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Taking stuff apart!
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PostPosted: Wed Nov 09, 2011 12:30 pm    Post subject: Taking stuff apart! Reply with quote
I've been buying all kinds of lenses recently.
I seem to raiding anywhere that sells used stuff and buying up whatever they have (max £6 to date).

I've been pretty lucky so far but just last night I had what looked like a mint 28mm Sigma come apart in my hands and from the same batch a 29mm Pentacon with all kinds of haze and fungus.

What do I need to get started doing repairs? Can I do the basics with a decent set of jewellers screwdrivers?

I've been reading through this forum and I'd like to start out simple by cleaning the odd element.

I'd like to do it as cheaply as possible as I have a habit of making things worse once I start tinkering.

TIA


PostPosted: Wed Nov 09, 2011 1:24 pm    Post subject: Reply with quote
You read the sticky postings here:
http://forum.mflenses.com/equipment-care-and-repairs-f6.html

There is a lot of info about fungus cleaning and tools for lens repair.

Probably you find even more informations here on my DIY link-directory:
http://www.4photos.de/camera-diy/index-en.html


PostPosted: Wed Nov 09, 2011 1:59 pm    Post subject: Reply with quote
Been working my way through the sticky postings and now your website.

The hardest part seems to be the actual disassembling - are there any beginners guides?


PostPosted: Wed Nov 09, 2011 4:18 pm    Post subject: Reply with quote
This is certainly not the response you are looking for but the best beginner's guide is to take a few things apart first. Written word guides are helpful but I truly believe one needs acquire a "feel" for basic disassembly.

Get a few hopeless samples from a flea-market and learn basic lens construction. It will help greatly in the long run.

I feel the most essential tools are:
a set of screwdrivers
a spanner
vinyl/latex gloves for touching elements
cotton swabs (q-tips)
high quality lens cleaner (made especially for optical coated lenses)


PostPosted: Wed Nov 09, 2011 7:44 pm    Post subject: Reply with quote
themoleman342 wrote:
This is certainly not the response you are looking for but the best beginner's guide is to take a few things apart first. Written word guides are helpful but I truly believe one needs acquire a "feel" for basic disassembly.

Get a few hopeless samples from a flea-market and learn basic lens construction. It will help greatly in the long run.
...


Yeah, read some basics, and then learning by doing with cheap lenses. Probably after that further reading.
And take cheap lenses for the learning process. Avoid zoom lenses - they are quite more problematic.


PostPosted: Thu Nov 10, 2011 12:18 am    Post subject: Reply with quote
+1 avoid zooms and lenses with floating elements, and I firmly believe that the Helios 44-2 is a great lens to learn the basics on.


PostPosted: Sun Nov 27, 2011 11:01 pm    Post subject: Reply with quote
Lightshow wrote:
+1 avoid zooms and lenses with floating elements, and I firmly believe that the Helios 44-2 is a great lens to learn the basics on.


When taking one apart keep the disassembly in a shallow pan or plastic container on top of a clean white cloth such as an old pillow case. Those little screws will disappear right in front of your eyes. As you take them out put them in a small plastic bowl or even a sandwich bag. Label where they go on the bag and use a different bag for each set of screws. Then you can put them with the larger pieces as described below.

Take photos every step of the way.

As you take it apart put the larger pieces on a white cloth starting at the top left and go left to right in rows from top to bottom. Re- assemble by going right to left and bottom to top. Sounds silly but it makes the job so much easier.

Hope this helps.


PostPosted: Sun Nov 27, 2011 11:48 pm    Post subject: Reply with quote
jewellers screwdrivers? NO! Not unless you have very small fingers. Smile Look at Electronics screwdrivers instead. The center body is generally larger and easier to grip.


PostPosted: Mon Nov 28, 2011 12:22 am    Post subject: Reply with quote
walter g wrote:
jewellers screwdrivers? NO! Not unless you have very small fingers. Smile Look at Electronics screwdrivers instead. The center body is generally larger and easier to grip.


I use a small one from Home Depot with interchangeable tips. Has phillips and flat blades of four different sizes that store in the handle. Very small but the butt cap pivots allowing easy screwing with one hand. I also have a small magnetizer de-magnetizer so the screws will stay on the tip.

http://www.homedepot.com/Tools-Hardware-Hand-Tools-Screwdrivers/h_d1/N-5yc1vZas0k/R-100074336/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053

I also use a set of magnifying eyeglasses like a jeweler or doctor uses. Bought them at www.Harborfreight.com. They have LED illumination too.

http://www.harborfreight.com/magnifier-head-strap-with-lights-38896.html


PostPosted: Mon Nov 28, 2011 9:02 am    Post subject: Reply with quote
Be careful.......with Japanese lenses you need a Japanese version of Phillips, this might only be a problem with screws that you need to exert maximum force, and if using ordinary Phillips will ruin the screw.
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