Difference between revisions of "Derby ID key"

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The dichotomous key provided below provides an avenue at identifying the types (it is recommended that you follow the steps, rather than scanning for criteria).  The typology set out here was created by observation of a large number of Derby cameras in the author’s collection<ref>Photographica Collection Dirk HR Spennemann</ref>.  
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__NOTOC__
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==Identifying your Derby==
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The Foth [[Derby]] comes in a bewildering range of variants. In total five discrete types can be distinguished, each with their own sub-types, lens combinations and viewfinder options, augmented by additional variations subject to the market the camera was sold to. The technical and construction details common to all Derby models are:
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*Cloth focal plane shutter with speed settings of B, 1/25, 1/50, 1/75, 1/100, 1/200, and 1/500.
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*Leather-covered aluminium body construction, with a strut folding system.
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*Lens with helical focussing.
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The dichotomous key provided below provides an avenue at identifying the types of [[Foth]] [[Derby]]. Given the confusing similarity of models and variants, it is recommended that you follow the steps, rather than scanning for criteria. When you have identified your model, click on the model name to see a full description.  The typology set out here was created by observation of a large number of [[Derby]] cameras in the author’s collection,<ref>Photographica Collection Dirk HR Spennemann</ref> with additional data and observation by a wide range of camera collectors.
  
 
==STEP 1 Does the Derby have a self-timer?==
 
==STEP 1 Does the Derby have a self-timer?==
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:‘Foth Derby” embossed on the leather
 
:‘Foth Derby” embossed on the leather
 
::Are the windows rimmed?
 
::Are the windows rimmed?
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:::Yes :→ Derby 1A  
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:::Yes :→ [[Derby#Derby (1930)|Derby 1A]]
 
:::No
 
:::No
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::::negatives 24 x 36 :→ Derby 1AB
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::::negatives 24 x 36 :→ [[Derby#Derby (1930)| Derby 1B]]
 
::::negatives 30 x 40 :→ (existence unclear)
 
::::negatives 30 x 40 :→ (existence unclear)
 
:‘Gallus” embossed on the leather
 
:‘Gallus” embossed on the leather
−
::→ Gallus Derby  
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::→ [[Derby#Gallus Derby (1937–)|Gallus Derby]]
 
Yes
 
Yes
 
:Does the Derby have a rangefinder?
 
:Does the Derby have a rangefinder?
 
::No
 
::No
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:::GO TO STEP 2
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:::[[Derby_ID_key#STEP 2 What windows does the camera back show?|GO TO STEP 2]]
 
::Yes
 
::Yes
 
:::Rangefinder mounted on lens board
 
:::Rangefinder mounted on lens board
 
::::removable (separation line visible)?
 
::::removable (separation line visible)?
 
:::::Yes
 
:::::Yes
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::::::→ Derby 4a (existence unclear)
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::::::→ [[Derby#Derby 4 (1936–1940)|Derby 4a]] (existence unclear)
 
:::::No
 
:::::No
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::::::→ Derby 4b
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::::::→ [[Derby#Derby 4 (1936–1940)|Derby 4b]]
 
:::Range finder mounted on camera body
 
:::Range finder mounted on camera body
 
:::: ‘Foth Paris on winding knob?”
 
:::: ‘Foth Paris on winding knob?”
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:::::→ Derby 5  
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:::::→ [[Derby#Derby 5 (193??)|Derby 5]]
−
 
 
−
 
 
  
 
==STEP 2 What windows does the camera back show?==
 
==STEP 2 What windows does the camera back show?==
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:Does the lens have a serial number?
 
:Does the lens have a serial number?
 
::No  
 
::No  
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:::lens f2.5  
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:::‘Germany’ on the advance knob?
−
::::→ Derby 2A/2.5  
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::::No
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:::lens f3.5  
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:::::lens f2.5  
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::::→ Derby 2A/3.5  
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::::::→ [[Derby#Derby 2 (1931–)|Derby 2A/2.5]]
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:::::lens f3.5  
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::::::→ [[Derby#Derby 2 (1931–)|Derby 2A/3.5]]
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::::No, but 'Germany' embossed in the leather
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:::::→ [[Derby#Derby 2 (1931–)|Subvariant 2Ai]]
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::::Yes
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:::::lens f2.5
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::::::→ [[Derby#Derby 2 (1931–)|Derby 2B/2.5]]
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:::::lens f3.5
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::::::→  [[Derby#Derby 2 (1931–)|Derby 2B/3.5]]
 
::Yes  
 
::Yes  
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:::Pressure plate margin
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:::Pressure plate margin (see photos below)
 
::::notched  
 
::::notched  
 
:::::lens f2.5  
 
:::::lens f2.5  
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::::::→ Derby 2B/2.5  
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::::::→ [[Derby#Derby 2 (1931–)|Derby 2C/2.5]]
 
:::::lens f3.5  
 
:::::lens f3.5  
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::::::→ Derby 2B/3.5  
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::::::→ [[Derby#Derby 2 (1931–)|Derby 2C/3.5]]
 
::::straight  
 
::::straight  
 
:::::lens f2.5  
 
:::::lens f2.5  
−
::::::→ Derby 2C/2.5  
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::::::→ [[Derby#Derby 2 (1931–)|Derby 2D/2.5]]
 
:::::lens f3.5  
 
:::::lens f3.5  
−
::::::→ Derby 2C/3.5  
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::::::→ [[Derby#Derby 2 (1931–)|Derby 2D/3.5]]
 
Two oval red and two oval green windows
 
Two oval red and two oval green windows
 
:Does the lens have a serial number?
 
:Does the lens have a serial number?
 
::No  
 
::No  
 
:::lens f2.5  
 
:::lens f2.5  
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::::→ Derby 3A/2.5  
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::::→ [[Derby#Derby 3 (1935–1939?)|Derby 3A/2.5]]
 
:::lens f3.5  
 
:::lens f3.5  
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::::→ Derby 3A/3.5  
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::::→ [[Derby#Derby 3 (1935–1939?)|Derby 3A/3.5]]
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::Yes  
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::Yes
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:::lens f2.5  
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:::Foth Anastigmat
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::::→ Derby 3B/2.5  
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::::lens f2.5  
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:::lens f3.5  
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:::::→ [[Derby#Derby 3 (1935–1939?)|Derby 3B/2.5]]
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::::→ Derby 3B /3.5
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::::lens f3.5  
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:::::→ [[Derby#Derby 3 (1935–1939?)|Derby 3B/3.5]]
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:::Zeiss Tessar
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::::lens f2.5
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:::::→ [[Derby#Derby 3 (1935–1939?)|Derby 3C/2.5]]
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::::lens f3.5
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:::::→ [[Derby#Derby 3 (1935–1939?)|Derby 3C/3.5]]
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:::Dallmeyer Dallon
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::::lens f5.6
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:::::→ [[Derby#Derby 3 (1935–1939?)|Derby 3D]]
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===ID images===
 +
 
 +
{|class=plainlinks
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||[http://www.flickr.com/photos/heritagefutures/4870903713/in/pool-camerawiki http://farm5.static.flickr.com/4122/4870903713_0c81f17ece_m.jpg]<br/>notched pressure plate <br/>with metal rims
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||[http://www.flickr.com/photos/heritagefutures/4870900831/in/pool-camerawiki http://farm5.static.flickr.com/4142/4870900831_59e52cd2a8_m.jpg]<br/>notched pressure plate<br/>&nbsp;
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||[http://www.flickr.com/photos/heritagefutures/4871507508/in/pool-camerawiki http://farm5.static.flickr.com/4077/4871507508_b083d9769b_m.jpg]<br/>straight pressure plate<br/>&nbsp;
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||[http://www.flickr.com/photos/heritagefutures/4871499024/in/pool-camerawiki http://farm5.static.flickr.com/4122/4871499024_898b35e98a_m.jpg]<br/>straight pressure plate<br/>with red and green windows
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|-
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|colspan=4 align=center | <small>images by {{image author|Dirk HR Spennemann}}</small> {{with permission}}
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|}
  
 
== Notes ==
 
== Notes ==
 
<references />
 
<references />
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 +
[[Category:Foth]]

Latest revision as of 00:31, 26 February 2015

Identifying your Derby

The Foth Derby comes in a bewildering range of variants. In total five discrete types can be distinguished, each with their own sub-types, lens combinations and viewfinder options, augmented by additional variations subject to the market the camera was sold to. The technical and construction details common to all Derby models are:

  • Cloth focal plane shutter with speed settings of B, 1/25, 1/50, 1/75, 1/100, 1/200, and 1/500.
  • Leather-covered aluminium body construction, with a strut folding system.
  • Lens with helical focussing.

The dichotomous key provided below provides an avenue at identifying the types of Foth Derby. Given the confusing similarity of models and variants, it is recommended that you follow the steps, rather than scanning for criteria. When you have identified your model, click on the model name to see a full description. The typology set out here was created by observation of a large number of Derby cameras in the author’s collection,[1] with additional data and observation by a wide range of camera collectors.

STEP 1 Does the Derby have a self-timer?

No

‘Foth Derby” embossed on the leather
Are the windows rimmed?
Yes :→ Derby 1A
No
negatives 24 x 36 :→ Derby 1B
negatives 30 x 40 :→ (existence unclear)
‘Gallus” embossed on the leather
→ Gallus Derby

Yes

Does the Derby have a rangefinder?
No
GO TO STEP 2
Yes
Rangefinder mounted on lens board
removable (separation line visible)?
Yes
→ Derby 4a (existence unclear)
No
→ Derby 4b
Range finder mounted on camera body
‘Foth Paris on winding knob?”
→ Derby 5

STEP 2 What windows does the camera back show?

Two round red windows

Does the lens have a serial number?
No
‘Germany’ on the advance knob?
No
lens f2.5
→ Derby 2A/2.5
lens f3.5
→ Derby 2A/3.5
No, but 'Germany' embossed in the leather
→ Subvariant 2Ai
Yes
lens f2.5
→ Derby 2B/2.5
lens f3.5
→ Derby 2B/3.5
Yes
Pressure plate margin (see photos below)
notched
lens f2.5
→ Derby 2C/2.5
lens f3.5
→ Derby 2C/3.5
straight
lens f2.5
→ Derby 2D/2.5
lens f3.5
→ Derby 2D/3.5

Two oval red and two oval green windows

Does the lens have a serial number?
No
lens f2.5
→ Derby 3A/2.5
lens f3.5
→ Derby 3A/3.5
Yes
Foth Anastigmat
lens f2.5
→ Derby 3B/2.5
lens f3.5
→ Derby 3B/3.5
Zeiss Tessar
lens f2.5
→ Derby 3C/2.5
lens f3.5
→ Derby 3C/3.5
Dallmeyer Dallon
lens f5.6
→ Derby 3D

ID images

4870903713_0c81f17ece_m.jpg
notched pressure plate
with metal rims 		4870900831_59e52cd2a8_m.jpg
notched pressure plate
  		4871507508_b083d9769b_m.jpg
straight pressure plate
  		4871499024_898b35e98a_m.jpg
straight pressure plate
with red and green windows
images by Dirk HR Spennemann (Image rights)

Notes

  1. ↑ Photographica Collection Dirk HR Spennemann
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