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Details about  Selectable aperture pinhole camera

Selectable aperture pinhole camera See original listing
Selectable-aperture-pinhole-camera
Item Ended
Item condition:
Manufacturer refurbished
Ended:
11 Aug, 2012 16:04:45 BST
Starting bid:
£40.00
0 bids ]
Postage:
£10.00 Standard Delivery | See details
Item location:
Horsley, Gloucestershire, United Kingdom

Description

eBay item number:
120962766411
Seller assumes all responsibility for this listing.
Last updated on  05 Aug, 2012 07:06:21 BST  View all revisions
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Item specifics

Condition:
Manufacturer refurbished: An item that has been professionally restored to working order by a manufacturer-approved vendor. ... Read moreabout the condition
Brand:

HCW

Dimensions:

18 cm x 9 cm x 11 cm ( exc. viewfinder)

Type:

Pinhole camera

Weight:

0.7Kg

Film Format:

120

Focal Length (mm):

80 mm

Focus Type:

Fixed


The camera as shown employs an 80 mm " focal length" pinhole with selectable apertures of f 75  f 128  f 256  f 416. It is the prototype used to develop a camera for a client who  suffers from the " What do I want from a pinhole " problem

As a camera builder for some years, I have delivered many lectures on DIY cameras to camera clubs and whilst the mathematics  behind the design of rotational and swing lens cameras gain an intelligent smile, when pinhole shots are displayed the comments range from " I suppose that is a house in the image" to " If I had wanted something that sharp I would have  gone to Zeiss". To overcome this problem the design shown has a rotating disc in the Waterhouse stop mode to support 4 pinholes ( no you cannot make an iris diaphragm when the smallest opening is 120 microns), this allows the photographer to select his / her  own degree of softness


 Using 120 film, each negative is app. 55 mm x 90 mm mm and uses the standard 8 on 120 format.

 An optical viewfinder is fitted

A tripod bush is fitted since all exposures will be 1 second or more in most applications.

The shutter is manually operated by the aluminium knob shown. 

The two test shots were taken at f 75 and f 416 to demonstrate the limits of performance.

A copy of the user manual in pdf format may be viewed in the pdf section of my website www.diyphotographics.sitesnap.co.uk

Business seller information

HCW

Returns policy

Return policy details
Returns accepted

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No questions or answers have been posted about this item.




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