YouTube video on cleaning lens everyone should see

[eli griggs]

I'm posting this YouTube link
on the cleaning of a Hasselblad lens, because it is so well presented and shows the tools and materials needed to do this work and similar, on other camera lenses.

This person has other every good videos in this vein, so check them out when you have time to see them through.

This is an important resource.

IMO.

 

[Donald Qualls]

Funny, I just watched his video on cleaning oil from the shutter blades in an RB67 50mm lens.

 

[eli griggs]

I feel his videos are very instructive in their completeness and he explains very clearly as he works with the viewer to ensure very usable instructions/lessons, that most competent people will be able to learn and use for their own kit.

IMO.

 

[Jim Blodgett]

Awesome resource, Eli. Thanks.

 

[shutterfinger]

Where does one get those "rubber thingies"?

 

[eli griggs]

I think they, at least the gray ones can be found in the plumbing departments of home stores like Home Depot and Lowe's.

I need a set of both myself but instead of a compass ground down to fit the blade access on these rings, I may just spring for a proper spanner.

I'll send for the Eclipse cleaning fluid and PEC pads later today, online.

It would be nice, for me, to find a 'V' series lens for cheap to practice on, long before my good lenses need work, as I think that working on one 'V' lens, including the shutter, should be very similar to another focal length, floating elements/lenses being possible exceptions.

 

[shutterfinger]

I think they, at least the gray ones can be found in the plumbing departments of home stores like Home Depot and Lowe's.

Not that I can find on line. The tapered ones are called funnel adapters.

 

[etn]

Thanks for posting.
This kind of video makes me wonder:
It seems strange to me that no kind of adjustment is needed when re-assembling the lens...
What is the tolerance on the position of each element? Is there no risk of turning a good lens into a lemon by doing this kind of operation?

 

[logan2z]

Very informative video, thanks for posting.

I'd be into this project for exactly 30 seconds before I slipped and took a chunk out of a lens element so I'd never attempt it. But fun to watch someone else do it.

 

[eli griggs]

Yep, I spend a good bit of my TV time in the evenings, watching videos like that on many topics.

In fact, other than watching one series at a time with my Roseann, who is working third shift, before she leaves in the evening, I have mostly given-up on cable, and it's been years since I've watched broadcast, so I can spend that time learning while watching many topical videos, like this on.

I agree it is nerve wracking to think of gouging a lens, but that is one reason why I want the spanner, instead of the hacked compass.

Cheers, Be Safe, Be Happy and Godspeed to all.

 

[shutterfinger]

It seems strange to me that no kind of adjustment is needed when re-assembling the lens...
What is the tolerance on the position of each element? Is there no risk of turning a good lens into a lemon by doing this kind of operation?

The barrel the lens elements fit into have machined surfaces that are not moveable. The lens element sits on the machined surface then the retaining ring threads down and holds the element in place. If an element is put in reversed the retainer will likely not fit properly, the aperture or shutter blades may not operate or similar problem.
Rubbing spots off with a scotchbrite, steel wool, scratching an element with a slip of the spanner, or dropping an element on a concrete floor.

 

[thuggins]

Where does one get those "rubber thingies"?

Sink stoppers don't work the best. I've made some tools using rubber cement to attach sheet rubber to dowels or pipe caps with limited success. Amazon sells a tool with nested pieces giving a wide range of sizes. The issue with these is they tend to collapse under torque as they are "hollow". I recently ordered some natural rubber stoppers (a whitish tan, not black) from a place that sells brewing supplies. These are very grippy and I'll probably end up ordering additional sizes.

All that being said, I've rarely had much success with "rubber thingies".

 

[Pieter12]

No way.

 

[GLS]

Yeah I've been aware of this guy's videos for years now. There's some really good info there.

 

[pentaxuser]

I think that we have to realise that he may not be doing this for the first time so he has a kind of confidence and a set of practised-hands that comes from experience. Even he had some difficulty when starting the unscrewing and that former pair of compasses properly altered to fit the slots is an essential tool that has to be good. Clearly when struggling with the grip needed you need very steady hands and I suspect an inner confidence that nothing will go wrong

However it is very well explained

pentaxuser

 

[eli griggs]

Up Date on Cones.

I just received a nine piece (9) white 'rubber' funnel adapter set from one of many sellers on eBay.com, and am very happy with it.

The largest cone has an opening fo about 8.cm and the smallest, about 9.5mm.

There is a solid piece to this set with a small face of 8mm +.

The wall thickness, on the largest is about 6mm, the smallest cone, about 2.8mm.

I have already used one of these to remove the front ring on a Nikon 50mm 1.8 'E' series lens that has never been dissembled, after leaving the factory, and it worked like a charm.

If anything, the only hick-up was telling how quickly the lens ring was loosened.

By the way, these are known as Buchner flask adapters for Lab work and prices vary with colour, seller, etc, but I spent about $13 u.s. AND I'M VERY HAPPY WITH WHAT I RECEIVED.

By the way, white and coloured rubbers are weaker than traditional black rubber, so if you find a black set, you may be better off getting that, rather then others colours, and buy the 9 piece sets, as they are durable enough in feel, IMO.

Lastly, I believe that if needed, a couple of boxes of Harbor Freight "O" ring assortments in SAE and Metric, can be used with these cones or simple High Density Foam, such as the shoe box sized foam blocks being sold for exercise.

Check out your local Goodwill and S.Army stores, etc, for used blocks you will cut down as part of your kit.