Wynne's Infallible Exposure Meter

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Condition: Very Good

Wynne's Infallible Exposure Meter

Circa 1890's - Made in Wrexham, Wales, UK

Supplied in good cosmetic condition in the original tin c/w Instructions, two packets of "Rapid Deadmatch paper" and a list of plate speeds info sheet.

General Wynne's Infallible Exposure Meter Information

Meter Type: Actinometer.

Calibration: Plate speed: F4 - F362 Wynne values. Shutter speed: 1/128 - 64m. Aperture: f4 - f362.

Attributes: The plate speed and apertures share the same scale

The Wynne pre-dates the Watkins Bee meter but did not achieve the popularity of that meter. Early models had no spring in the back of the case and are without the subject guide and orange cover that protects the sensitive paper. The subject table was added in the late 1890s. Around 1897 a small black segment was added to the cover glass to protect the sensitive paper prior to exposure. In 1898 the segment was replaced by an orange glass disc mounted on the cover glass. The new cover glass was available to update older meters, as was the spring (intro. 1900) that fits into the meter case. Around 1901 the tone of the grey tint and the sensitivity of the paper was changed. The new tint was included in packets of sensitive paper. Around 1904 a US dial option was introduced and around 1910 a special dial with speeds up to 1/1000 was sold as the Infallible Snapshot Meter. A solid silver model was also offered rather than the normal nickel plated version. The aperture scale carries the value f5.6 or f5 ½, 5.6 tends to be early but not consistently so.

The price in 1900 was 7/6, this was soon reduced by a shilling but was still considerably more expensive than the Bee meter.

In use the actinic value of the light is measured by the time taken for the sensitive paper to match the standard tint, the plate speed is set against this value. The shutter speed and aperture pairs can then be read on the two scales of the meter.

The patent for the meter shows a watch shaped instrument and mentions that other forms are possible including one with a separate slide rule. A slide rule model is shown in the Photographic Journal of May 1932 and in the BJA 1894.

Dennison, Wigley & Co. was formed in 1874 when Aaron Dennison moved from America to Birmingham (England). The company continued following his death in 1895, in 1905 the company name was changed to the Dennison Watch Case Co. and survived into the 1960s.

Camera House Price: £60.00

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The Wynne's Infallible Exposure Meter is shown in Accessories > Vintage Camera Accessories.

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Looking after your camera

Use a Camera Bag

A camera bag does more than just protect the camera against scratches and dust: It keeps it safe from rain because many are waterproof on the outside.

Be Very Careful Around the LCD Screen and Camera Lens

Use only special equipment to clean your camera’s LCD screen and camera lens. Buy a special cleaning kit that includes liquid solutions, microfiber cloths and brushes that have been specially designed to clean your camera lens.

Never Leave Your Batteries in Your Camera for Too Long
Many camera batteries are now alkaline or lithium formats. If you keep your camera with the batteries inside of it in a moist area, then the batteries can get corrosive. So if you’re thinking about just putting your camera on the shelf for several months, do yourself a favor and remove them.

Turn Your Camera Off Prior to Doing Anything

Before you do anything to your camera, always keep in mind that it should be turned off first. No matter what it is—swapping lenses, changing memory cards or disconnecting or attaching cables—your camera should be turned off.

Cold and Wet Weather Can Wreak Havoc on Your Camera Body
Take your camera out only in a waterproof bag. If the weather’s unusually cold, just wrap your camera in a plastic bag that has silica desiccant packets for the reduction of moisture. It’s also a smart idea to have a soft towel with you to wipe off any moisture, just in case it should get on your camera.

Good Memory Card Care Is Good Camera Care

Only transport your memory cards inside of a protective caseMake sure the memory cards stay dust-free at all times. When removing memory cards, make sure you do so indoors or in non-dusty situations.
Make sure that you keep memory cards only in cool places. Never keep them in places where they may heat up, like dashboards or glove compartments.
Never place your memory cards close to magnetic sources. Examples of magnetic sources are things such as audio speakers, TV monitors and actual magnets.

Use a Filter to Protect Your Camera Lens

The lens of your camera is naturally fragile. As such, it’s susceptible to scratches, cracks, dents…you name it. A UV filter will not only will you give your lens a fighting chance, but you’ll also enhance the quality of your pictures.

Condensation Can Be Controlled

Condensation normally happens when you move your camera between different temperatures.
Allow your camera a chance to naturally get used to the hotter environment. Don’t place it inside a closed plastic bag when transporting it between different temperatures! Just let the camera sit in the humid temperature for a while, until condensation disappears.
If this still doesn’t get rid of all of it, you can utilize a soft cloth to wipe away any remaining moisture and marks left behind from the condensation.