Jupiter-8 disassembly and maintenance

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For Jupiter-8, disassembly and maintenance will be required if the grease has dried or a fungus has started. The disassembly lens is very easy, and its maintenance does not take much time.

In short, Jupiter-8 is split into two parts by the method of interaxial scrolling of two parts - the helicoid and the lens block in these lenses are screwed into each other. Marks during parsing can not be installed, since, in principle, the glass is simple to disgrace. The main thing is not to unscrew the helicoid to the end, since this is the only place in the lens that has a multi-start thread.

Disassembly and maintenance in stages:

We unscrew the lens block Jupiter-8 from the helicoid, do not lose the gaskets

Jupiter-8 disassembly and maintenanceJupiter-8 disassembly and maintenance

We loosen the three screws of the focus ring, having previously set infinity, remembering the location of the rings. The center of the depth of field scale should, after assembly, be opposite the aperture value on the front lens frame ring.

We loosen the three screws of the ring with a sharpness scale and remove the ring

If it is necessary to add lubricant, at this stage we twist the parts of the helicoid and add lubricant

If it is necessary to rinse and lubricate everything, then unscrew the helicoid stopper and unwind its parts as much as possible without separating them

After washing and lubricating, we assemble in the reverse order.


  • The Jupiter-8 helicoid thread is multi-threaded, if you disconnect the helicoid, then fill it in or put marks in order to assemble it correctly later
  • The outer screws that hold the rings are steel, they like to turn sour in their places, therefore, in order not to spoil the appearance, they must first be shed with something like WD-40

Let's move on to the Jupiter-8 lens block:

We remove the spacer rings, unscrew the locking screw and the restrictive ring, it can go tight.

Then we unscrew the diaphragm drive screw and remove the diaphragm drive ring.

We remove the old grease, put a new one. The diaphragm ring is lubricated on both sides (look at the old grease)

If you need to wash the petals, then unscrew the three screws of the frame of the front lens

We remove the lens and use a special key to unwind the ring holding the gluing behind the front lens.

Unscrew the rear lens.

We wash the Jupiter-8 block, dry it, assemble it back.


  • If there are gaskets, in no case do not lose them
  • The diaphragm mechanism is best left dry. Grease is placed only on the diaphragm ring.
  • I wash the stained lenses with detergents, wipe them clean using grandfather's methods - with candle soot on a cotton swab.
  • Wash galoshes in gasoline


Unlike early hulls, Jupiter-8 is easier to maintain after restyling.

Jupiter-8 disassembly and maintenance video (black, late version of the hull)

Jupiter-8 disassembly and maintenance video (light, early version of the hull)

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