| |
| |
|
| |
APSc
fisheyes |
| |
35mm
fisheyes |
| |
MF
fisheyes |
| |
Underwater |
| |
special |
| |
adapters |
| |
theory |
| |
literature |
| |
|
| |
©luca
vascon 2006 |
|
|
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 |
|
|
