Difference between revisions of "Bellows"
m (minor grammar) |
m (images with lensboard movements added) |
||
| Line 2: | Line 2: | ||
<div class="floatright">[http://www.flickr.com/photos/89864432@N00/424536869/in/pool-camerapedia/ http://farm1.static.flickr.com/180/424536869_a5042fc6e5_m.jpg]<br/><small>Left: folded bellows of a folding camera seen through<br/>opened camera back. Right: same bellows unfolded</small></div> | <div class="floatright">[http://www.flickr.com/photos/89864432@N00/424536869/in/pool-camerapedia/ http://farm1.static.flickr.com/180/424536869_a5042fc6e5_m.jpg]<br/><small>Left: folded bellows of a folding camera seen through<br/>opened camera back. Right: same bellows unfolded</small></div> | ||
| − | A '''Bellows''' can be an integral or optional part of a photographic camera and serves as alternate lens tube or [[lens tube extension]]. For photographing, a bellows has to be expanded to its working length. Most bellows cameras have a front door upon which the bellows unfold when the door's opened for camera usage. More sophisticated bellows cameras allow one to fix the bellows in various positions to optimize the image plane for special applications like architecture photography. | + | A '''Bellows''' can be an integral or optional part of a photographic camera and serves as an alternate lens tube or [[lens tube extension]]. For photographing, a bellows has to be expanded to its working length. Most bellows cameras have a front door upon which the bellows unfold when the door's opened for camera usage. More sophisticated bellows cameras allow one to fix the bellows in various positions to optimize the image plane for special applications like architecture photography. |
As an optional part of a camera with exchangeable lenses, a bellows can extend the lenses' capabilities to make images of small objects at small distances by extending the lens tube's length. Such a bellows can be fixed at any length as the length of its guide rail(s) allow. | As an optional part of a camera with exchangeable lenses, a bellows can extend the lenses' capabilities to make images of small objects at small distances by extending the lens tube's length. Such a bellows can be fixed at any length as the length of its guide rail(s) allow. | ||
| + | |||
| + | {{br}} | ||
| + | {{Flickr_image | ||
| + | |image_source= http://www.flickr.com/photos/heritagefutures/5464239271/in/pool-camerawiki | ||
| + | |image= http://farm6.static.flickr.com/5019/5464239271_889bec2f82_m.jpg | ||
| + | |image_align= right | ||
| + | |image_text= Principle of Double Expansion Bellows | ||
| + | |image_by= Dirk HR Spennemann | ||
| + | |image_rights= with permission | ||
| + | }} | ||
{|class=plainlinks | {|class=plainlinks | ||
| Line 23: | Line 33: | ||
|} | |} | ||
{{br}} | {{br}} | ||
| + | |||
| + | <center> | ||
| + | {| class="plainlinks" style="text-align: center;" | ||
| + | || [http://www.flickr.com/photos/heritagefutures/5128395758/in/pool-camerawiki http://farm5.static.flickr.com/4063/5128395758_ec82c65a37_m.jpg] | ||
| + | || [http://www.flickr.com/photos/heritagefutures/5127794271/in/pool-camerawiki http://farm2.static.flickr.com/1359/5127794271_8d4890b382_m.jpg] | ||
| + | || [http://www.flickr.com/photos/heritagefutures/5128409602/in/pool-camerawiki http://farm5.static.flickr.com/4133/5128409602_16959ee256_m.jpg] | ||
| + | || | ||
| + | |- | ||
| + | || [http://www.flickr.com/photos/heritagefutures/5128401348/in/pool-camerawiki http://farm2.static.flickr.com/1401/5128401348_93a64922e5_m.jpg] | ||
| + | || [http://www.flickr.com/photos/heritagefutures/5128413652/in/pool-camerawiki http://farm5.static.flickr.com/4024/5128413652_85c5cfb8b0_m.jpg] | ||
| + | || [http://www.flickr.com/photos/heritagefutures/5127788119/in/pool-camerawiki http://farm2.static.flickr.com/1086/5127788119_7f85e0200c_m.jpg] | ||
| + | || | ||
| + | |- | ||
| + | | colspan=3 | Lens board movements<br>''[[Konishiroku]] Lily, 6.5×9cm with [[Hexar lenses|Hexar Ser.1]] 10.5cm f/4.5 lens in [[Durax]] shutter,<br><small> Images by Dirk HR Spennemann</small> {{with permission}}'' | ||
| + | |} | ||
| + | </center> | ||
| + | |||
{| | {| | ||
||[http://www.flickr.com/photos/50678983@N00/314234827/in/pool-camerapedia/ http://farm1.static.flickr.com/118/314234827_0c6b211c1f_m.jpg] | ||[http://www.flickr.com/photos/50678983@N00/314234827/in/pool-camerapedia/ http://farm1.static.flickr.com/118/314234827_0c6b211c1f_m.jpg] | ||
| Line 29: | Line 56: | ||
||[http://www.flickr.com/photos/89864432@N00/1477250439/in/pool-camerapedia/ http://farm2.static.flickr.com/1109/1477250439_1208103867_m.jpg] | ||[http://www.flickr.com/photos/89864432@N00/1477250439/in/pool-camerapedia/ http://farm2.static.flickr.com/1109/1477250439_1208103867_m.jpg] | ||
|- | |- | ||
| − | ||lens board in centric position||lens board shifted||lens board tilted vertically and horizontally||lens board of professional [[press camera]] shifted up and tilted down | + | ||lens board in centric position||lens board shifted||lens board tilted vertically and horizontally||lens board of a professional [[press camera]] shifted up and tilted down |
|} | |} | ||
<br style="clear:both"> | <br style="clear:both"> | ||
| + | |||
| + | |||
[[Category: Camera parts]] | [[Category: Camera parts]] | ||
[[Category: Lens accessories]] | [[Category: Lens accessories]] | ||
Revision as of 12:43, 21 February 2011
Left: folded bellows of a folding camera seen through
opened camera back. Right: same bellows unfolded
A Bellows can be an integral or optional part of a photographic camera and serves as an alternate lens tube or lens tube extension. For photographing, a bellows has to be expanded to its working length. Most bellows cameras have a front door upon which the bellows unfold when the door's opened for camera usage. More sophisticated bellows cameras allow one to fix the bellows in various positions to optimize the image plane for special applications like architecture photography.
As an optional part of a camera with exchangeable lenses, a bellows can extend the lenses' capabilities to make images of small objects at small distances by extending the lens tube's length. Such a bellows can be fixed at any length as the length of its guide rail(s) allow.
|
| Principle of Double Expansion Bellows image by Dirk HR Spennemann (Image rights) |
|
|
The average folding camera unfolds its bellows to a fixed length. Some models with exchangeable lenses allow different bellows expansion lengths. Some sophisticated amateur cameras allow tilts and shifts, but in most amateur cameras the bellows is just optimized for the compactness of the folded camera.
|
|
| Bellows for macro photography with modern SLRs are geometrically more like accordion bellows than like typical built-in camera bellows. That means a macro bellows has an equal diameter throughout its length. |
The bellows of professional view cameras are also accordion-bellows-like or with only little reduction of diameter towards the lens mount plate. That gives these bellows better flexibility for tilting and shifting the lens to reach optimal image geometry and sharpness plane. But some amateur plate cameras offer such lens board flexibility too, despite of non-accordion bellows geometry. |
|
|
|
|
|
|
|
|
| Lens board movements Konishiroku Lily, 6.5×9cm with Hexar Ser.1 10.5cm f/4.5 lens in Durax shutter, Images by Dirk HR Spennemann (Image rights) | |||
|
|
|
|
| lens board in centric position | lens board shifted | lens board tilted vertically and horizontally | lens board of a professional press camera shifted up and tilted down |
