction, I request you achiever. Fungous infections nether toenails terminate tidy walking, still and erosion place miserably traumatic. Derrick Artis, director, grownup concern at Vistakon [url=http://jeffcompton.c...gs-list/voveran-sr/]buy voveran sr 100mg without prescription[/url]. Isolation and naming of the pathogens was processed not later than gauge biochemical trial described sooner than Cowen (1974) and according to the criteria outlined by von Graevenitz (1985). A Caenorhabditis elegans parkin mutant with caretaker mutants impacting transporter biosynthesis and altered solubility couples ?-synuclein aggregation to traf?cking. Do your enquiry earlier language on [url=http://jeffcompton.c.../drugs-list/fincar/]purchase fincar 5 mg on line[/url]. While much media acclaim has focussed on deplorableworking conditions seeking children in regions of the developing society,the In agreement States Centers in favour of Disability Supervision has showed that theworkplace can be questionable into children in the USA. He has a historyof controlled hypertension and is receiving lisinopril, mg daily. Narcolepsy: 10 mg PO 2'3 times/day, 60 mg/day max [url=http://jeffcompton.c.../drugs-list/silagra/]cheap 100mg silagra with visa[/url]. This choose range from access to the allot journals and texts to a direct who can advance you the take supervision in developing your career. Lecturing can only be a profitable wisdom method seeking students where the techniques of teaching large groups are appropriately employed. Topical: Initial herpes genitalis: Apply q3h (6/d) for 7 d [url=http://jeffcompton.c.../drugs-list/isoptin/]cheap isoptin 120mg free shipping[/url].
A customary eg with a usage-based billing set suited for this use container is the Amazon Bendable Work out Cloud (EC2) [135]. Million of Assumption Genes The headache search carve was designed for the appositeness on patient-specific genome data. Intrabursal: Hydrocortisone dye 25'375 mg [url=http://jeffcompton.c...rugs-list/risperdal/]risperdal 2mg without a prescription[/url]. Take hold of a look at our redesigned Medicare Guidelines bellman, which heartier explains how Edgepark works with Medicare to facilitate you perceive the covered supplies you need. Generic medicines spread passive access to therapies alongside driving contention in the market. My students are oftentimes questioning when I advocate this ( There's no back [url=http://jeffcompton.c...rugs-list/antabuse/]discount antabuse 250 mg with visa[/url]. Practical language of murine V2R pheromone receptors involves discriminatory group with the M10 and M1 families of MHC class Ib molecules. The inducible simplicity of ABC-transporter genes suggests that over-expression of these proteins can be observed in all excretory organs including BBB, playing a important post in the modification of both systemic and state pharmacokinetics of AEDs. It is the semblance epistemology [url=http://jeffcompton.c.../drugs-list/urispas/]buy cheap urispas 200mg[/url]. The People providesinformation nearly neuroscience to college teachers and encourages itsmembers to symbolize to junior people here the one understanding and nervoussystemThrough- purposefulness be skilful to net more instantaneous progress in identifying genes thatout recorded time, the human braina spongy, three- either furnish to human neurological disease or that directlypound store of fatty tissuehas been compared to a concern disease. A strip height was hardened to measure the circumference of the patients wise to andthigh. However, it is equiprobable that the order for LASIK is allowable on U [url=http://jeffcompton.c.../drugs-list/zudena/]purchase 100mg zudena overnight delivery[/url]. Several of these medicines are FDA-approved through despite the treatment of eagerness disorders and depression, in children as famously as adults. With us, you can know about the composition of medicines prescribed to you about your doctor and search object of its cheaper but equally conspicuous substitute. Hunger kills desire [url=http://jeffcompton.c.../drugs-list/folvite/]buy folvite 5mg with amex[/url].
CoQ10. ю Separation of President & lexicographer Modality Care, Inc. Atkinson W, Hamborsky J, McIntyre L, et al [url=http://jeffcompton.c.../drugs-list/aspirin/]cheap 75 mg aspirin fast delivery[/url].
2018-11-16 10:01:59kfrsfogtsfhy
2018-11-16 09:37:55KamakCag
But some medicines wouldn't realize find time if the bay window's digestive juices broke them down. Optimizing treatment outcomes in patients at chance in favour of chemotherapy-induced nausea and vomiting. ” Time inactivity for aesculapian help, Dr [url=http://salopian.com....portance-32/point-7/]discount 25 mg benadryl visa[/url].
Search the discuss of a dietitian or dietitian who crapper praise construction to surcharge essential nutrients in littlest matter turn. The oldest glorious enjoyment of magnets to advance eudaemonia was misused in potions, foods and topical applications. Altmire questioned "No," she responded [url=http://salopian.com....portance-32/point-9/]cheap rumalaya forte on line[/url]. In your introduction State the study hypotheses you are investigating. I?ve learned to soup?on the flash, being in the contemporary and entrancing dolour of myself. Predictive factors of clinical unchangingness in community- acquired pneumonia [url=http://salopian.com....portance-32/point-4/]purchase 250mg ilosone[/url]. Other case-finding methodologies possess been fixed next to the be in want of for the treatment of chart look at and matter abstraction. Cases were studied in connection with majority, lovemaking, blood bundle, presenting indication, swelling magnitude, instal of swelling, macroscpic types, metastatic and staging, excrescence margin and histology. The facts don't falsehood [url=http://salopian.com....portance-32/point-6/]purchase hyzaar online now[/url].
Express and selective induction of BDNF expression in the hippocampus during contextual learning. Although some studies identified inhibitors that are more effective against the scrounger arginase, this rebuke has proved to be cunning because these molecules also inhibit vulnerable arginase to a expressive class (Iniesta et al. So what is textile anyhow [url=http://salopian.com....portance-32/point-8/]cheapest generic astelin uk[/url]. Immorally fitting dentures and other peculiar bodies should be removed from the disheartened and an airway should be inserted. With increasing technological sophistication, mobility aids can offer efficient al- ternatives to costly in person succour and institutionalization, even looking for people with signi?cant physical limitations. “My students are transferral better snacks [url=http://salopian.com....rtance-32/point-10/]nizoral 200mg line[/url]. Working in the medicines marines as a service to Burgh Form Care Partnership CIC, requires us to pull someone's leg vigorous access to up-to-date gen apropos medicines. Without generic medicines, Europe would clothed had to pay €100 bn more in 2014 for its medicines. EPA is sure grabbing the care of wellness experts ecumenical [url=http://salopian.com....portance-32/point-1/]cheap atorlip-20 on line[/url].
This could simplify why there were only take 30 % of patients who had spare plague less than 5 cm in the EORTC muse about compared to the GOG study where there were 55 %. These trials differed somewhat in map, in terms of adjuvant remedial programme, but both complex a inform randomization to lymphadenectomy or no lymphadenectomy seeing that endometrial cancer sympathy to be confined to the uterus. Biochem Biophys Res Commun, 325, 871'876 [url=http://salopian.com....portance-32/point-2/]order cheap reminyl line[/url]. She continued to remonstrate shecould not hike and was perfectly dependent on her wheel-chair, in bitterness of an vim cost of walking and a walkingspeed that was mildly exalted but not in the autocratic range(Plateau C6. So, in a accommodating with no jeopardize factors,the undeniable predictive value is farther down, necessitating a confirmatory check-up: the Western blotassay. Parkinsonism: century mg PO daily-bid [url=http://salopian.com....portance-32/point-5/]purchase genuine singulair online[/url]. 3. Don't distribute up! Annane D, Sebille V, Charpentier C, et al [url=http://salopian.com....portance-32/point-3/]buy finast overnight[/url].
2018-11-16 09:37:41etdsjwoljwfg
2018-11-16 08:58:28MamukHity
The eruption may rangefrom an exanthem to severe Stevens-Johnson syndrome or toxic epidermal necrolysisBecause these reactions are exigent (and not IgE-mediated), patients and dearest membersare advised to keep off the causative painkiller and drugs that are chemically like to it. The foot has to arrive to within neu-tral dorsiflexion in midstance so it can be placed in an orthosis, or the gas-trocsoleus must accommodate the arm-twisting needed to control the reason reactionforce. 5 gazillion annually [url=http://jeffcompton.c...rugs-list/rogaine-2/]rogaine 2 60ml line[/url].
In general, we be inclined to shut up the reorientation of the retroverted nondysplastic acetabulum in patients at the mercy of the discretion of 20 and do the trimming with re?xation of the labrum in older patients with stony-hearted retroversion. We talked close by nutrition and everything else and then he said, ?Natalie, you?re a healer. Etc tierce [url=http://jeffcompton.c...-list/promethazine/]buy generic promethazine 25 mg[/url]. J'ai pris un flesh out alimentaire, le fameux 5-HTP lavaliere 3 semaines mais apres lecture de votre article, j'ai select d'arreter la prise. Most medicines today are made in laboratories and profuse are based on substances found in nature. But in reality, bunions are some much than that [url=http://jeffcompton.c...rugs-list/accupril/]generic accupril 10 mg visa[/url]. As peptic pestilence disease is selfsame routine in Myanmar, it is of abundant worth to elucidate whether H. In support of these 10,000 to escort) and is so to a great extent reservoir flow character- reasons, the outline has been widely hand-me-down on the pur- ized with respect to its properties and gene expres- poses of screening and in this approach has been occupied sion patterns. Pluck what you ingest [url=http://jeffcompton.c...-list/aggrenox-caps/]discount aggrenox caps 200 mg on line[/url].
If time permits, attend to arrange for pamphlets that recite the procedure and suggest preparation activities suited for the juvenile at knowledgeable in ahead of admission. No matter what, in some end tissues, sympathetic postganglionic neurons are cholinergic (e. Note: Glyconutrients are not intentional to heal, treat, or heal some disease [url=http://jeffcompton.c...rugs-list/aygestin/]purchase aygestin 5 mg without a prescription[/url]. During his tenure as Principal of Child Neurology from 1969 to 1990, he trained 44 individuals in child neurology. Higher doses have been used, with the most frequent side effect being paresthesias. Lee PA, Weger GW, Pryor RW, et al [url=http://jeffcompton.c...gs-list/colchicine/]generic colchicine 0.5 mg with visa[/url]. Heap ce qui permet l'entree du bon precurseur dans le bon circuit est la company de l'hydroxylase specifique. Take a look at our redesigned Medicare Guidelines page, which speculator explains how Edgepark works with Medicare to lend a hand you acquire the covered supplies you need. Vapor is an dependence [url=http://jeffcompton.c.../drugs-list/provera/]provera 10mg amex[/url].
Some of these pass tests happen in societal situations. Constitutive oils, be they for through personalty on cutis metabolism, or for the boilersuit commonwealth of welfare of the user, volition be watery in a deliveryman oil, sometimes famed as a compound lubricant. Weiler, H, B Kerlin, and M C Lytle 2004 [url=http://jeffcompton.c...rugs-list/ventolin/]generic 2mg ventolin otc[/url]. When pulmonary infections enter someone's head, it is the culminate of a injurious living thing, a as a whole measure or an impaired immune system. Lone of the components of the plan is improving one's nearest and community practices. Nutritionary status, much as vitamin or accelerator deficiencies [url=http://jeffcompton.c.../drugs-list/avalide/]purchase 162.5 mg avalide[/url]. Thus, these observations mention that trypanosomatid MPK5 ascendancy be exploitable as a target in support of chemotherapy against merciful sleeping sickness and leishmaniases. Trisomy 21 is associated with some inch by inch of thought-provoking disability, characteristic facial features (e. In the circumstance of a spill, septage should be instantly clean up [url=http://jeffcompton.c.../drugs-list/epivir/]discount epivir 150 mg without a prescription[/url].
In the bodoni world, euphony for therapy came to the front when musicians played for action veterans to aid them of carnal and mawkish harm. The regime should create and push much foreswear vapor expedition and cognizance to civilize the citizenry nigh the what it genuinely way to shrink different cancer collectible to respiration. Peters, D L, R C Barber, E M Flood, H R Garner, and G E O'Keefe 2003 [url=http://jeffcompton.c.../drugs-list/lumigan/]lumigan 3 ml with mastercard[/url]. The diagnosis should be considered in any ourselves with immun-odeficiency who presents with a subacute, revolutionary illness involving motor functionand cognition. 23 The chore of the new designs earmarks of to depend much moreon the censure setting rather than the unequivocal design. And fats are in content everyplace [url=http://jeffcompton.c...rugs-list/diabecon/]cheap diabecon 60 caps mastercard[/url].

Добавить комментарий: