| |
| |
|
| |
|
| |
|
| |
MF
fisheyes |
| |
underwater |
| |
special
and cine |
| |
|
| |
|
| |
x-files
|
| |
theory
|
| |
literature
|
| |
|
| |
©luca
vascon 2006-7 |
|
|
Fisheye adapters or fisheye converters.
Here I'll only discuss about the hstorical, the most common,
or the higher quality ones.
They were born a lot of time ago, when even compact cameras were expensive,
when lower SLR cameras had non-interchangeble lenses. But they had a
second boom in the era of digital cameras, allowing fisheye projection
to the "quite affordable" high level digital compacts. For
both wideangle lovers and panoramic photography addicts.
Now they are in decline again, being the digital slr cameras at the same
price of an old prosumer compact, and being the high quality fisheye
adapters priced closely to a true fisheye lens.
|
| They are afocal lenses that vary the focal lenght
of the lens they are mounted on. They usually fit on the filter
thread of the optics, and are a cost-effective solution to have
a fisheye effect on a generic camera. A pity the optic quality
is generically low, depending on how well the two optic designs
(lens and adepter) fit together. Here we are obviously talking
about fisheye convereters, in which the geometry of representation
is not the classical perspective one, but the f-theta fisheye
projection |
Si tratta di dispositivi afocali, che variano la
lunghezza focale effettiva dell'ottica sulla quale vengono montati.
Genericamente si montano al posto di un filtro davanti all'obiettivo.
Costituiscono una soluzione economica per ottenere l'effetto
fisheye su di una fotocamera qualsiasi. Purtroppo la qualità ottica
lascia spesso a desiderare, ed è aleatoria, dipende dall'incontro
tra gli schemi ottici dell'adattatore e dell'obiettivo.
Qui si parla ovviamente di dispositivi fisheye, nei quali cioè la
geometria di proiezione non è quella della prospettiva classica,
ma la proiezione
fisheye (f-theta) |
| |
|
| |
|
Door
peepholes
Century
Optics
KENKO
|
|
|
type
|
magn.factor
|
elements-groups
|
f.stop
|
years and variants
|
| converter |
0.19X
|
|
has
an internal iris |
branded under several
names |
|
thread
|
circular
|
fullframe
|
dimensions (max diameter, lenght,
weight)
|
No Parallax Point (from bajonet)
|
|
|
|
|
(compact) |
|
Was
branded under several names, but seems not all
are equals.
|
|
| |
Compatibility:
Was intended for be adapted on generic cameras. Also Zeiss-Ikon bayonet
filter adapter. It has been said it is possible to use these adapters
on MF cameras too.
Digital use:
Quite none. Very prone to vignetting. |
NIKON
|
|
|
type
|
magn.factor
|
elements-groups
|
f.stop
|
years and variants
|
| converter |
0.19X
|
|
|
|
|
thread
|
circular
|
fullframe
|
dimensions (max diameter, lenght,
weight)
|
No Parallax Point (from bajonet)
|
28mm
|
around
183 degrees, at widest setting
|
yes,
zooming in.
|
Ø74
x 50mm, 205g
(compact) |
|
The
best quality fisheye adapter I've seen so far
|
mpatibility:
It was designed around the Nikon coolpix 900 serie, to take
IPIX shots (2fisheye emispheres). It can fit many other digital
still cameras, Canon Powershot A-serie, Olympus P-350 and
similar, Sony W-1 to7, it can be mounted on kit Dslr zooms,
or on various video cameras.
Panoramic
heads for FC-E8:
lens specific: Agnos, BoPhoto.
camera specific: Agnos, Kaidan. |
|
 |
Co
|
|
|
|
type
|
magn.factor
|
elements-groups
|
f.stop
|
years and variants
|
| converter |
0.19X
|
|
|
|
|
thread
|
circular
|
fullframe
|
dimensions (max diameter, lenght,
weight)
|
No Parallax Point (from bajonet)
|
needs
tube adapters
|
around
183 degrees, at widest setting
|
yes,
zooming in.
|
Ø101
x 73mm, 580g
(huge)
|
|
really
huge converter, it is usually weak at borders,
and suffers for diffraction and focusing problms.
Once focused properly and diafragm closed in
the camera can give pretty good results.
|
|
 |
Compatibility:
It was designed around the Nikon coolpix 5400-8800 serie, to take
IPIX 360 panoramic shots (2fisheye emispheres). It can fit many
other digital still cameras, Canon Powershot G-serie, many bridge
cameras, it can be mounted on kit Dslr zooms, or on various video
cameras.
Panoramic heads
for FC-E8:
lens specific: Agnos, BoPhoto.
camera specific: Agnos, Kaidan. |
OLYMPUS
|
|
|
type
|
magn.factor
|
elements-groups
|
f.stop
|
years and variants
|
| converter |
0.2X
|
|
|
I think 2 variants
were built |
|
thread
|
circular
|
fullframe
|
dimensions (max diameter, lenght,
weight)
|
No Parallax Point (from bajonet)
|
37mm,
special adapters incuded.
|
around
185 degrees, at widest setting
|
yes,
zooming in.
|
(microscopic) |
|
really
tiny converter, it is usually weak at borders,
and suffers for diffraction problems. Oncediafragm
closed in the camera can give pretty good results.
|
mpatibility:
It was designed around the Olympus cameras, to take IPIX 360
panoramic shots (2fisheye emispheres). In the kit there are
the adapters to provide a 37mm screw filter mount and to
use it on:
I successfully tested it on other cameras such Canon Powershot
A-serie
selfbuilt
adapter
Panoramic
heads for f-con02:
camera specific: Olympus, given with lens kit. |
|
  |
| Co |
RAYNOX
raynox
180
raynox
185
SOLIGOR
|
|
|
type
|
magn.factor
|
elements-groups
|
f.stop
|
years and variants
|
| converter |
0.19X
|
|
|
sold also as "ipix
fisheye" |
|
thread
|
circular
|
fullframe
|
dimensions (max diameter, lenght,
weight)
|
No Parallax Point (from bajonet)
|
37mm
|
around
185 degrees, at widest setting
|
yes,
zooming in.
|
(compact) |
|
really
compact converter, it is second to fc-e8 as quality,
slightly smaller diameter and longer body. Once
diafragm is closed in the camera can give reallybgood
results.
|
|
 |
Compatibility:
It was designed to take IPIX 360 panoramic shots (2fisheye emispheres).
In the kit there are the adapters to provide a 37mm screw filter
mount and to use it on:
I successfully tested it on many cameras such Canon Powershot A-serie,
Sony w1 to w7, Olympus P350, kit lens on a 350D
Panoramic heads
for the soligor:
Lens specific: original IPIX, Agnos on request |
|
|
