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Daily maintenance knowledge of telescope

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Daily maintenance knowledge of telescope
Latest company news about Daily maintenance knowledge of telescope

1. Situations that are likely to cause damage to the lens
Shooting in areas with a lot of wind and sand
After shooting, the lens should be cleaned well. It is possible that some dust will enter the inside of the lens and bond with grease, causing mechanical parts to wear.
high humidity areas
Mold likes a humid environment. If the lens is moldy, the mold spots are usually deep, and it is very troublesome to deal with.
In a relatively humid environment (such as the south), it is best to store the lens in a moisture-proof box to prevent mold.
If there is no condition, put a desiccant in the lens case.
Avoid blowing directly from the air outlet, and do not blow the lens with a hot air gun. It may cause the failure of the adhesive glue in the mechanical part or the glue in the glued lens, and the lens will be unevenly heated and cracked.
low temperature environment
Different lenses have different optimum working temperatures. If you shoot at a place lower than minus 20 degrees, you need to replace the lubricating oil. Otherwise, if the temperature is too low, the lubricating oil will become very viscous.
It is very cold outdoors. After taking the lens indoors, it is best not to use it immediately. It needs to stand for a while, otherwise condensation may form inside the lens.
high temperature environment
Avoid direct sunlight, cover the front and rear covers at different times, the grease on the lens will react quickly, clean the shell frequently to avoid the growth of microorganisms.
Problems with focal length equipment
The focus and aperture limit of some lenses are not stable enough, and the limit may break or fall off. In this case, it is recommended to adjust the strength of the focus motor.


2. How to check the lens
Visual inspection:
Observe whether the lens shell is deformed; whether the focus ring, aperture ring, and zoom ring rotate smoothly, and whether there is any looseness; shake the lens slightly, whether there is shaking or abnormal noise; whether the front lens and the rear lens are scratched; Mildew, large dust; observe whether the matting paint is intact and whether the glued lens is fogged.
Projection inspection: Put on the projector and observe whether the projection is clear, and the left, right, top, bottom images are symmetrical. Measure whether the focus value is accurate, and decide whether to adjust the lens according to the situation. Rotate the focus ring from different directions to a certain scale, and observe whether there is a return difference phenomenon. Zoom the lens and observe whether there is out-of-focus phenomenon.
The correct way to clean the lens
Cleaning of external mechanical parts:
For the bayonet part, use a cotton swab dipped in absolute alcohol to clean it. Be careful not to use too much solvent. The ideal situation is to wipe it off immediately.
For the shell part, first blow off the dust and sweep it with a soft brush. If there is dust that is not easy to clean between the gears, you can use an old toothbrush to sweep it off. Finally, use a cotton ball dipped in a small amount of anhydrous alcohol to wipe the shell. Be careful not to let the alcohol seep into the adhesive part behind if the logo is pasted.
To wipe the lens (appearance) and lens, different cleaning agents should be used.
Use special lens paper, dipped in a special cleaning agent for cleaning.
Pub Time : 2023-05-31 14:45:03 >> News list
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