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Telescopes and optical products
maintenance

​ At Astronomical House TOMITA, we make uncompromising adjustments with the guidance of astronomical telescope manufacturers and technology cultivated over many years of experience.

天体望遠鏡のメンテナンス

【お知らせ】

2023年12月よりメンテナンス依頼の受付を一時休止いたします。

詳しくはこちらをご確認ください。

​Astronomical telescope maintenance

​We have prepared 3 types of services so that you can choose maintenance according to the condition of various lens barrels and the required work.

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Optical system maintenance
-Maintenance of the optical system-
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Ⓐ Disassembly and cleaning of objective lens and reflector

​Disassemble each optical system and clean the optical surface.

Wipe off visible mold and dirt.

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Ⓑ Optical axis adjustment

Each optical system is built into the lens barrel,

Adjust the optical axis.

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​Ⓒ Star image test

using test equipment,

Check the status of the star image after adjusting the optical axis.

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Ⓓ Other inspections and adjustments

​Other inspections and adjustments are performed upon request.

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Ⓔ Cleaning the attached finder surface

Carry out maintenance (cleaning the surface) of the finder attached to the lens barrel.

We accept disassembly and cleaning for +2,200 yen.

​Basic charge(tax included)
- The price is set according to the manufacturer, optical system, equipment condition, and work content.ー
  • ​Refractive lens barrel (achromatic/apochromatic) ¥8,800~

  • Reflective barrel (Newton-Cassegrain)    ¥9,900~

  • ​Composite barrel (catadoptric)      ¥9,900~

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overhaul
-Refreshes the entire lens barrel-
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The following work is added to "optical system maintenance"
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Ⓕ Cylinder interior wiping cleaning

Wipe off the dirt and mold attached to the inside of the cylinder.

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Ⓖ Replacing the grease on the focus adjustment part

After cleaning the deteriorated grease, grease up,Adjust for smooth focusing.

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Ⓗ Exterior cleaning

Removes dirt from the exterior.

​Basic charge(tax included)
- The price is set according to the manufacturer, optical system, equipment condition, and work content.ー
  • Refractive lens barrel (achromatic/apochromatic) ¥17,600~

  • Reflective barrel (Newton-Cassegrain)   ¥16,500~

  • ​Composite barrel (catadoptric)      ¥16,500~

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Overhaul menu options
​Stray light prevention coating in cylinder(tax included)
Upgrade the stray light prevention coating inside the cylinder with a special paint.  
​Please let us know when requesting overhaul.
  • Refractive lens barrel (achromatic/apochromatic) ¥7,700-

  • Reflective barrel (Newton-Cassegrain)   ¥8,800-

  • ​Composite barrel (catadoptric)      ¥8,800-

​After painting
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s-FC-100筒内低反射塗装 (1).jpg
​before painting
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Other maintenance

 

[Common to reflective lens barrel and compound lens barrel]

  • Reflector re-plating coating (AlSio, Al enhanced reflection, etc.) Quotation

​ *Set according to the size (diameter and thickness) of the glass material.

After re-plating
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before re-plating
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​[Refractive barrel]

 

  • Objective lens surface cleaning - the objective lens is not disassembled from the cell, only the surface is cleaned ¥8,800-

 

[Both refracting and reflecting barrels]

  • Optical axis adjustment (no need to disassemble) - When the optical axis can be adjusted with the adjustment mechanism attached to the cell (push-pull screw, etc.) ¥8,800~

  • ​Optical axis adjustment (requires disassembly) - When adjustment is not possible with the adjustment mechanism attached to the cell and disassembly and precision adjustment of each lens is required ¥11,000~

​[Compound barrel]

  • Optical axis adjustment (no need to disassemble) - When the optical axis can be adjusted with the adjustment mechanism attached to the cell (push-pull screw, etc.) ¥11,000~

  • Optical axis adjustment (requires disassembly) - When adjustment is not possible with the adjustment mechanism attached to the cell, and disassembly and precision adjustment of each reflector is required. ¥15,400~

 

[Common to refracting, reflecting, and compound barrels]

  • ​Others ー We accept requests for maintenance, repair, modification, etc. Quotation

Eyepiece maintenance

Eyepieces are disassembled, and each optical surface is cleaned, assembled, and centered.

 * Deterioration of the lens adhesive on the bonding surface cannot be repaired.

*Some old lenses and some overseas products cannot be disassembled due to adhesion of screwed parts or use of adhesive.

[24.5mm sleeve]
[31.7mm sleeve]

​Number of components Base price (tax included)

~2 sheets   ¥2,200-

3 or more   ¥3,300~

other       Quotation

​Number of components Base price (tax included)

~ 4 sheets   ¥3,300-

6 pieces or more    ¥5,500~

zoom   ¥11,000~

other      Quotation

[50.8mm sleeve]

​Number of components Base price (tax included)

~ 4 sheets    ¥3,300

6 pieces or more   ¥5,500~

zoom   ¥11,000~

other      Quotation

Maintenance of optical accessories

Each optical system accessory is disassembled and each optical surface is cleaned.

 * Deterioration of the lens adhesive on the bonding surface cannot be repaired.

*Some old lenses and some overseas products cannot be disassembled due to adhesion of screwed parts or use of adhesive.

[Correction lens ]

​種別         _cc781905-5cde -3194-bb3b-136bad5cf58d_       Basic price (tax included)

Reducer   ¥5,500~

flattener

extender  ¥5,500~

barrow

each filter  Quotation

otherQuotation

[Visual accessories ]

Type Basic price (tax included) 

zenith prism  ¥2,200-

zenith mirror   ¥1,650-

other       Quotation

[Finder ]

Diameter Base price (tax included)

~30mm  ¥3,300-

~50mm  ¥5,500-

51mm~  ¥8,800~

other      Quotation

*Additional ¥1,100 for replacement of crosshairs

maintenance of binoculars

Due to the adjustment facility, we are currently suspending acceptance.

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