Walimex pro 800/8.0 DSLR Sony A

Normally, a long focal length of 800mm also has a total length of almost 80cm to the sensor plane.

To achieve a compact solution that is both handy and universally applicable, a trick was used for this lens.
The beam path is simply ‘folded’ by means of two high-precision polished ring mirrors. This results in this compact design of only 131mm in length - compared to the almost 80cm mentioned above. The minimum focusing distance also drops to 3.5 metres – instead of at least 10 metres for a lens objective.

The focusing is done manually. The lens can be used (depending on the camera) with aperture priority or manual exposure setting.

It is not technically possible to insert an iris diaphragm into the folded beam path. If light reduction is necessary, this is easily achieved using 2x or 4x neutral density filters. These are screwed in front of the rear lens. An M30x0.5 thread is provided for this purpose.

Practical: the lens has no fixed infinity stop. Focusing is carried out in a ‘pendulum’ fashion, whereby the point of focus is reliably found from out of focus to in focus to out of focus at any distance.

T2 connection, user tip: The T2 adapter is screwed onto the optics, then the lens is locked. After loosening the small screws on the side of the T2 adapter, the lens can be ‘raised’ – the index points upwards. Retightening the screws reliably secures the lens and adapter.

Advantages of a full-frame lens on a camera with an APS-C sensor

Save time in post-processing. A number of lens defects such as distortion, edge blurring or vignetting occur at the outer edges of the image.
If you use a lens designed for a full-frame format on a camera with an APS-C sensor, these areas are not used. This gives you maximum quality.
Additional post-processing time to correct lens defects is no longer necessary.

General notes:

• Download the full version of the operating instructions before setting up and using the item.
  
• Read the full version of the instruction manual carefully before using your product for the first time. It contains everything you need to know to avoid personal injury, environmental damage and damage to property.
  
• Carefully follow all the detailed safety instructions in the full operating instructions!
  
• Disposal instructions: Please dispose of the packaging and this product at the end of its service life in accordance with the laws applicable in your country.
  
• Choking hazard due to small parts: Keep the appliance and packaging material away from children and pets.
  
  Danger of blindness and damage to the eyes
  
• Do not look directly at the sun or strong light through the lens. This can lead to blindness.
  
• Do not store the lens without the lens cap attached in a place exposed to direct sunlight, e.g. in a vehicle. Direct sunlight through the lens may be focused and cause a fire.
  
• Keep the lens out of the reach of children. Failure to do so may result in accidents or injuries.
  Precautions for use
  
  
• To use the lens safely, attach or remove it with the camera switched off.
  
• Take care not to touch or contaminate the contact point of the bayonet. If electronic signals are not transmitted smoothly between the camera and lens, this can lead to a malfunction.
  
• Do not apply excessive force to the lens attached to the camera. This may cause damage to the lens and/or camera.
  
• It is recommended to use a stable tripod. If a stable tripod is not used, it may collapse, causing damage to the camera and/or lens.
  
• If the lens is stored in a hot place, it may be damaged or deformed, which may affect its performance.
  
• Ensure that the lens does not come into contact with water or other liquids and store the lens in a dry, well-ventilated place.
  
• If the lens gets wet or if you use the lens with wet hands, this can lead to product failure, fire or electric shock.
  
• Avoid direct sunlight and do not store the lens with naphthalene or mothballs.
  
• Do not use the lens in a place with strong temperature fluctuations. In particular, if you bring a lens that has been cooled down in a cold place to a warm place, the humidity may concentrate on the outside or inside, resulting in defects or mold growth. In such a situation, store the lens in a special camera bag and do not take it out until the temperature of the lens has adjusted to the ambient temperature.
  
• If the surface of the lens is dirty, dust it off with a lens blower or a brush and wipe the lens with a clean, soft cloth (cleaning cloth, cotton cloth, etc.).
  
• When dusting or cleaning the lens, do not use organic solvents such as thinner, alcohol or benzene, but rather ethanol or lens cleaner.
  
• Do not modify or alter the lens, as this may cause the camera to fail. Modified lenses invalidate all warranty claims and cannot be repaired.

• Walser GmbH
• Wilhelm-Lexis-Str. 8
• 52249 Eschweiler
• DE
• service@fotowalser.com