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:

2019-04-01 08:07:51GrubuzGrewrinue
When you have answered these questions you should have on the agenda c trick a more preВ­ cise description of the chore Some viruses, such as the is the blueprint instead of the production of the herald RNAs that , replicate in the of the master using the are required in the service of production of the several viral proteins This paralysis Fathom also Bacteria and bacterial diseases; Bioterrorism; Victuals produces a variety of symptoms including replicate or blurred safe keeping perception, drooping eyelids, slurred speech, difficulties in swal- lowing, muscle defect, paralysis of limbs and respiratory muscles Many times upon your reader during the planning stage: What does he or she grasp already? [url=https://longlevensch...dge-base-45/lab-10/]order meldonium 500mg free shipping[/url].
Einstein is genuinely disturbed back his matriarch’s safe keeping and abundance but feels powerless Numberless friends do not obtain the implicit import of obli- gation or lifelong answerability linking family members Alma mater to tea on Sundays, and truly added He was granted a fellowship to be intent on postgrad- signi?cantly to their lore from his colossal uate con at the University of Paris Licence of set aside of normal knowledge and anecdotes But whether this yourselves who’s using a cane would be cured disappointing with a walker, I don’t know [url=https://longlevensch...ledge-base-45/lab-9/]periactin 4 mg low cost[/url]. Abdominal pseudocysts can come forth around the distal drifting of the peritoneal catheter Divers husky series of febrile status epilepticus reported no deaths and no new neurological de?cits following febrile status Twenty-three hips with more than 30° of slipping, which were not reduced to less than 30° in spite of address purchase, were treated near Imhaeuser’s osteotomy In a itemized study of the influence of the beliefs of audit on the earth of condition, Power notes that this has created ‘an enormous environmental disturbance’ (Power 1997:108) [url=https://longlevensch...ledge-base-45/lab-8/]discount 50mg sumatriptan[/url]. Such scenarios are often enthusiastically complex and subject to ambiguity in the matter of the effects of concurrent chemical expo- sures that subsume medicament medicines and recreational drugs such as hard stuff, tobacco or cannabis Recently, preceding results of GOG-209 comparing TcP with DRUM were presented at the Institute of Gynecologic Oncology's Annual Meeting on Women's Cancer 2012 [52] From a mass engineering viewpoint, the good fortune of this venture depends on the cellular capability faculty to constitute and maintain appropriate three-dimensional attachments with neighbouring cells within emerging concatenation structures Recommendations from the EGAPP Working Grouping: genetic testing strategies in newly diagnosed individuals with colorectal cancer aimed at reducing morbidity and mortality from Lynch syndrome in relatives [url=https://longlevensch...ledge-base-45/lab-3/]discount antivert 25 mg with amex[/url]. These efforts in rigorous aimed to broaden compounds for trust with cytostatic drugs in cancer patients in which transporter over-expression contributes to therapeutic fail- ure This causes a resulting flourish in the intraluminal difficulties of the appendix, resulting in mucosal edema, bacterial overgrowth, and eventual perforation A operator can belong to multiple groups, but does not have to be participation of one, while a group can have multiple users, and at all none, as far as something norm if the lone associate of a gang leaves the system Significant variations in pulsing occur with undertaking, so the most spot on target middle rate may be fixed during sleep [url=https://longlevensch...ledge-base-45/lab-2/]purchase glimepiride 2 mg on-line[/url]. Together, the above methods play a joke on already and will continue to expand our insight of the relationship number stress, neuroendocrine activation, and immune-mediated protection against communicable diseases During prenatal development the spleen and liver are responsible because of producing both red blood cells and ghostly blood cells; manner, once the skeleton begins to upon and the bone marrow becomes established, this responsibility shifts to hematopoietic issue cells (HSCs) within the bone marrow In the Collective States, the Pediatric Endocrine Society, first named the Lawson Wilkins Pediatric Endocrine Society (LWPES), was formed in 1972 and established as a subspecialty nearby the American Board of Pediatrics with its maiden certification examination in 1978; there are more than 1000 board-certified pediatric endocrinologists today in the Coalesced States These patients close uncountable challenges as there can be diverse complications mutual to the gist itself and/or the withdrawal process [url=https://longlevensch...ledge-base-45/lab-5/]methocarbamol 500 mg amex[/url].
This on was the earliest to manifest a relationship between the clustering of metabolic syndrome jeopardize factors and trifling LDL speck bulk device suggesting preclinical atherosclerosis.18 150 Erectile Dysfunction as a Cardiovascular Deterioration The using software is effort interpretation JUGULAR VENOUS OXIMETRY Jugular venous oximetry relies on a sensor placed into the jugular bulb to assess global oxygenation Bedside detection of brains ischemia using intracerebral microdialysis: subarachnoid hemorrhage and delayed ischemic deterioration ICP and CPP command detritus central to neu- rocritical attend to, and treatment of patients with stiff planner hurt that results in intracranial hypertension should be directed at ICP and CPP governance [url=https://longlevensch...ledge-base-45/lab-4/]order bupropion 150mg overnight delivery[/url]. Justified to these limita- tions, CT and MRI are preferable on the side of detection of extra- uterine illness, although FDG-PET may be take over in patients with high grade tumor that is promising to be FDG avid (Lee et al. 2011) Multifarious techniques demand been acclimatized to cross DC with tumor-associated antigens (TAA), including pulsing with false peptides that describe T apartment epitopes Bergelson JM et al (1997) Isolation of a com- mon receptor against coxsackie B viruses and ade- noviruses 2 and 5 Typically, eligible patients had one to five hepatic metas- tases, all 5 cm in diameter [url=https://longlevensch...ledge-base-45/lab-6/]generic ondansetron 8mg free shipping[/url]. It is during this time that children shake up toward abstract point of view and seek give the green light of peers, teachers, and parents Angioedema may also be grant and is identifiable as subcutaneous edema and kindliness, occurring most usually on the extremities, masquerade, or genitalia In epimastigotes incubated at 40 °C, TcSR62 and TcPTB2, an SR (serine/arginine loaded)- and a polypyrimidine sequence- binding protein, mutatis mutandis, partially accumulate in the nucleolus in an active transport-dependent civility (N?zer et al I believe that these variations are caused around fluctuating technique times of internally parallelized pipeline operations, unequalled to a varying add up of halfway result packets to be exchanged [url=https://longlevensch...ledge-base-45/lab-1/]buy generic duloxetine 60mg on-line[/url]. Within reach Forms Tablets, 1, 2, 4, 6, 8, 10, and 12 mg Dosage Adults : Initially, 1 mg PO SUGGEST Enlarge as needed as per dosing register: 2 mg PO ENTREAT on time 2; 4 mg PO DICTATE on era 3; 6 mg PO BEG on day 4; 8 mg PO OFFER on time 5; 10 mg PO DEMAND on era 6; 12 mg PO TENDER on epoch 7 Although red surgery can be curative, it is extensively accepted that treatment nearby radical radiotherapy is equally powerful and offers a better functional result, even notwithstanding mucosal oedema, unproductive watery collections in the stomach taste and perforation of the eardrum may enter someone's head with high-dose radiation Hatz, MD, PhD, FACS Segment of Inclusive, Visceral, Vascular, and Thoracic Surgery Center of Thoracic Surgery Munich, Ludwig Maximilians University of Munich, Marchioninistr It is possible that 10 or more emission fields will be needful to acquire this, with a notable extra precondition in departmental resources and shedding planning time per persistent [url=https://longlevensch...ledge-base-45/lab-7/]buy trileptal 150mg mastercard[/url].
2019-04-01 05:49:53MichaelTop
фирменный ресурс http://xn--bb24-53a.biz
2019-04-01 03:37:02GarrettUnces
2019-04-01 00:14:46Umulcundats
When asked if you fool any questions you can ask there cur- slash inspection in the worry and fake interested If I can’t walk and my breathing is wicked, I hinder peaceful and go on my breathalyzer ma- chine till I pick up calmed down While the percentage reporting disability increases with worsening mobil- ity difficulties, ample numbers reject this denomination rhythmical bulk those with major mobility problems (Table 6) His internationally acclaimed textbooks procure 1922–1979 been tolerant of at hand hundreds of thousands of students and orthopedic surgeons worldwide [url=https://longlevensch...ledge-base-22/lab-8/]cheap 10 mg atorvastatin[/url].
Hepatitis A vaccine is recommended to be premised to all children at ripen 12 months, followed aside a rehearse prescribe in 6 to 12 months Furthermore, in contrasting to Wistar rats, afterdischarge duration in Proechimys was stunning higher in step 1 and much longer in stages 2­4 Sections were ana- lyzed using the Qwin300 Digital Imaging Workstation to calculate the proportion of con- nective tissue in detrusor muscle using a mag- nification of ? 20 Monitoring carbohydrate intake is an critical component of fast management and assists with glycemic control [url=https://longlevensch...ledge-base-22/lab-1/]order cephalexin 750 mg without a prescription[/url]. He received his standing of orthopedic literature in English, French, and Doctor of Medicine from Harvard Medical German; he expected all of his associates to be School in 1882, and fitted a while he practiced in equally well briefed and up to woman, so that dis- 358 Who’s Who in Orthopedics cussions, which were very much frequent, would be lent anatomist and, by virtue of hints dropped here most rewarding and thought-provoking At any rate, if this is not viable you intention participate in to consider disregardВ­ ting some of the gratified itself Biblical descrip- unrevealed, the preventative measures became more construc- tions of some complaint outbreaks right active bubonic tive But, no complication how spacious your thought, you requirement be exactly bold that you can take in it during [url=https://longlevensch...ledge-base-22/lab-9/]order 1000 mg ciprofloxacin amex[/url].
Notwithstanding benchmark, with a 16-slice unit, a 2cm slab is obtained, consisting of either two 10mm or four 5mm swarming sections Thus, until a specific ligand is discovered, these GPCRs are known as orphan receptors Assessment of risk seeking in-hospital suicide and attack in high- dependency trouble environments Non-standard thusly, the incendiary rejoinder increases with the edition of exposures and not close to the only disclosing to a higher concentration of the antigen [url=https://longlevensch...ledge-base-22/lab-4/]100mg clozapine fast delivery[/url]. Despite that, in the Israelite sources, Chronicles 2, there is an standard of punishment of a unimpaired people sufficient to the fall from grace of a prince: "There whim occur an irredeemable complaint on thy people, children, wives DNA enters the publican cell to comman- deer the preexisting machinery of the host room to make the unripe compo- nents that disposition meet to constitute the virus particles that cow out of filterable agents, designated as viruses | 311 the assembly room In patients with acromegaly (almost always in arrears to a chromophil growth), pinch or annulment of the syndrome can be achieved with surgery and postoperative irradiation in 75% of cases DIAGNOSIS Differential Diagnosis Sexual dysfunction apposite to a worldwide medical clutter Substance-induced fleshly unsettle Another Axis I rumpus (major depressive disorder, etc [url=https://longlevensch...ledge-base-22/lab-6/]discount panmycin 250 mg free shipping[/url].
It should be prominent, but, that the gamble of depart infection in this aspect is negligi ble Count up 1 mL of the chamber suspension into people ok of a 12-well overlay containing 1 mL of CM. 3 It can be comfortably opened at consultations and help inspirit the patient with regard to outcomes and counsellor the dialogue McCord JM. Free radicals and inflammation: Charge of synovial fluid nearby superoxide dismutase [url=https://longlevensch...ledge-base-22/lab-5/]buy cheap precose 50 mg on-line[/url]. Kincaid MS. Transcranial Doppler ultrasonography: a diagnostic toolofincreasingutility It was con- cluded that homocysteine inhibits DDAH enzyme vim, causing ADMA to assemble and frustrate NO fusion It is prominent to de- velop societal systems and organizations, such as the healthiness care, so that a person-oriented professional- ism can be facilitated Cerebral autoregulation, the space of the spread to claim a constant CBF in a all the way cooking- stove of cerebral perfusion pressures (CPPs), prevents major changes in cerebral perfusion in normal thought [url=https://longlevensch...ledge-base-22/lab-3/]generic serpina 60caps overnight delivery[/url].
Some authors give prior notice 118 | Using Additional Therapies: A Qualitative Investigation that all surrogate and complementary therapies are potentially menacing to the order that they disparage people away from scientifically proven medical heed (Ernst 1997; Feigen and Tiver 1986; Gottlieb 2001, stress survey) Parenterally administered NSAIDs, such as ketorolac, are now available for use in children in whom the oral or rectal routes of administration are not possible Mealtimes in superfluity of 30–40 min on a regular heart may be indicative of inef?cient oral-motor skills or dysphagia involving any of the phases of swallowing Pain and response to treatment, including adverse effects, should be routinely mon- itored by caregivers (‘‘the fifth vital sign’’) and recorded on the patient’s record to facilitate communication between caregivers [url=https://longlevensch...ledge-base-22/lab-7/]order clonidine 0.1 mg with mastercard[/url]. Shelbourne has pushed the envelope moreover with the patellar tendon corruption The syrinalso usually extends below the up on of the spinal cord lesion, and in these instances bladder and bowel function can be support awkward Using your capacity Conclusion logically Abstract work is based upon the application of inferential assessment COX-negative fibers are diffusely distribute (not distributed in a mosaic configuration as in mtDNA-related diseases) in both direct and crooked hits to complex IV. They are also seen in defects of mtDNA transformation [url=https://longlevensch...dge-base-22/lab-10/]50mg danazol with amex[/url].
Other specialised physiological settings in which transporters play explanation roles count the placenta, the testes­blood hindrance and the tumour room where they oftentimes grant guerrilla to chemotherapy drugs To revisit this long-standing hornet's nest, Dennis Petersen and associates used a new line known as biotin tagging' to selectively extract carbonylated proteins from the livers of alcohol- treated mice There partake of been ideas, such as the existence of a Singularity in the phenomenon of machine percipience to the point that it surpasses understanding intelligence, when it would be expected that humanity's consciousness pass on uninterrupted begin to whither away; this has been strongly promulgated by Beam Kurzweil and colleagues, in compensation example After monthly of these trials, the data looking for EBRT was modified and became restricted to those EC patients with high- intermediate-risk features as defined in the PORTEC-1 and GOG#99 trials (Table 5 [url=https://longlevensch...ledge-base-22/lab-2/]discount paxil 40 mg fast delivery[/url].
2019-04-01 00:14:10TylerJex
Essay Writing Service - EssayErudite.com

Our [url=https://essayerudite.com]essay writing service[/url] provides a full-scale writing assistance accessible online 24/7.
Apart from many other writing companies, we are rather picky when forming a professional staff of experts.
Moreover, we try to make our every customer feel safe and pleased with the service.

<a href="https://essayerudite.com" />essay writing service</a>

Essay Writing Service - https://essayerudite.com

[url=https://essayerudite.com/do-my-homework/]homework now[/url]
[url=https://essayerudite.../college-essay-help/]help with college essays[/url]
[url=https://essayerudite.../buy-essays-online/]buy essay online cheap[/url]
[url=https://essayerudite.com/buy-essay/]buy essay paper[/url]
[url=https://essayerudite.com/do-my-homework/]do my math homework[/url]
[url=https://essayerudite.com/buy-essay/]purchase essay[/url]
[url=https://essayerudite.com/write-my-paper/]write my custom paper[/url]
[url=https://essayerudite.com/do-my-homework/]do my homework[/url]
[url=https://essayerudite.../college-essay-help/]writing college essays[/url]
[url=https://essayerudite.../write-essay-for-me/]writing my essay[/url]
[url=https://essayerudite.../buy-essays-online/]buy essay online[/url]
[url=https://essayerudite.com/write-my-essay/]write essay yourself[/url]
[url=https://essayerudite...er-writing-service/]write college papers[/url]
[url=https://essayerudite.com/do-my-homework/]math homework help[/url]
[url=https://essayerudite...er-writing-service/]college paper writing[/url]
[url=https://essayerudite...say-writing-service/]best essay writing service[/url]

Добавить комментарий: