Pages

Showing posts with label clean. Show all posts
Showing posts with label clean. Show all posts

Saturday, 23 March 2013

An Agfa Isolette has laneded


Recently a package arrive from a friend that was giving away a number of Agfa  Isolette cameras. I put my name down for one, not quite expecting to have my name pulled out of the hat. As it turned out not that many people were interested. The cameras were advertised as not tried and tested so you could end up with one that may not be in proper working order. However they are easy to repair if there is a problem.

 As it turns out, the one I have does not have any faults that I can find apart from needing a major clean. It has the dustiest insides I have seen in a long time with the bellows being full of fluff.  I have carefully cleaned it out using compressed air and a damp cotton bud. Having first earthed myself to reduce the static in my body. The lens was slightly dirty which has been gently cleansed with lens fluid on a cotton bud.

 
The Agfa Isolette was introduced in the 1950. It produces a 6x6 negative making it a member of the 120 medium format family. The camera pictured is an Isolette 2 With the press of a button the front flips open to reveal an 85 mm Apotar 1.4,5 lens that shuts down to F22 and has a shutter speed range from B to 200 hundredths of a second.  For a completely manual camera it is well designed and sophisticated, even by today’s standards. It has a number of features that shows its quality, firstly with a film holder that flips out of the camera back to allow the easy installation of a new roll. A shutter lock on the winding mechanism that can only be removed by advancing the film, helping to prevent double exposures. Although the lens has a focus ring it is not a range finder and therefore distances have to be guestimated. A range finder device was produced as an extra that clipped into the shoe on the top. It's compact size makes it just right to slip into the pocket of a gentleman's jacket, although the all metal construction makes it a little bit heavy for comfort.


With all the cleaning and checking done, all that remains is some good weather so the camera can be put through its paces.

Monday, 19 December 2011

Dust in the darkroom.


If you look at a beam of light whether projected from your enlarger's negative carrier or a shaft of light shinning across a room you will notice lots of particals floating in the air. Dust over the course of time will settle on the upper surface's of your enlarger and lens.

It does not take long for a considerable amount of dust to build up on the surface of your lens greatly reducing the brilliance of light passing through it. You should make it a rule that once or twice a year you clean the lens thoughly. It is also a good idea to cover the enlarger at the end of each session with its cover if it has one or a black plastic bag this will greatly reduce the dust build up.

If you have a window in your darkroom that needs to be blacked out it is not a good idea to use curtains as these are dust traps. You are better off using a wooden shutter made of hard board painted matt black or a roller blind made of light tight material that has some way of being sealed along the sides.

What you have on the floor is also important. If it is carpet it needs to be removed, as this is a dust trap too. It should be an easy clean material like lino if you have floor boards or garage floor paint for concrete floors these keep the dust at bay making it easy to mop the floor with water, it also means that you do not have to vacuum very often leaving more time to print.

Wednesday, 14 December 2011

Washing your negatives


This is just as important as the developing, stop bath and fixer. The temperature of the water needs to be close to that of the previous process of 20 degree C.

The purpose of washing is to remove the last of the fixer from the emulsion and needs to be done thoroughly to ensure the longevity of the negatives.

Which method to use? One way is to empty the tank and refill with fresh water and agitate for a few seconds, this should be repeated several times. Another way is to use a wash hose that is specially made to fit into the top of the developing tank and attached to the tap. I personally favor this approach with my own refinements: after fitting the hose in place I open the tap till it is nearly fully open and leave for thirty seconds, this vigorusly removes the last of the fix that remains. Then slow the flow right down for the next ten to fifteen minutes. It is a simple straight forward procedure that has served me well over the years.