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Clean inner core of canon 75-300 lense - Canon 75-300mm f/4-5.6 III USM EF Lens

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How to disassemble a Makinon mc zoom lens

first off, you need special tools to get at the inner elements of a zoom lens - i've been working on lenses for 20 years, and i still don't have every tool needed sometimes :-)

second, makinon lenses are not really worth anything, even if they are in perfect condition - my advice is to buy a better zoom used that is in perfect condition already, since you would have spent that money in tools to try and clean this one, and everyone screws up the first lens they ever try to take apart...

some good lens brand names are sigma, tamron, kiron or any with the same camera name as your camera (canon, nikon, etc)

stick with japan made optics - can't go wrong usually.

good luck...

Nov 30, 2014 | Cameras

1 Answer

Have a brand new EOS 100D with Canon image

Have you actually cleaned the contacts or are you just looking at them and they "look" clean? Clean them with a cotton swab lightly dampened in rubbing alcohol.

Feb 28, 2010 | Canon EOS Digital Rebel XS / 1000D IS...

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I´ve been trying to use my Quantaray 70-300 mm lenses with my Canon EOS 450D. It gave me Err01 message (communication fault), I cleaned the lenses and it started taking the pictures but one at a time,...

Canon leads the current world market in lenses with their L-series lenses using fluorite rather than other manufactures use of glass. however, they do not make money when we buy 'other' brands of lenses and have kept a certain amount of their body to lens, coding as propriatary. the problem you stated is a common complaint with all second manufactured lenses and the only real solution is to put a canon lens on a canon body.

Sep 28, 2009 | Sigma AF 70-300mm f/4.0-5.6 DL Macro Super...

1 Answer

Fd 50mm 1:1.8 s.c. Dirt on inner surface of inner-most lens element

You can clean this off by opening the camera and GENTLY blowing it out with canned air. DO NOT tilt the can. The moisture will damage your lenses.

Sep 16, 2009 | Canon Cameras

1 Answer

Manual Canon 50mm FD lense will not focus!?

In that case the linkage between the movable parts of the lens group and the focussing ring has failed.

What follows applies to most lenses; I have a Canon 50mm FD to hand but as it works perfectly I've not needed to dismantle it so far but have repaired many others.

When you turn the focus ring there are usually two pegs which engage into helical slots cut into the focussing ring, these are hidden within the lens and you won't see them unless the lens is dismantled. The pegs are usually rounded to make the passage along the helical slot even smoother and each one is fixed to the inner lens barrel by a screw. On older lenses, the grease inside can dry out a bit, especially if the lens remains unused, when this happens the pegs may either shear off or simply become unscrewed and drop off. The gummy grease may hold them so you won't always hear a rattling part inside.

To fix it, you carefully dismantle the lens to the minimum extent you can get away with. You'll need good light, patience and a set of good quality crosshead precision screwdrivers. Normally you start with the screws on the mounting flange and watch out for small springs and detent balls which tend to escape to freedom never to be seen again. Some of the screws are usually hidden beneath the rubber grip on the focussing ring, and you remove this to check by carefully lifting an edge and then rolling it back over itself. It may need re-gluing afterwards. Clean out dried grease as you go and apply a small amount of thick grease to replace it on reassembly: less is far better than too much! Some of the screws may need thread lock applied to them when they go back in, but you're better off leaving this as your first time lens repair usually has to come apart again due to an error in reassembly.

Be prepared to ruin this lens as it's your first lens repair. The good news is that auction websites have plenty of other cheaply and in full working order, just make sure to ask if the iris (aperture) works smoothly and snappily and that the lens does not have the dreaded lens fungus on the glass elements (a patchy white haze). You can also usually get these lenses for free on Yahoo FreeCycle and a camera body and other goodies normally come as part of the offer. FreeCycle is how I've collected various Nikons, Canons and Pentax SLRs and lenses over the last year to add to my existing Olympus gear.

I hope that I've helped you, if so please return the favour by rating my answer.

Jul 08, 2009 | Canon Photography

1 Answer

Clean dust inside the lenz

Don't. Unless there are some really big specks of dirt inside the lens then they will have no effect at all on picture taking. To prevent the problem getting worse always store your lens with it's front and rear caps on and inside a lens bag. Also make sure that your camera bag is clean and isn't shedding fibres from the inner linings.

Dismantling your lens to clean it is really a job best left to a professional who will then additionally check and clean/lubricate the moving parts inside the lens.

Jul 03, 2009 | Tamron 28-300mm f/3.5-6.3 DI XR for Canon

1 Answer

Water inside the lens (Canon EF-S 17-85mm F4.5-f5.6 lens)

if it is only fogged you can blow hot air on the lens while fully zoomed in and after the water has evaporated, zoom out to compress the moist air out. do this several times.

May 23, 2009 | Canon Cameras

1 Answer

Friction in zoom, Sigma AF 70-300mm for Canon-EOS

Its more like a distorted inner zoom barrel or sand and dirt inside  the inner barrel will need to be replaced or you need to dismantle and clean out 

Nov 09, 2008 | Sigma AF 70-300mm f/4.0-5.6 DL Macro Super...

1 Answer

Cleaning the inside lens

To access the inner optics on these compact digital cameras the lens must be disassembled from the inside out. Usually the camera casing has to be removed, boards and connections moved out of the way, and the lens assembly actually removed from the camera. At that point the lens can be taken apart and the inner optics accessed. In other words, yes, this is a job for a professional. It is also probably not worth the cost just for a couple specs of dust. These lenses are not sealed. This is why the dust gets in there to start with. If you get a can of compressed air and carefully blow into the gaps between the lens parts in different directions somtimes you can get enough air through to blow off the inner lenses. This does not often work though. David Millier Advance Camera Repair

Mar 12, 2007 | Sony Cyber-Shot DSC-P150 Digital Camera

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