Arthur Dimenstein / Articles / Reviews / Обзоры и тесты фотообъективов (более 100 моделей)

Обзоры и тесты фотообъективов (более 100 моделей)

Коллеги, ниже список с прямыми линками на обзоры, тесты и сравнения различных объективов. Название объектива является ссылкой на американский интернет-магазин bhphotovideo, если такой объектив есть в продаже. Я старался проверить все ссылки, но в таком объеме информации вполне могли появится ошибки. Если вы найдете их, шлите свои исправления и замечания мне на e-mail - буду исправлять. Вторая просьба: если у вас есть ссылки на обзоры или тесты объективов, которые здесь не были упомянуты, буду благодарен за ваши подсказки.

Заранее спасибо всем!

ОГЛАВЛЕНИЕ:
ПОЛЕЗНЫЕ ЛИНКИ:

Объективы Canon EF
http://www.findlens.info/

Объективы Canon EF-S
http://www.whichlens.com

Объективы Sigma
http://www.photozone.de/

Объективы Tamron
http://www.bobatkins.com/photography/reviews/

Объективы Tokina
http://www.slrgear.com/reviews/index.php

Объективы прочих брэндов http://etischer.com/

НАВЕРХ

CANON EF-S серия для APS-C dSLR.

Canon EF-S 10-22/3.5-4.5 USM
http://www.luminous-landscape.com/reviews/lenses/Canon-10-22mm-test.shtml
http://www.the-digital-picture.com/Reviews/Canon-EF-S-10-22mm-f-3.5-4.5-USM-Lens-Review.aspx
http://www.photozone.de/8Reviews/lenses/canon_1022_3545/index.htm

Canon EF-S 17-55/2.8 USM IS M
http://www.photozone.de/8Reviews/lenses/canon_1755_28/index.htm

Canon EF-S 17-85/4-5.6 IS USM
http://www.the-digital-picture.com/Reviews/Canon-EF-S-17-85mm-f-4-5.6-IS-USM-Lens-Review.aspx
http://www.photozone.de/8Reviews/lenses/canon_1785_456_is/index.htm
http://www.luminous-landscape.com/reviews/cameras/20d-location.shtml

Canon EF-S 18-55/3.5-5.6 II
http://www.photozone.de/8Reviews/lenses/canon_1855_3556/index.htm
http://www.the-digital-picture.com/Reviews/Canon-EF-S-18-55mm-f-3.5-5.6-Lens-Review.aspx
http://www.etischer.com/300d/lenstests/28mm/test.html (Sigma 12-24mm f/4.5 - 5.6 vs Tamron 28-75mm f/2.8 vs Canon EF-S 18-55mm)

Canon EF-S 60/2.8 Macro USM
http://www.the-digital-picture.com/Reviews/Canon-EF-S-60mm-f-2.8-Macro-USM-Lens-Review.aspx
http://www.photozone.de/8Reviews/lenses/canon_60_28/index.htm

НАВЕРХ

SIGMA (http://www.sigmaphoto.com/lenses/lenses_all.asp)

Большая часть сокращений описана по русски здесь: (http://sigmalens.ru/technology.php)

ASP
Aspherical lenses. Lens elements that are not spherical can reduce the total number of elements required in a lens design. They can deliver better performance while reducing weight and size.

APO
These lenses use apochromatic design and Special Low Dispersion glass (SLD) for minimum color aberration and ultimate telephoto image quality, improving contrast and sharpness.
HSM HyperSonic Motor. Enables virtually silent, highly responsive auto and manual focusing, as well as manual focus only override.

UC
Ultra Compact. The smallest, lightest lens of its type available.

DL
Deluxe. DL lenses are full feature lenses in spite of their modest price. Like other Sigma lenses, they are supplied with a custom lens hood and feature half-stop increments on manual aperture settings, depth of field scale, distance scale, infrared correction mark.

DF
Dual Focus. It is easy to hold the lens, since the focusing ring does not rotate during auto-focusing and yet provides adequate focusing torque of the focusing ring during manual focusing of the lens.

HF
Helical focus. This system of the lens eliminates front lens rotation, thus allowing the use of a Perfect Hood and easy to use polarizing filter

RF and IF
Internal and Rear Focusing. Conventional automatic focusing is done by moving either the entire lens system or just moving the front lens group. For our telephoto and telemacro lenses, Sigma developed an internal focusing system that moves lens groups inside the lens barrel, significantly improving macro capabilities. For super wide-angle lenses with large front diameters, we created a rear focusing system that moves only the rear lens group. For our mid-range lenses, we use an internal focusing system that moves inner lens groups to allow a shorter minimum focusing distance. All while retaining a constant physical lens barrel length.

DG
The DG designation applied to certain newer Sigma lenses (mostly wideangle and wide zoom type lenses) indicates that the lens is especially suited for use with digital SLR cameras. The DG lenses feature improved (more even) light distribution from image center to edge, especially at maximum aperture, compared to conventional fast wideangle lenses. This is important in digital photography, but is also useful in 35mm photography, especially when slide film is used. Also, the shorter focal lengths are desirable, because most digital SLR cameras have image sensors whose dimensions are considerably smaller than a 35mm negative (usually by a factor of 1.3X to 1.7X), making the lens’ angle of view equivalent to that of a longer lens on a 35mm cameras.

DC
Digital APS-C lenses.

EX
Excellence. These professional type lenses feature the distinctive EX finish and EX logo on the lens barrel.

OS
Optical Stabilizer.

Sigma 1.4x Tele Converter
http://www.prime-junta.net/petteri/pont/Reviews/de_TC_vs_TC/a_Tamron_vs_Sigma_1.4x.html

Sigma 2x EX APO Tele Converter
http://d33pblue.net/equipment.html (нет прямой ссылки, все свалено на одну страницу)

Sigma 10-20/4-5.6 HSM EX DC
http://www.photozone.de/8Reviews/lenses/sigma_1020_456/index.htm

Sigma 100-300/4 EX HSM APO
http://www.photozone.de/8Reviews/lenses/sigma_100300_4/index.htm

Sigma 105/2.8 EX DG Macro
http://orchideen-kartierung.de/Macro100E.html (на немецком, но картинки говорят сами за себя)
http://www.photozone.de/8Reviews/lenses/sigma_105_28/index.htm

Sigma 12-24/4.5-5.6 EX DG HSM ASP (подходит и для пленки)
http://www.prime-junta.net/petteri/pont/Reviews/a_Sigma_12-24_f4.5-5.6/a_Sigma_EX_12-24_f4.5-5.6.html
http://www.photozone.de/8Reviews/lenses/sigma_1224_4556/index.htm
http://www.etischer.com/300d/lenstests/28mm/test.html (Sigma 12-24mm f/4.5 - 5.6 vs Tamron 28-75mm f/2.8 vs Canon EF-S 18-55mm)
http://etischer.com/300d/sigma12mm.html
http://www.etischer.com/1dmk2/lenstests/12mm/test.html (Sigma 12-24mm f/4.5 - 5.6 @ 12mm)
http://www.etischer.com/1dmk2/lenstests/17mm/test.html (Sigma 12-24mm f/4.5 - 5.6 vs Canon 17-40mm f/4L @ 17mm)
http://www.etischer.com/1dmk2/lenstests/20mm/test.html (Sigma 12-24mm f/4.5 - 5.6 vs Sigma 20mm f/1.8 vs Canon 17-40mm f/4L @ 20mm)
http://etischer.com/300d/canon28f18.html (Canon 28mm f/1.8 vs Canon 17-40 f/4L vs Sigma 12-24mm f/4.5 - 5.6)
http://www.etischer.com/1dmk2/lenstests/Canon_16-35mm/ (Canon 16-35L f/2.8L vs Sigma 12-24mm f/4.5-5.6 vs Sigma 20mm f/1.8 vs Tamron 28-75mm f/2.8)

Sigma 24-135/2.8-4.5 ASP IF
http://www.sigma-photo.co.kr/review/24-135/prologue.htm (на корейском, но фотографии очень наглядные)

Sigma 24-60/2.8 EX DG
http://www.sigma-photo.co.kr/review/24-60/24-60-01.htm (на корейском, но фотографии очень наглядные)

Sigma 24-70/2.8 EX DG DF Macro
http://d33pblue.net/equipment.html (нет прямой ссылки, все свалено на одну страницу)
http://www.tawbaware.com/sigma_tokina_test1.htm
http://www.sigma-photo.co.kr/review/28-70-new/01.htm (на корейском, но фотографии очень наглядные)

Sigma 28/1.8 EX DG ASP Macro
http://www.sigma-photo.co.kr/review/28/prologue.htm (на корейском, но фотографии очень наглядные)
http://etischer.com/300d/sigma28f18.html (подробные тестовые снимки)

Sigma 28-105/3.8-5.6 UC-III ASP IF
http://www.sigma-photo.co.kr/review/28-105/prologue.htm (на корейском, но фотографии очень наглядные)

Sigma 28-200/3.5-5.6 ASP Macro
http://www.sigma-photo.co.kr/review/28-200/prologue.htm (на корейском, но фотографии очень наглядные)
http://www.slo-foto.net/reviews-56-page1.html (сравнение с Sigma 70-200 F2.8 HSM EX, Canon 70-200 F4 L USM, Canon F2.8 L USM, Canon 75-300 IS III and Olympus 50-200 ED)

Sigma 28-300/3.5-6.3 Macro
http://www.sigma-photo.co.kr/review/28-300/01.htm

Sigma 28-70/2.8 EX DG
http://www.whichlens.com/index.php?blog=5&title=tamron_28_75mm_f_2_8_xr_di_vs_sigma_28_7&more=1&c=1&tb=1&pb=1

Sigma 30/1.4 EX DC HSM
http://www.whichlens.com/index.php?blog=5&title=sigma_30mm_ex_dc_f1_4_vs_canon_ef_35mm_f&more=1&c=1&tb=1&pb=1
http://www.sigma-photo.co.kr/review/30/01.htm (на корейском, но фотографии очень наглядные)
http://www.photozone.de/8Reviews/lenses/sigma_30_14/index.htm

Sigma 400/5.6 HSM APO macro
http://www.photozone.de/8Reviews/lenses/sigma_400_56/index.htm

Sigma 50/2.8 EX DG Macro
http://orchideen-kartierung.de/Macro100E.html (на немецком, но картинки говорят сами за себя)
http://www.photozone.de/8Reviews/lenses/sigma_50_28/index.htm

Sigma 50-500/4-6.4 EX DG HSM
http://www.photozone.de/8Reviews/lenses/sigma_50500_463/index.htm

Sigma 55-200/4-5.6 DC
http://www.photozone.de/8Reviews/lenses/sigma_55200_456/index.htm

Sigma 70-200/2.8 EX DG APO HSM
http://d33pblue.net/equipment.html (нет прямой ссылки, все свалено на одну страницу)
http://www.photozone.de/8Reviews/lenses/sigma_70200_28/index.htm
http://www.sigma-photo.co.kr/review/70-200/prologue.htm (на корейском, но фотографии очень наглядные)
http://www.slo-foto.net/reviews-56-page1.html (сравнение с Sigma 28-200/3.5-5.6, Canon 70-200 F4 L USM, Canon F2.8 L USM, Canon 75-300 IS III and Olympus 50-200 ED)

Sigma 70-300/4-5.6 DG APO Macro
http://www.sigma-photo.co.kr/review/70-300/prologue.htm (на корейском, но фотографии очень наглядные)
http://www.photozone.de/8Reviews/lenses/sigma_70300_456/index.htm

Sigma 8/4 EX CIRCULAR FISHEYE
http://www.sigma-photo.co.kr/review/8/prologue.htm (на корейском, но фотографии очень наглядные)

Sigma 80-400/4.5-5.6 EX APO OS
http://www.photozone.de/8Reviews/lenses/sigma_80400_4556os/index.htm
http://www.worldisround.com/articles/28564/index.html

НАВЕРХ

TAMRON (http://www.tamron.com/lenses/default.asp)

IF
Internal Focusing

ZL
Zoom Lock

SHM
Super Hybrid Mount (композитный облегченный байонет)

ASL
Aspherical

LD
Low Dispersion

AD
Anomalous Dispersion

HID
High Index High Dispersion

XR
Extra Refractive Glass (Сокращает размер объектива, позволяет сохранять относительное отверстие диафрагмы при уменьшении диаметра линзы и длины объектива)

Di
Digitally Integrated Design

Di-II
Lenses for Digital SLR Cameras Only

SP
Super Performance (улучшенная серия, аналог EX у Sigma)

Tamron 1.4x Tele Converter (Не путать с Tamron SP 1.4x Tele Converter)
http://www.bobatkins.com/photography/reviews/tcs.html
http://www.prime-junta.net/petteri/pont/Reviews/de_TC_vs_TC/a_Tamron_vs_Sigma_1.4x.html
http://d33pblue.net/equipment.html (нет прямой ссылки, все свалено на одну страницу)

Tamron 2x Tele Converter (Не путать с Tamron SP 2x Tele Converter)
http://d33pblue.net/equipment.html (нет прямой ссылки, все свалено на одну страницу)
http://www.bobatkins.com/photography/reviews/tcs.html

Tamron SP AF11-18/4.5-5.6 SP Di-II LD ASPHERICAL (IF)
http://www.bobatkins.com/photography/reviews/tamron_11-18.html
http://www.photozone.de/8Reviews/lenses/tamron_1118_4556/index.htm

Tamron SP AF17-35/2.8-4 SP Di LD Aspherical (IF)
http://www.bobatkins.com/photography/reviews/tamron_17_35_review.html
http://www.whichlens.com/index.php?blog=5&title=canon_17_40mm_f_4l_usm_vs_sigma_17_35mm&more=1&c=1&tb=1&pb=1.
http://www.whichlens.com/index.php?blog=5&title=tamron_sp_af17_35mm_f_2_8_4_di_ld_aspher&more=1&c=1&tb=1&pb=1
http://www.photozone.de/8Reviews/lenses/tamron_1735_284/index.htm

Tamron SP AF17-50/2.8 XR Di II LD Aspherical (IF)
http://www.photozone.de/8Reviews/lenses/tamron_1750_28/index.htm

Tamron AF18-200/3.5-6.3 Di II LD Aspherical (IF) XR macro
http://www.photozone.de/8Reviews/lenses/tamron_18200_3563/index.htm

Tamron 180/3.5 Di LD IF Macro
http://orchideen-kartierung.de/Macro100E.html (на немецком, но картинки говорят сами за себя)

Tamron 200-500/5-6.3 SP Di LD IF
http://www.bobatkins.com/photography/reviews/tamron_200_500.html
http://www.photozone.de/8Reviews/lenses/tamron_200500_563/index.htm

Tamron 24-135/3.5-5.6 AD ASL IF Macro
http://www.photozone.de/8Reviews/reviews/tamron24135.htm (сравнение с Canon EF24-85/3.5-4.5 USM и EF28-135/3.5-5.6 USM IS)
http://www.photozone.de/8Reviews/lenses/tamron_24135_3556/index.htm

Tamron 28-75/2.8 XR Di LD Aspherical (IF)
http://www.bobatkins.com/photography/reviews/tamron_28_75.html
http://www.whichlens.com/index.php?blog=5&title=tamron_28_75mm_f_2_8_xr_di_vs_sigma_28_7&more=1&c=1&tb=1&pb=1
http://www.whichlens.com/index.php?blog=5&title=tamron_sp_af28_75mm_f_2_8_xr_di_ld_asphe&more=1&c=1&tb=1&pb=1
http://www.photozone.de/8Reviews/lenses/tamron_2875_28/index.htm
http://www.etischer.com/1dmk2/lenstests/28mm/test.html (Tamron 28-75 f/2.8 @ 28mm vs Canon 17-40mm f/4L @ 28mm)
http://www.etischer.com/300d/lenstests/28mm/test.html (Sigma 12-24mm f/4.5 - 5.6 vs Tamron 28-75mm f/2.8 vs Canon EF-S 18-55mm)
http://www.etischer.com/1dmk2/lenstests/Canon_16-35mm/ (Canon 16-35L f/2.8L vs Sigma 12-24mm f/4.5-5.6 vs Sigma 20mm f/1.8 vs Tamron 28-75mm f/2.8)

Tamron 28-200/3.8-5.6 XR Aspherical (IF) Macro
http://www.connect.ab.ca/~buddy/lenst2.htm (тестовые таблицы нескольких объективов сразу)

Tamron 28-300/3.5-6.3 XR Di LD Macro
http://www.bobatkins.com/photography/reviews/tamron_28_300_review.html

Tamron 500/8 Mirror Lense
http://www.bobatkins.com/photography/tutorials/mirror.html

Tamron 90/2.8 SP Di Macro
http://www.connect.ab.ca/~buddy/lenst1.htm (тестовые таблицы нескольких объективов сразу)
http://orchideen-kartierung.de/Macro100E.html (на немецком, но картинки говорят сами за себя)
http://www.photozone.de/8Reviews/lenses/tamron_90_28/index.htm

НАВЕРХ

TOKINA (http://www.thkphoto.com/products/tokina/index.html)

AS
Aspherical Optics. A standard lens is made up of a combination of spherical lens elements. Individual “lenses” within the lens are commonly referred to as “elements”. A spherical element has an even curve to the surface of the glass. However, there can be problems with such elements; light entering the center of the lens and light entering at the edge may not be perfectly focused at the same point. This is called spherical aberration. More advanced computer assisted optical designs are creating lenses with more spherical elements. More spherical elements within a lens means a greater risk of spherical aberration having a negative impact on optical quality.
To eliminate spherical aberration, Tokina employs aspherical all-glass elements in many of its optical designs to correct this problem. The aspherical shaped surface of the lens element focuses light rays entering both the center and edge of the element correctly at the film plane for an accurately focused image. In addition to correcting spherical aberration, these elements fully correct light quantity and distortion at the edge of the image and provide excellent results when used in combination with a floating element design.

FR
F&R Aspherical. This lens, the AT-X 235 AF PRO encompasses Tokina’s new F&R aspherical molded glass elements of an exceptionally large 50 mm diameter in the front and 20 mm diameter element at the rear. The 50 mm front element is one of the largest aspherical elements being employed in optical designs today. These give outstanding performance with very even illumination in the corners and correction of spherical aberration across the image area.

SD
Super Low Dispersion. When standard optical glass is used in telephoto lenses, a phenomenon called chromatic aberration can occur. Chromatic aberration is the inherent tendency for glass to disperse (separate) a ray of light into the colors of the rainbow. The rainbow effect created by a glass prism is the most dramatic demonstration of chromatic aberration. In lenses, it is much less pronounced, but still creates slightly out of focus colors, akin to an “optical noise” that has a negative impact on the quality of the picture. To eliminate chromatic aberration, Tokina employs expensive, special glass material having super- low dispersion (SD) properties. Lenses in the Tokina line-up with the SD mark incorporate these Super-Low Dispersion glass elements, minimizing the secondary spectrum or optical noise caused by chromatic aberration.

HLD
High-refraction, Low Dispersion. Tokina’s wide-angle and standard zoom lenses feature a higher quality of optical glass known as Tokina HLD (High-refraction, Low Dispersion) glass. Having higher refractive index and lower dispersion properties, HLD glass is far less likely than standard optical glass to create lateral chromatic aberration, which is often a problem with conventionally designed wide-angle lenses

MC
Multi-Coating. Reflections off the surface of lens elements are the enemy to any photographer and to every lens manufacturer. They are reduced or eliminated by bonding multiple layers of a transparent anti-reflection chemical to the surface of the glass. Tokina has developed and perfected a unique coating technique for all of its optics so that they will maintain faithful color reproduction and render clean, sharp images.

FE
Floating Element System. When designing a lens, Tokina calibrated its astigmatism at all points between minimum focus distance and infinity so that it will give the best image results at all settings. However, when there are large differences between the focus limits, effect calibration is not possible. A floating element system incorporates optical elements that move in proportion to the focus setting of the lens. This allows astigmatism to be corrected. Many Tokina lenses employ floating element systems to provide optimum correction of astigmatism from minimum focus distance to infinity.

IFS
Internal Focus System. The two most used methods of focusing a lens are either the complete straight forward movement of lens elements (used mainly with single focal length lenses) or the rotation of the entire lens barrel group (used mainly with zoom lenses). The internal focusing system used by Tokina move each element group within the lens, but does not change the overall length of the lens. This is especially useful with telephoto designs.
The internal focusing system has a number of advantages including;
1. Faster focusing
2. Improved handling due to fewer movements near the center of gravity
3. More compact lens designs
4. Superior use of filters because the barrel with the filter thread does not rotate.

IRF
Internal Rear Focus System. By movement of rear elements only.

FC
Focus Clutch Mechanism. Tokina AT-X PRO series lenses all feature the patented “Focus Clutch” Mechanism for switching the lens between auto focus and manual focus modes.
The manual focusing ring can move (be snapped) back and forth between an AF and MF position. When the focusing ring is forward in the AF position, it is not engaged to any of the internal focus gearing and will turn freely. Without the added weight of the metal ring the camera can auto focus the lens more quickly and smoothly.
For manual focus, simply rotate the focus ring all the way to one side or the other on the focus travel, either infinity or it’s closest focusing distance, then pull back (towards the mount plate) on the manual focus ring. While pulling back, rotate the ring from one side of the focus travel to the other. When the gears align, the focus ring will snap back into the MF position and the lens can be focused manually.
To return the manual focus ring to auto focus mode, simply snap the ring forward from any point

OTFC
One Touch Focus Clutch Mechanism. A refinement of the focus clutch mechanism has been incorporated in the AT-X 280 AF PRO Nikon and Canon mount, so that now the lens’ focus ring can be snapped back to the manual focus position at any time, from any position. This improvement means it is not necessary to change the AF/MF switch (on the body with Nikon or the lens with Canon) every time the lens is changed from auto focus to manual focus mode.

D
Digitally Integrated Design

DX
Digital APS-C lenses.

AT-X Pro
Улучшенная серия. Аналог EX у Sigma.

Tokina 12-24/4 AT-X Pro DX AS SD IF OTFC
http://www.photozone.de/8Reviews/lenses/tokina_1224_4/index.htm
http://www.photo.net/equipment/tokina/12-24-f4/
http://www.thkphoto.com/products/tokina/test_article.html
http://www.popphoto.com/assets/download/PP0405_TokinaLensTest.pdf
http://www.anands.net/faq/tokina.html

Tokina 17/3.5 AT-X Pro AS HLD FC
http://www.prime-junta.net/petteri/pont/Reviews/d_Tokina_AT-X_17mm/a_Tokina_AT-X_17_mm.html
http://www.photozone.de/8Reviews/lenses/tokina_17_35/index.htm

Tokina 19-35/3.5-4.5 HLD IF
http://www.tawbaware.com/sigma_tokina_ultra_wide_test.htm
http://www.tawbaware.com/sigma_tokina_ultra_wide_test_2.htm

Tokina AF 28-70/2.6-2.8 AT-X Pro II (предшественник следующего в списке объектива)
http://www.photozone.de/8Reviews/lenses/tokina_2870_2628/index.htm

Tokina AF 28-70/2.8 AT-X Pro SV HLD IF FC
http://www.photozone.de/8Reviews/lenses/tokina_2870_28/index.htm

Tokina 28-80/2.8 AT-X Pro AS SD IF OTFC
http://www.tawbaware.com/sigma_tokina_test1.htm
http://www.outdoorphotographer.com/content/pastissues/2000/dec/wideangle.html

Tokina AF 100-300/4 AT-X II
http://www.photozone.de/8Reviews/lenses/tokina_100300_4/index.htm

НАВЕРХ

ПРОЧИЕ БРЭНДЫ

Peleng 8/3.5 Fisheye
http://www.photozone.de/8Reviews/lenses/peleng_8_35/index.htm
http://www.jarnell.com/reviews/peleng/index.htm
http://www.muellerworld.com/peleng/
http://www.pauck.de/marco/photo/stuff/peleng_fisheye/peleng_fisheye.html

Zenitar 16 fisheye
http://www.bobatkins.com/photography/reviews/fisheye.html
http://etischer.com/zenitar/zenitar16mm.html

ЗМ-5СА 500/8 (читается Зе-Эм-Пять-Эс-А)
http://ildar-gumerov.newmail.ru/zm-5ca.htm

Hartblei Super-Rotator 80/2.8 MC
http://www.photozone.de/8Reviews/lenses/hartblei_80_28/index.htm

Hexanon 24/2.8
http://www.connect.ab.ca/~buddy/lenst2.htm (тестовые таблицы нескольких объективов сразу)

Hexanon 50/1.4
http://www.connect.ab.ca/~buddy/lenst2.htm (тестовые таблицы нескольких объективов сразу)

Hexanon 50/1.7
http://www.connect.ab.ca/~buddy/lenst2.htm (тестовые таблицы нескольких объективов сразу)

Jupiter-9 85/2.0
http://www.bobatkins.com/photography/eosfaq/manual_focus_EOS.html

Kenko 1.5x Tele Converter
http://www.bobatkins.com/photography/reviews/tcs.html

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