![\"Lens\"](\"https:\/\/gcmphotographic.com\/wp-content\/uploads\/2013\/03\/Lens.jpg\")
<\/a><\/p>\nThis lens from new was a fully manual lens. Not only manual focus, but also it had no contacts from information of focal length or aperture\u00a0information to be recorded by the camera body. “C” did sort this out\u00a0during\u00a0his time of\u00a0owning the lens by “Chipping it ” so that information does now get recorded.<\/p>\n
I hope that “C” may write a post on just now he does this some time.<\/p>\n
This lens is a manual focus lens, I find it very hard to focus with a AF camera body for two reasons. Overall the lens is sharp once stopped down a little and displaying only a little colour fringing on the edges of the frame. ‘C’ used the Vivitar 7mm fisheye lens mainly for work with his infra red cameras, whereas I mainly use it for colour work, both applications work extremely well. Lens facts<\/strong> Conclusion<\/strong> If you are looking into buying a Fisheye lens you will find that you have a lot to choose from, from the likes of Canon, Nikon, Sigma, Samyang, Rokinon and Opteka, depending on your camera fit body. Some AF but … Continue reading <\/a> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Lens with AE chip attached<\/p>\n
\n1\/ The focus screens on AF camera bodies are often not easy to use with such a very wide angle of view, having no “split screen”\u00a0to aid focusing as old film camera bodies do.
\n2\/ “Live view” I also don’t find very easy either, even if I use the + magnification button as well!
\n3\/ On ultra wide angle lenses, even the focus indicator can be vague.
\nSo here is how I focus it: I stop the lens down to F11 and focus to “Infinity”, then the Depth of Field of this lens does the rest! (I use f8 and set focus to 10ft since the depth of field is so great it will easily cover as far as infinity – ‘C’)
\nSo simple really, and it does feel very odd\/lazy.
\nI’ve not used this lens for close up style photos yet, but they can be very useful for this as well.<\/p>\n
\nSo how and why would you use a Fisheye lens? Most people see them as “Fun” because of the strange angles you can bend things into. Both “C” and myself have used the lens for this. You can also use it “Carefully” and have a very wide field of view by keeping the camera and lens horizontal to the ground.<\/p>\n
\nTake a look at two images from Whitstable Harbour.\u00a0 Just by changing the angle of the camera, this lens can change a view.<\/p>\n<\/a> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Photograph taken with camera mounted square on.<\/p>\n<\/a> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Bend a little out of square and look what happens!<\/p>\n<\/a><\/a> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Two sample from ‘C’s’ infra red selection<\/p>\n
\nDesigned specifically for the APSC sensor
\nWhilst this particular lens is branded as Vivitar, it is in fact made by Samyang, the same lens is also sold under Rokinon, Opteka, Walimex and at least a few other names.
\nFocal length for this lens is quoted as 7mm, other brands are listed as being anywhere from 6.5mm through to 8mm.
\nAperture is from f3.5 through to f22.
\nLens design is 10 elements in 7 groups, multi coated lenses and a 7 bladed diaphragm, weighing approximately 390g.
\nSupplied with front and rear caps and a draw string case to protect it.<\/p>\n
\nIs it worth owning one of these lenses?
\nYES!
\nSometimes you just need to have some fun!<\/p>\n","protected":false},"excerpt":{"rendered":"