Teleconverters are generally an interesting thing. This copy of Canon Extender 2x from the first series, the years of the nineties. Almost my age, but how it was done!  It looked like fire and water went through, and even fell. Nevertheless, despite the external slaughter, it retained its optical qualities. The case is metal (in the later versions, in my opinion, it is already plastic). The Extender 2x requires strong hands and patience to operate. In general, first things first.

General information and application

By definition, a teleconverter is used to increase the focal length of a compatible lens. They were invented as a cheaper and less bulky alternative to long focal length lenses. The most common converters have magnifications of 1,4x and 2x. 3x are less common, they are not observed in the canon in the current catalogs. Actually, the main purpose of the converter is to increase the focal length of the lens with minimal costs in terms of practicality / price / quality.

With native, proprietary converters, the image quality, if it drops, is insignificant. However, in the case of using a converter, there is also one significant minus - a drop in the illumination level by 2 steps. In other words, a lens with a focal length of 200 millimeters and a maximum open aperture of f \ 4 turns into 400mm f \ 8. Why? Because (for rough) we "lengthen" our lens without changing its diameter, respectively, less light passes to the matrix. With such a drop in illumination on the lower-end Canon DSC models (XXXD, XXXD, XXD), autofocus stops working (the sensors simply will not see the difference in contrast).

Of course, it is possible to deceive the system, and autofocus will even work (one of the contacts on the bayonet is closed), but it will not work, to put it mildly.

Specifically, in my case, the autofocus motor turned back and forth when sighting through the viewfinder. In LiveView, of course, everything was not much better, however, I preferred the interchangeable focusing screen with a micro-raster and a dual image in the center to the agonizing expectations and outright lameness of the automation. Another solution to the problem is to use Extender 2x on low-end cameras with fast lenses, which have an aperture value, for example, f2.8. Well, or use the 1.4x teleconverter. In older camera models (EOS XD), autofocus simply slows down.

However, even with this screen, I could not make friends with the converter right away. The 60D missed a lot. However, having rearranged a bunch of Canon EF 70-200 f \ 4 L + Extender 2x to Canon 300D, in one trip I got a very large number of good, sharp frames. And then I learned in my sixties. The whole tsimmes turned out to be that at the sixty the resolution of the matrix is ​​three times higher, and therefore, at relatively low shutter speeds when shooting handheld, it is problematic to get a sharp frame.

Throughout its history, the converter circuit has improved with each new update, and with the release of the third version of Canon Extender 2x, its presence in the system (except for a drop in illumination) is barely noticeable. Although, to be honest, the first episode is not bad either (especially if there is no money for a new extender at all).

The device is a small white barrel, on the barrel there is a lever for fixing the Extender 2x in bayonete cameras. The converter is weatherproof and suitable for use with top-end cameras and lensmi L-class. Unfortunately, not all Canon lenses are compatible with these converters, just because of the protruding front element of the extender.

Сonclusion

The pros of using the Canon Extender 2x at a glance:

  • increase in focal length lens
  • saving a certain amount of money (the difference in the cost of a converter and lenses of the same focal length obtained can reach astronomical amounts)
  • light weight
  • small size

Cons:

  • the lens gets 2 stops darker
  • (not) significant drop in image quality
  • problems with stabilization when working handheld on cloudy days (ISO 3200-6400 our everything)
  • accordingly, it is advisable to use a tripod (depending on lens, basically)
  • inoperative autofocus on low-end Canon DSLRs
  • slowdown of autofocus on older Canon models

Despite the disadvantages, the use of Extender 2x naturally has its advantages. What to do is up to you. Converters of the first version are not sold at such a high price. Gallery of my samples on Canon 60D and Canon 300D:

All CANON lenses on the portal

  1. Canon (manufacturer)
  2. Canon RF Serenar 85 mm f / 1.9 M39
  3. Canon RF 50mm f / 1.8 Serenar
  4. Canon RF 35mm f / 2 LTM M39
  5. Canon RF 50mm f / 1.8
  6. Canon FL 50mm f / 1.4
  7. Canon FL 50mm f / 1.4 ii
  8. Canon FL 50mm f / 1.8
  9. Canon FL 135mm f / 2.5
  10. Canon FL 135mm f / 3.5
  11. Canon FD 50mm f / 1.4 SSC
  12. Canon FD 50mm f / 1.8 SC
  13. Canon FD 50 mm f / 3.5 Macro
  14. Canon FD 2.8 / 100 SSC
  15. Canon FD 300mm f5.6 SC
  16. Canon FD 50mm f / 2.0
  17. Canon FD 50mm f1.2L
  18. Canon FD 85mm f / 1.2L
  19. Canon FD 28mm f / 2.8 SC
  20. Canon FD 200mm f / 2.8
  21. Canon FD 55 mm f1.2 SSC
  22. Canon EF 15mm f / 2.8
  23. Canon EF-S 10-18mm f4.5-5.6 IS STM
  24. Canon EF 16-35 f / 2.8 II L USM
  25. Canon EF 20-35 mm f / 3.5-4.5 USM
  26. Canon EF 24-105mm f / 3.5-5.6 IS STM
  27. Canon EF 28-105 mm f / 3.5-4.5 USM II
  28. Canon EF 35mm f1.4L USM
  29. Canon EF 40mm f / 2.8 STM
  30. Canon EF 50mm f / 1.4 USM
  31. Canon EF 50mm f / 1.8
  32. Canon EF 50mm f / 1.8 II
  33. Canon EF 50mm f / 1.8 STM
  34. Canon EF 60mm f / 2.8 macro USM
  35. Canon EF 85mm f / 1.2L II
  36. Canon EF 85mm f / 1.8 USM
  37. Canon EF 1200mm f / 5.6 L USM
  38. Canon EF 38-76mm f / 4.5-5.6
  39. Canon EF 75-300mm f / 4-5.6 III
  40. Canon EF 80-200mm f / 4.5-5.6
  41. Canon EF 24-70 f / 2.8 L USM
  42. Canon EF 28-80 f / 2.8-4 L USM
  43. Canon EF 24-105mm f / 4 L IS USM
  44. Canon EF 50-200mm f / 3.5-4.5 L
  45. Canon EF 70-200mm f / 4L USM
  46. Canon EF 70-200mm f / 4L IS USM
  47. Canon EF 70-300mm f / 4-5.6 IS USM
  48. Canon EF-s 18-55mm f / 3.5-5.6 IS ef-s
  49. Canon EF-s 18-55mm f / 3.5-5.6 IS II ef-s
  50. Canon EF-s 18-55mm f / 3.5-5.6 III DC ef-s
  51. Canon EF-S 18-55mm f / 3.5-5.6 IS STM
  52. Canon EF-s 18-135mm f / 3.5-5.6 IS
  53. Canon EF 28-200 mm f / 3.5-5.6 USM
  54. Canon's first teleconverter EF Extender 2x
  55. Canon 70-300 f / 4.5-5.6 do is usm


Adapters for cameras and lenses

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