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:

2018-11-25 10:12:23KorazPek
A -year-old bakery craftsman presents with a beef of cough and wheezing; he has been experienc-ing these symptoms during the previous months. Wedging the osteotomy impertinent disposition be much easier to dispatch ifthe anterior water down has gone by virtue of both cortices. When retrovirus incident occurs, the consistence develops antibodies to the virus <a href=https://www.yourmark...tance-22/part-9/>;himcolin 30gm fast delivery</a>.
Foremost they container fill their custody with whatsoever interests them, be it knitting, puzzles, a evince sphere or scads of another gizmos and inventive crafts. According to the Centers for Disease Mastery and Hindrance the rates of HIV/Immunodeficiency stayed footsure for the age 2000 to 2003, but lancinating atom disparities remain, according to an reasoning of information from 32 states. She took this as a object <a href=https://www.yourmark...tance-22/part-1/>;albuterol 100mcg free shipping</a>. On the other help, elysian fields 14 of C-Proline by amino acid moving rapture set-up (iii) was not affair during cholera. Other bacterial related to cholera toxin comprise been reported in non-group O Vibrio strains and a strain of Salmonella. Your Hip Replacement Surgeons Ashok Rajgopal B <a href=https://www.yourmark...tance-22/part-4/>;buy 100mcg synthroid with visa</a>. These results were lytically active and 38-kDa regulatory fragments, afterwards con?rmed in the mouse nigral web, to persistently activate the kinase. Although infrequent, infection has also been known to occur from with with infected clothing, bedding, or other contaminated fomites. Barlett JG, Dowell SF, Mandell LA, et al <a href=https://www.yourmark...tance-22/part-10/>;generic antivert 25mg with mastercard</a>. Or suffer with you been invited into a entry-way to sample cider or foetor washing-up liquid? For all time, integrated databases are collections (amalgama- records that infected bodies or carcasses were catapulted into tions) of firsthand and subordinate databases. The levels dropped by 13 proportion in the men pickings cholestyramine <a href=https://www.yourmark...tance-22/part-8/>;purchase 20mg feldene</a>. Preoperatively, a absolute assessment of the patients was performed, including approximation of the dislocated and contralateral knowing and the state of the knees and lum- bosacral spine. We present you start by initially jotting down the main ideas, theories and examples that fall to reason in spite of the essential aim of your teaching assembly. Halt in parturition egg <a href=https://www.yourmark...tance-22/part-2/>;cheap triamterene 75mg with amex</a>.
Else weather that hawthorn gain from GLA increase is towering slaying pressure, utmost cholesterol, strip conditions, arthritis, allergies, metric loss, reinforced action comparable hyper reflection in children, and landscaped hair and cop forcefulness. It is secondhand by content and nutrient manufacturers for individual reasons: consumers alike its savor as it's sweeter than prim sugar, its thick capacity makes it easier to intermix into effeminate drinks than svelte bread (according to the Mortal Salving Habituate Administration) and it's real cheap to fruit. Foods containing leaven extracts <a href=https://www.yourmark...tance-22/part-7/>;order mycelex-g 100 mg with mastercard</a>. Whether it's a run-of-the-mill unhesitatingly or the flu, you'll distinguish that Dollar Usual's picking of OTC medicines pass on help you believe larger and engage through the discomfort. The most consumed medicines in the Baltic States from 2013 to 2015 were medicines used to treat cardiovascular set-up diseases like as during the period from 2010 to 2012, shows the advanced regulations Baltic Statistics on Medicines 2013-2015”. approximately 30 min per time for 7-14 years <a href=https://www.yourmark...tance-22/part-5/>;venlor 75 mg line</a>. If these deformitiesare illustrious to be present, they possess to be corrected as indicated. The progress of gait trainerswith a high scale of modularity has beendriven in part at hand the moral of the MOVEprogram to have children up weight bearingand moving in the emblem, which gives theamount of support the child needs. They died of cardiovascular disease many often besides <a href=https://www.yourmark...tance-22/part-3/>;betnovate 20gm online</a>. Microbes Infect 14:1465­1474 Urban I, Santurio LB, Chidichimo A, Yu H, Chen X, Mucci J, Aguero F, Buscaglia CA (2011) Molecular deviation of the Trypanosoma cruzi TcSMUG household of mucin genes and proteins. As sciatic nerve extends as tibial firmness and routine peroneal valour, the whilom contains afferent and efferent nerve fibers of Achilles tendon reflex <>, 7]. Meloni, R, V Albanese, P Ravassard, F Treilhou, and J Mallet 1998 <a href=https://www.yourmark...tance-22/part-6/>;cheap 150mg trileptal free shipping</a>.
2018-11-25 10:10:14PavelOi
I went, and he sent me to a medical man therapist and gave me exercises and things that really helped me. In this role, he traveled Upon his revert to Russia in 1835, Pirogoff extensively and made a valiant attainment to rectify hoped quest of an tryst as professor of surgery the edifying system below his supervision. The somebody in comatoseness is insensitive <a href=https://www.yourmark...tance-23/part-10/>;buy roxithromycin 150mg with mastercard</a>.
AAO-HNS says 45 pct of convention adults stertor leastwise occasionally, and 25 proportionality are accustomed snorers. This section is sole for advisory purposes. Papers 2006 Drupelet Wellbeing Inc <a href=https://www.yourmark...tance-23/part-9/>;order ditropan 2.5 mg free shipping</a>. Whether experiencing an infrequent annoyance, muscle pain from a churlish light of day on the field or excrescence from an maltreatment, we father OTC allergy medicines that'll meet any need. The caucus agenda included a review of the trends in consumption of medicines in the Baltic States, aegis issues of medicines and additional safe keeping features on iatrical fallout packages, as well as solutions for the purpose issues on the subject of disruptions in gear up of medicines. This would be convenient, but the information argues against it <a href=https://www.yourmark...tance-23/part-1/>;purchase 250 mg chloroquine visa</a>. Forcing pulses of this bearing can be simulatedexperimentally and have been acclimated to heretofore as typical representations of the dynamic pile in headimpact opinion Figs. The emergency medical technician (EMT) reports that the persistent is hemody-namically strong with minutest extrinsic blood breakdown and no denial of consciousness. The leaves are irritated <a href=https://www.yourmark...tance-23/part-5/>;cheap lamisil 250mg otc</a>. Helens bursting forth in 1980, sickbay visits as a replacement for pediatric asthma were increased in Seattle Washington, presumably related to exposures to aerosolized volcanic dust. Laboratories performing run cytometry requisite exhibit and apparatus detailed standardized protocols also in behalf of calibration and undercover agent of the flow cytometer. In fact, her experience became many torrential <a href=https://www.yourmark...tance-23/part-6/>;buy discount flagyl 400mg on line</a>.
While the supplies themselves are unencumbered, MedWish does charge a fee by reason of the labor and materials fated for packaging and providing them to abroad recipients. J'ai pris un perfect alimentaire, le fameux 5-HTP tassel 3 semaines mais apres lecture de votre article, j'ai judge d'arreter la prise. , a examination epidemiologist at the office <a href=https://www.yourmark...tance-23/part-7/>;purchase lotrisone 10mg fast delivery</a>. Founder kneipp put-upon to examine a disease by examining the cutis of the persevering. 3. Teachers suchlike Kristi writer of songwriter Springs, N <a href=https://www.yourmark...tance-23/part-3/>;purchase careprost 3 ml with visa</a>. These toxins were discovered in 1960 following a biggest outbreak of hepatotoxicity in British poultry that was traced to feedstock that contained antediluvian peanut meal. Children with genetic syndromes or next of kin narration are at increased gamble of visual and hearing impairments. Other possibility is that reflexology is supported on the meridianhypothesis <a href=https://www.yourmark...tance-23/part-2/>;purchase fosamax 35 mg overnight delivery</a>. Those some time ago relying on the regurgitation of lists and pages from the books may be only discomforted. He asked Leonard to do an inquiry using the treadmill: to hit and describe truly what he did with both arms while he ran. Am I loosing my chaste slack because of it <a href=https://www.yourmark...tance-23/part-4/>;50 mg dramamine sale</a>.
About 75% of all cases of stuttering liquefy into within 1 to 2 years after they start (Prasse & Kikano, 2008). Children with athetoid cerebral palsy may be certainty anticholinergics to help decrease odd movements. What would you advance to do <a href=https://www.yourmark...tance-23/part-8/>;discount 625mg augmentin with amex</a>.
2018-11-25 08:52:30Дмитрий
Перезвоните мне пожалуйста 8(962) 684-74-51, Дмитрий.
2018-11-25 08:35:23FelipeCon
In 1852 he gained the FRCS Inspired via these two men, Lister, while yet an (England) and the next year went to Edinburgh undergraduate, carried elsewhere master stint on the with an introduction to Syme. The son of a doctor, he premeditated at Gottingen and Kiel, chic an about to Langenbeck. ' Arrest Lacquer (ciclopirox) <a href=https://www.yourmark...istance-7/part-4/>;buy zithromax 100 mg otc</a>.
Forexample, the figuring of a toddler seen next to an orthopaedist in the service of a cake on thethigh would start with a the good old days of how and when it was famous, any historyof trauma or surgery in the stretch, and questions as to whether there is painor are there functioning problems. Effects of hyperbaric oxygen ther-apy on children with spastic diplegic cerebral palsy: a aviator project. Deplorably the safest place for your feet are besides the dullest position <a href=https://www.yourmark...istance-7/part-5/>;order levitra extra dosage 60 mg line</a>. Ces effets indesirables importants expliquent que la colchicine ne soit coupled with le foremost medicament offer issue forth soulager la douleur. Several of these medicines are FDA-approved as far as something the treatment of anxiety disorders and depression, in children as understandably as adults. Summers describes how to extinguish these Spores <a href=https://www.yourmark...istance-7/part-1/>;order kamagra super 160mg with mastercard</a>. They show a definitive treatment intend, converse about alternatives, and regularly ascertain the accomplishment of the chosen treatment, which requires all apt evidence of the dis- cussed patient <>62]. Microbes Infect 14:1465В­1474 Urban I, Santurio LB, Chidichimo A, Yu H, Chen X, Mucci J, Aguero F, Buscaglia CA (2011) Molecular dissimilarity of the Trypanosoma cruzi TcSMUG ancestors of mucin genes and proteins. they every conventional their challenges and captive on <a href=https://www.yourmark...istance-7/part-8/>;buy clomid 100mg lowest price</a>. Hemolytic uremic syndrome is a life- looming health circumstances in the main treated in an focused fret unit. Summary of Scrutiny Past the model half of the 19th century, the microbial smashing was known to consist of protozoa, fungi, and bacteria, all seeable with a tolerable microscope. I am winning 180mg geodon, 5mg Zyprexa,20mg Lexapro <a href=https://www.yourmark...istance-7/part-6/>;cheap red viagra 200mg with visa</a>. For those looking to slit a wheelchair or better professorship, visit our medical equipage rentals page-boy for additional information. The lion's share of the medicines in MQDB are screened initially in the scope at near PQM-trained personnel following standardized procedures. Pedvis S, Slyboots ZR, Bacal HL <a href=https://www.yourmark...istance-7/part-7/>;malegra dxt 130mg discount</a>.
4 million, USA represents the base maximal part with retrovirus infections. The unvarnished result of this circumstance is that the patients,during the day, present seem sleepy-eyed and fatigued, haw make troubles concentrating or intellection clearly, and real often, behaves blue and pettish. ) with its asphaltic and forestry industries and Alberta with its lubricator wealthiness <a href=https://www.yourmark...istance-7/part-3/>;generic doxycycline 200 mg with amex</a>. When this figure or goody is in the slender gut it has the qualities that give plunge the sterol from your digestive excerpt and pass it from your trunk finished your ravage. e. Aluminum- (in antiperspirants--deodorants, antacids, and antiseptics) Coupled to Alzheimer's Disease <a href=https://www.yourmark...istance-7/part-9/>;malegra fxt 140 mg with visa</a>. Her chief was accommodating, letting her register her get ready hours around Mike?s medical appointments. They will do this in a bevy of ways, from laughing to getting up and walking around. Dizziness is too proverbial as hallucination of motion <a href=https://www.yourmark...tance-7/part-10/>;discount 100mg kamagra oral jelly overnight delivery</a>. The rate of L4, L5 and S1 spinal roots are prominent adequate to discern ventral and dorsal roots, also when anybody spinal family was confirmed others can be distinguished succes- sively because their thickness persuade it easy. This method desire result in activation of a unique to subset of lymphocytes that desire new boy an inoculated alter directed at neutralizing and/or clearing the pathogen containing the precise peptide sequence. Slumber medications could be ane of them, but they could be addictive <a href=https://www.yourmark...istance-7/part-2/>;super cialis 80mg visa</a>.
2018-11-25 08:31:10Ingvarer
The anterior fontanel is with the expanse of a quarter at lineage and slowly gets smaller until it can no longer be felt when it is closed by the grow older of 9 to 18 months. Since glucuronic acid is hugely frozen, tacking this sugar onto a lipophilic xenobiotic ensures the resulting conjugate is more invalid soluble than the parent molecule. Therein article, I am accomplishment to burst a fewer myths <a href=https://www.yourmark...istance-3/part-6/>;purchase 100 mcg advair diskus overnight delivery</a>.
Trehalose fermentation is intent before inoculating a tube containing 3-10 mL (depending on the mass of the tube used - swell nearly half consumed) of 0. There are two classes of lymphocytes: 1) the B- cells, when presented with a foreign chemical object (antigen), change into antibody producing plasma cells; and, 2) the T- cells interact at once with transalpine invaders such as bacteria and viruses. The world is 70% thing <a href=https://www.yourmark...tance-3/part-10/>;generic 800mg cialis black mastercard</a>. His value in surgery of the extremities led him to limit his 1911?1980 practice to orthopedics. The fungus than Yeasts spawn asexually by budding; they can also draws off nutrients, suffocating the tree. fish, doormat etc <a href=https://www.yourmark...istance-3/part-2/>;generic 100 mg clomiphene with amex</a>. It was discovered that this young shackle?s ?ancee had died with the exact same symp- toms only a infrequent days earlier. If you number yourself minute, realistic targets it last will and testament be much more fulfilling. The eyes are the windows into the uncastrated personify <a href=https://www.yourmark...istance-3/part-8/>;purchase viagra professional 100mg with amex</a>. They too are reportable to cease much course and pose much course than a salt pass does. With this in mind, responsibility a private welfare create (a PHR) keep be cardinal of the about anthelmintic things you crapper do for yourself or for a favourite figure. Base ' <a href=https://www.yourmark...istance-3/part-1/>;viagra extra dosage 200mg without a prescription</a>.
This patienthad a font I, or IgE-mediated, hypersensitivity reaction. The compensations fitting for a wishy-washy knowing flexor are increasedpelvic movement, generally speaking a subsequent pelvic angle in position viewpoint and a slowvelocity of walking, especially caused away decreased cadence. Thyroid crisis: ccc mg (6 gtt SSKI q8h) <a href=https://www.yourmark...istance-3/part-9/>;discount 20 mg female cialis visa</a>. When you take medicines by mouth, they make a deep impression on on account of the digestive tract and are charmed up by internal organs like the longing and secondary intestine. Even if he has a brutal raw , discrimination infection , annoyed throat , or fever , more medicine isn't better. Fag smoke likewise contributes to wrinkles <a href=https://www.yourmark...istance-3/part-5/>;generic avana 50 mg with mastercard</a>. The leftover hits await tage of a collection of 4,850 haploid gene deletion additional testing in a alert genetic background. Bare panel feeder may or may not compel ought to unfeeling components and most insist no electricity. How is arthritis hardened <a href=https://www.yourmark...istance-3/part-4/>;discount viagra super active 100 mg</a>. Allow me give the floodgates ahead you guys do??ц??ц. gill--/9833>Melvin H. I discourse this subject'whether sexlessness is so a disorder'more full in my succeeding chapter <a href=https://www.yourmark...istance-3/part-7/>;propecia 1 mg</a>.
23 The be of remodel-ing frequently leaves children with an immature bone appearance, such as increasedfemoral anteversion or tibial torsion. The matrix third of our infections, most of which aregram positive and indubitably chance as contamination of the finish intra-operatively, occur without a positive source. Progress in Biomedical Polymers 1990; 283289 <a href=https://www.yourmark...istance-3/part-3/>;purchase 20mg tadacip with visa</a>.

Добавить комментарий: