Advertisements

Daily Archives: September 5th, 2012

Camera lens cleaning

It is very normal that the lens of a camera gets dirty… especially for TLRs that are at least 20 years old.

Very often photographers need to clean their lens. Many time i have seen newbies that using inappropriate method to clean lenses that almost destroy the surface coating.

Below is an articles from bhphotovideo on how to properly clean a lens.

 
The first question most people ask when shopping for a new lens is “Is it sharp?”, yet if you were to pop the lens cap off that new lens a month down the line there’s a 50-50 chance you’ll find dust and a fingerprint or two on it. And if it’s not on the lens, there’s a 50-50 chance there’s dust or a fingerprint or two on the “protective filter,” which was purchased to keep dust and fingerprints off that new lens. And that’s on a DSLR.

If it’s a point-and-shoot camera, there’s even a greater chance of dust or fingerprints on the lens because when you turn the camera off, the lens usually slips behind little louver blades that A) protect the lens, and B) hide the fact there’s dust or a fingerprint on the lens.

Checking your lens for dust and smudges is something you should do on a regular basis, not only to ensure you’re getting the sharpest possible pictures, but also because a fingerprint or alien smudge left to “ripen” can cause permanent damage to the lens coatings. Keeping your lenses clean isn’t rocket science, but nonetheless, is a chore that should be performed carefully, thoughtfully and with the proper tools and techniques.

Dust and smudges on the front element of your lens (or your filter) are the easiest to spot because they’re front and center. While dust and smudges on the front element can diminish sharpness and contrast levels, you lose greater levels of sharpness and contrast when you have dust or smudges on the rear lens element because that’s the one that ultimately projects your image onto the camera’s sensor (or film). If your “projector lens” isn’t clean, your pictures won’t be sharp as they can be.

The Proper Tools for Cleaning Lenses and Filters

The Proper Technique for Cleaning Your Lens or Filter

The surface of your camera’s lens has special coatings designed to maximize contrast, color saturation and color fidelity as well as minimize flare. These coatings can be scratched easily, and as such, when cleaning your lens it’s always a good idea to keep things simple. If dust or loose grit is the only villain, the best way to get rid of it is to gently brush the surface of the lens with a soft, camel-hair brush or give it a few blasts of air using a bulb-style air blower. Avoid using pressurized canned air. Avoid grinding grit into the lens surface with a cleaning cloth.

Smudges and fingerprints take a bit more effort, and here too, you should be as gentle as possible. Start by taking a soft micro-fiber cloth or a piece of lens tissue (folded, not bunched up), breathe onto the lens surface (never dry-clean a lens) and gently wipe the lens surface in a circular motion. Repeat if needed using a fresh piece of lens tissue or clean portion of the micro fiber cloth. If this doesn’t work, try dampening the tissue or cloth with a few drops of methanol (wood alcohol) or alcohol based lens-cleaning fluid and try again by gently wiping the lens in a circular motion.

Alcohol or lens-cleaning fluid should never be applied directly onto the lens surface. Doing so can possibly harm the lens coatings and/or compromise the adhesives that hold the lens elements in place.

If you’re out on a shoot and need to clean dust or smudges off your lens, and do not have a micro-fiber cloth or lens tissue with you, a cotton t-shirt or similar cotton-based material (preferably old and not freshly starched) should do the job equally well. What you never want to use is facial tissue, paper towels, polyester-based material, or any type of coarse or abrasive fabric or paper surface.

If the above procedures fail to do the job, or if gritty particles that can scratch the lens coatings are embedded in the smudge, you’d be wise to have a qualified technician address the problem.

If you can see a few bits of dust floating around between your lens’s inner elements, they’re not worth fretting over, as they will have little if any visible impact on the sharpness levels of your photographs, and are certainly not worth the time, trouble, or expense of having the lens taken apart, cleaned and reassembled.

Dust on your Mirror and Imaging Sensor

A common misconception about dust is that you can see it in your camera’s viewfinder. The truth is the specs of dust you see in your viewfinder are not on your lens, but on your camera’s mirror. These dust marks, as distracting as they may be, do not affect your picture quality. Now before you take your lens off and try to clean your mirror, be advised the mirror in your camera is a surface-coated mirror finish, which can be permanently scratched with little effort on your part. Never, ever try blasting dust off with canned air, because you’ll most likely pit or scar the mirrored coating, or even blow the mirror off its hinges altogether.

The most drastic action you should take is to try removing the dust particles by gently blowing them off with a bulb-type air blower. If this doesn’t do the trick, bring the camera to a trained technician or simply live with it because as noted above, dust on the mirror is annoying, but will not affect your picture quality.

Dust marks on your image files―specifically, blurry smudge-like marks that appear repeatedly on the same portions of all of your image files―are caused by dust on your camera’s imaging sensor. Here too, the most drastic and least invasive action you should try on your own is to remove the lens, set your camera to the mirror-lock position, and gently blow it off with a bulb-style air blower while holding the camera face down. If this does not work, it’s recommended that you have a trained technician clean your camera’s sensor. And just as you should never blast your mirror with canned air, the same goes for your camera’s imaging sensor.

Advertisements

Vintage/ Antique camera repair/ restoration tools

Kyphoto.com is one of the most reliable and resourceful sites for camera repair information. They provide a list of useful camera repair tools, which are asked by many people.

Are you a DIY guy trying to fix or rescue your own precious cameras? If yes, there are the tools that you need.

Screwdrivers
Niwa brand drivers are our favorites because they have big handles and the replaceable tips are very strong (but it doesn’t mean they are unbreakable!). The T-handle is a nice addition. A Sears set of six (4 slot and 2 phillips in a blue plastic case) is handy to keep around when a special size blade needs to be ground. This set is cheap and made of good, hardened steel.
Pliers
Don’t think one can ever have too many different pliers. Sears has a set of 4 mini pliers that is a good start. A tool should be comfortable… A set (round and pointed nose) of 4″ Visegrips are excellent for holding parts during filing or precise bending. A set of cheap fixed tip snap ring pliers with the tips filed to fit pin face screws. Only use this if the screw is so tight the friction screwdriver won’t remove it. The plier set you see in this picture was bought at Sears for $9.99.
Tweezers
Plastic surgical tweezers are the best for general parts handling. They are big and stout. But a set of metal, straight and curved, are sometimes required.

Lens spanner
Depends from person to person and job to job if spanners are necessary. Especially on really tight lens rings they are invaluable. The replaceable tip ones are best. Also S. K. Grimes makes an excellent looking spanner.
Needle Files
A cheapie set of 10 different cross-sections has worked fine.
Set of Batteries
If I had a nickel for every time a friend has shown me this “broken” camera and all I did was put in a fresh battery… well, I’d have at least a dollar! Seriously, keep a set of various batteries around. I have a short length of wooden 2×4 with holes drilled in it to organize my batteries.

Filter Ring Remover
Most camera shops carry cheapie filter ring removers. The big plier-like ones seem best. I don’t have a set of these big, nice…expensive…ones, but they are on my Christmas List.
Head Loupe
Next to my Tee-handle Niwa driver I use this the most. Could be my aging eyes?? I use it in diagnosing parts or checking lens element cleanliness, as a face shield while making parts with the rotary tool, any time I solder… gosh, all the time.
Rotary tool
Sears offers a nice 5 speed model. When you advance into making/modifying parts this tool will be your closest friend. I’m amazed that of my numerous bits I only use about four 99% of the time. Cutoff wheel, pointed grinding stone, rasp (looks like an end-mill) and a small ball tipped cutter. The first three are 1/8″ shank and the last is 3/32″ shank.
Soldering Iron
I use a 45 watt Radio Shack pencil type plugged into a variable temperture control unit. My favorite tip is a spade type I bent to about 45 degrees.
Friction screwdriver
Make from a short length of round wooden dowel (or broom handle). Just glue a piece of flat rubber on the end. A couple different diameters is handy. These are used mostly for removing the ring around wind levers. I use it even if the ring has grooves.
Crochet hooks
Makes excellent spring hooks and probes. I use a set consisting of US10, 12 and 14. And I have an extra bent US10. The 10 is especially useful for spinning off lens rings after initial loosening.
Artist style paintbrushes
For internal cleaning… Flat ones are better than the pointed.
Toothbrush
Exterior cleaning.
Rubber pads
For loosening anything you don’t want to scratch…like everything. Start collecting various soft rubber pads. Anything can be used: furniture foot pads, sink stoppers, door stops…anything. A few sheets of soft rubberized cloth (dental dam) works well.
Tool holder
Don’t know about you but my desk gets cluttered with tools when I’m tinkering. The best thing I have found to organize the tools currently being used is a 78 cent plastic drill bit holder. It is made to hold 26 bits from ½” to 1/16″. Holds everything from pliers to screwdrivers to…well, everything I normally use. Alternately a piece of 2×4 with custom drilled holes would be perfect…but for 78 cents, I can be lazy.
Parts tray
A very necessary tool of organization! You can spend money on a store bought tray or… got a buddy that plays golf? or play yourself? The plastic egg crate-like containers that some brands of golf balls come in are near perfect. See thru is better…
Big, strong magnet
To find and pick up small parts you WILL drop.
Machinist’s dividers
Best for pin faced screws like shutter speed dial screws, self timer screws, etc.
Wooden chopstick
To insert in between the fork of the rewinding shaft to unscrew the rewinding knob. Does not scar paint as opposed to the normal screwdriver handle.
Toothpick or inkpen
Once the retaining ring is loosened, unscrew the remainder with one or both of these two items. Inkpen (no ink, of course), if extra strength is needed. Toothpick, for smaller notches and good for depositing small drops of lubricant or glue.
Film can
Need to store a bunch of little parts? If you shoot Fuji film like I do, you can write the camera name on the side of the white container. I have three or four from off brand film that are clear. They are the best.
Film cans
If one is good, then two is better and seven is perfect. Six empty film cans fit perfectly around a center can. Rubberband these all together and you have a great place to set those opened tubes of glue, thread lock, teflon oil, epoxy, etc. Also great for thicker tools like the friction screwdrivers and small butane torch shown. A ton of mini pliers will fit in them too.
Windex
Excellent for cleaning lenses but I use it for cleaning everything on the camera exterior.
Pliobond
For regluing leatherette mostly but works fine holding curtains and curtain straps to their shafts. When gluing curtains and straps clamp tight for best bond. The nice thing about Pliobond is that is doesn’t dry stiff.
Ronsonol
Good for dissolving old grease and flushing out dirty mechanisms. Caution: Ronsonol is very flammable…duh, it is lighter fluid. Coleman campstove fuel works fine also but stinks to high heaven.
Teflon Lube
Use sparringly on pivot shafts. Apply with the tip of your smallest slot screwdriver. Radio Shack carries a couple different types in handy tubes.
Moly grease
Thick molybdenum disulfide grease. Good for high surface stress areas or use as focus helix damping grease. Also very useful for holding aluminum/brass screws of old Kodaks to your screwdriver. Just apply a small ball of moly on the driver tip and stick on the screw. It’ll stay stuck there until you start the screw.
RemOil
This is gun oil. I use it as penetrating oil. It can be a mess to use but it frees shafts and pivots well. On older cameras I usually flush with Ronsonol after the parts free up then blow everything dry and apply Teflon lube to the pivots. On newer cameras made of harder steel parts I skip the Teflon lube and run dry.
Acetone
(in some types of fingernail polish remover) Use to unstick stuck screws.
Graphite
Get the finest grain size you can find. I use graphite as a manually applied plating. I massage it on contact surfaces until the color slightly darkens then blow out all stray graphite. Very good for aperture/shutter blades.
J/B Weld
Can repair most broken parts that don’t see high stress.
Kleenex
To clean lens elements. My favorite technique is to fold the Kleenex in small squares and hold with round tipped locking tweezers. Do not touch glass with tweezers nor apply pressure. Wipe in circles, do not scrub. And change the Kleenex if ANY dirt particles can be seen on it. These particles WILL scratch the glass!
Paper towels
Exterior cleaning and as a placemat for the camera to protect both camera and desk from scratches during assembly/disassembly.
Washcloth
I prefer an old washcloth in lieu of the paper towel as a placemat.
Paints
Micro-Tools sells several paints and coatings that sometimes even match the camera color!
Can of compressed air
An essential cleaning tool. An air compressor set at about 40 psi with a pencil tip is best and by far cheapest but my wife won’t let me bring the garage compressor in the house.
Dial vernier caliper
To measure things… What else can I say? Generally only needed when making/modifying parts.
Multimeter
Circuit testing. And if you have a digital, one check out the shutter speed tester you can make using it. A description can be found in test equipment section.
Dial Indicater
Like the dial vernier, not used very often.

Ciro-flex TLR Camera Repair/ restoration

The Ciro-flex is an American made TLR manufactured during the 1940s and ’50s. The Ciro camera company was purchased by Graflex and the Ciro-flex continued to be manufactured as the Graflex 22. Altogether, there were six different Ciro-flex models, A through F. The model A has a slightly different focusing mechanism, and is not quite as common. The B and C models have a non-synchronized shutter while the D, E, and F models have flash synchronization. The B and D models use the simple Alphax shutter while the C, E, and F models use the high-quality Rapax shutter. Early versions of these cameras have a parallax correction frame under the ground glass. In later models, the frame was replaced with a fresnel lens in order to help brighten the focussing screen. Overall, these are no-frills cameras with only a simple knob winder, no double exposure prevention or automatic film counter. However, they are sturdy cameras with good lenses and shutters. The model F has an excellent four-element lens that is quite sharp. All of these cameras are capable of taking very nice pictures and are still very usable for low-budget medium format photography.

Unfortunately, you will almost always find these cameras in terrible condition. The lenses, reflex mirror and ground glass are usually hazy and the shutter sticky or inoperative. In addition, the steel body will rust anywhere the paint has chipped off, and, often these cameras look like they are well beyond repair. However, as long as the lens isn’t damaged from fungus, a Ciro-flex can almost always be brought back to life. The rust on the body doesn’t really affect the performance of the camera; it just looks bad. These are easy cameras to work on and make an excellent first project if you are interested in learing how to repair a TLR. In addition, these cameras can be bought for very little money (often $20-30) and so if you are willing to put in a little work, you can have a nice medium-format camera for a very low price.

In this article, I show disassembly of the focus mechanism. Usually, this isn’t necessary. The focus cam can be cleaned using cotton swabs dampened with cigartte lighter fluid by reaching in from the back of the camera. On this camera, there was some dried out grease and I needed to soak the parts in solvent to get everything clean. As you can see, there isn’t much else to disassemble on the Ciro-flex.

A very good book on the Ciro-flex camera, and TLR usage in general, is PHOTOGRAPHY with the Ciro-flex by Bruce Downes. I have uploaded a 300dpi scan of the information in a Ciro-flex brochure.This describes the features of models B through F and shows the original prices.

To clean the focusing screen and/or reflex mirror, remove the four screws around the top cover and lift the cover off.

NOTE: on early versions of the Ciro-flex, with the parallax correction frame, you will not be able to lift the viewing hood off until the frame’s connecting lever is disconnected. In order to disconnect the lever, you need to remove the front panel, rotate the focus to the shortest distance and then remove the screw located on the right side of the lens standard.

The focusing screen and fresnel lens are held in place by two spring clips. Turn the hood over and remove the two clips. You will need to then slightly spread the frame to allow the screen and lens to fall out.

There are also four tabs on the frame that may be bent inward slightly to help hold everything in place. On cameras with the parallax frame, these tabs hold the frame together. Bend the tabs straight to allow the frame to separate.

With the hood off, you can reach the rear element of the viewing lens for cleaning. However, these lenses seem to get a coating of haze on the inner surfaces, and may need to be disassembled to get them clean. In addition, if you need to disassemble the focus, you will need to remove this lens in order to get the front panel off.

To remove the viewing lens, loosen the retaining ring at the base of the lens, then unscrew the lens assembly from the body. This ring is often tight. You can use a soft-jaw plier to remove it. It is easier to remove this lens after the shutter is removed from the camera. If you are going to remove the shutter, wait until the shutter has been removed before removing the viewing lens.

The outer lens elements are held in place by screw-in retaining rings that have no slots for a spanner. Use a rubber furniture leg cup to unscrew the rings. These rings may be stuck from oxidation. A small amount of solvent, such as alcohol or laquer thinner, will help loosen the rings.

To adjust the focus on the viewing lens, just loosen the retaining ring and rotate the lens until the image on the focusing screen matches the taking lens focus. Retighten the retaining ring when done.

The shutter is held in place by a retaining ring accessible through the back. On models without a flash connector, just unscrew the retaining ring and the shutter will lift out.

On models with flash, you need to disconnect the flash wiring before removing the shutter. Open the back and unsolder the flash connector you find there. There is another flash wire under the front panel that will need to be unsoldered as well. Remove the front panel to gain access to the second wire.

To remove the front panel, first peel off the leatherette from the front. The leatherette is made of paper and you should not use any liquid to try and loosen the glue. It is quite common for the leatherette to disintegrate when you try to remove it, so take that into consideration before deciding the remove the front panel. Remove the four screws and the front panel can then be lifted off. On the model F, you may need to loosen the shutter retaining ring slightly in order to work the panel around the shutter.

On flash models, you can now reach the body connecting wire to unsolder it.

To remove the focus for cleaning, first remove the front cover, shutter and viewing lens. Unscrew the hex nut and the lens mounting plate will lift off.
The next panel rarely needs to be removed. You can remove it for cleaning if needed, or if you want to remove all the old leatherette. Remove the four screws and the plate will lift off. There is a felt washer underneath the panel that goes around the hole that the guide post for the lens plate moves in.
The focus bracket is held to the body with four screws located underneath the leatherette. You need to cut into the leatherette to expose the screws and then remove them. It usually isn’t necessary to remove this bracket since it can be cleaned once the forcus shaft is pulled out from the back. (See next picture.) However, if you need to remove the focus cam, this bracket has to come out first.

In the previous picture, note the four holes for the screws that hold the focus bracket. These screws can be removed without removing this panel.

Remove the screw in the end of the focus shaft and lift the guide and shaft out.

 

Note that the guide that sits against the focus cam is not exactly perpendicular to the camera body. It must be positioned so that the guide does not bind against the cam when the cam is rotated to the short focus position. This is usually when the guide is at an angle of about five degrees to the camera body. To reinstall the focus shaft, insert the shaft and guide but don’t tighten the hex nut on the front panel. Rotate the focus to the short position and allow the guide to rotate to where it doesn’t bind. Hold the guide in place while tightening the hex nut on the front.

 

 

To remove the focus cam, loosen the screw in the center of the focus knob and lift the knob off. The cam can be removed from the inside of the camera.

The focus cam needs considerable lubrication on both the inside and outside surfaces.

To adjust the focus, set the focus so that the image at the film plane is sharp at infinity, then loosen the screw in the middle of the knob and turn the knob against the infinity stop.

This picture shows the parts of the focus shaft and guide. There is a spring tensioner in the guide that puts pressure on the guide to prevent slap-back of the focus.

Lightly lubricate the shaft where it goes through the mounting bracket

To remove the wind knob, push out the tapered pin in the spool shaft and then pull the collar off, then reach in and pull the coiled spring out.. The knob and shaft come out together. There is a spring inside the knob that prevents the winder from being turned backwards. One end of this spring is bent so that it fits into the slot in the tube the winder goes through.

You will need to put a liberal coating of grease on the inside of the knob. This will give the knob a nice smooth feel and will also stop the winder from squeaking.

Notes

If you need to remove the back, push out the steel rod in the hinge and the back will separate.

The two film guide rollers may have rust on them and need to be removed for cleaning. Slightly bend the bracket that holds the ends of rollers and then pop the rollers out.

 

Source: http://pheugo.com/cameras/index.php?page=ciroflex