Focus Teleconverter Lens
 Nikon fit Vivitar 2X teleconverter lens manual focus tele-converter AI US $39.99 
|
 Nikon fit Vivitar MC 3X 3X-3 teleconverter lens manual focus tele-converter AI US $79.99
|
| Powered by phpBay Pro |
Is this accurate?
A Retrofocus lens design is basically an attachment that is added to the front of a lens for an SLR camera (usually a wide-anlge lens or even a 'normal' focal length lens) to DECREASE the focal length.. correct??
so it is the exact opposite of what a teleconverter/extender is?
is it ALWAYS an attachment? or are there lenses already designed this way? Of course wide angle lenses must already be a retrofocus design right? photographers aren't ALWAYS adding this attachment when they want to use a wide angle lens, are they?
thank you~
Yes, I think you've got it. A retrofocus attachment goes on the front of a lens to decrease its focal length, similar to the way a tele extender goes on the back to increase focal length.
Wide angle SLR lenses are of necessity retrofocus designs, meaning they incorporate elements that function the same way a retrofocus attachment does. A retrofocus design is sort of the opposite of a telephoto, in which a negative rear lens group is used to create a long focal length in a shorter space.
Items Recently Purchased From This Site:
| Powered by phpBay Pro |
Best Posts
- Series Service Repair
- Battery Sony Ccd
- Replacement Lcd Screen
- Vision Waterproof Wireless
- Cover Parts Repair
- Zeiss Jena Tessar
- Telephoto Tele Lens
- Dual Charger Canon
- Top Cover Plate
- Jvc Minidv Digital
- Dock Insert Adapter
- Nikon Lens Cap
- Red Yellow Green
- Camera Parts Oem
- Camera Hood Petal
Categories
- Camcorder Accessories (973)
- Camera Parts (309)
- Film Cameras (375)
- Flashes (540)
- Lenses And Filters (2031)
- Updates (1)
Tags
Recently Added
- Lens Lens Hood
- Battery Cover Parts
- Duty Lens Hood
- Zoom Nikkor Lens
- Canon Eos Xsi
- Polarized Filter Kit
- Lens Filters Set
- Part Oem Lcd
- Ittl Macro Ring
- Channel Studio Flash
Calender
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| « Apr | ||||||
| 1 | 2 | 3 | 4 | 5 | 6 | |
| 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 28 | 29 | 30 | 31 | |||
Archives
- April 2011 (5)
- March 2011 (154)
- February 2011 (170)
- January 2011 (164)
- December 2010 (181)
- November 2010 (168)
- October 2010 (213)
- September 2010 (167)
- August 2010 (155)
- July 2010 (171)
- June 2010 (167)
- May 2010 (173)
- April 2010 (174)
- March 2010 (168)
- February 2010 (82)
- January 2010 (75)
- December 2009 (81)
- November 2009 (84)
- October 2009 (88)
- September 2009 (86)
- August 2009 (80)
- July 2009 (83)
- June 2009 (80)
- May 2009 (77)
- April 2009 (90)
- March 2009 (90)
- February 2009 (37)
- January 2009 (30)
- December 2008 (47)
- November 2008 (53)
- October 2008 (44)
- September 2008 (36)
- August 2008 (33)
- July 2008 (47)
- June 2008 (51)
- May 2008 (30)
- April 2008 (30)
- March 2008 (30)
- February 2008 (43)
- January 2008 (45)
- December 2007 (42)
- November 2007 (30)
- October 2007 (39)
- September 2007 (32)
- August 2007 (42)
- July 2007 (44)
- June 2007 (41)
- May 2007 (44)
- April 2007 (34)
- March 2007 (47)
- February 2007 (40)
- January 2007 (12)
