Exa IIa

Exa IIA front view

lens: Meyer Domiplan

focal length:  50mm

apertures: 2.8 to 22 in 1/2 stops

focus range: 0.75m to infinity

lens fitting: Exakta bayonet

shutter: vertical cloth focal plane

speeds: 2, 4, 8, 30, 60, 125, 250

flash: bulb or electronic

film size: 35 mm

Externally, this is very like the Exa Ia and exactly like the Exa 500; it has the usual Exakta trapezoidal shape.  The layout on the front fascia is the same - shutter release on the left at the top, PC connector on the right at the top.  The lens fitting is the standard Exakta double bayonet (an internal bayonet for short focal length lenses and a larger external bayonet for longer focal length lenses).

A PDF manual is available on my Google Drive

There are differences, however.  The IIa has a fixed pentaprism and eye-level viewfinder with a Fresnal focussing screen with a split-image centre.  The shutter is now a vertically running cloth focal plane shutter rather than the strange mirror shutter of the Ia.  Along with the more standard shutter comes a larger range of shutter speeds  - eight speeds with the fastest  now being 1/250 seconds.

The removable back/base is exactly the same as is the shutter lock on the left of the viewfinder.   Another change is that the rewind knob is now a fold-out crank.

Exa IIa, rear view

With a vertical focal plane shutter, it should have been possible to increase the flash synchronisation  speeds but they are rather slow - 1/15 for bulbs or 1/30 for electronic flash.  The fact that bulb flash needs a slowest synch speed suggests that the only synch available is as the first shutter curtain ends its travel, bulb synch relying on the shutter being still fully open when the flash bulb reaches full intensity.

The Exa IIa came with a Meyer Domiplan lens rather than the Carl Zeiss Tessar that was standard with the Exa Ia.  I have yet to see the results from this lens but it has the reputation of delivering good results when stopped down.

This lens, like the Tessar, automatically stops down the aperture when the shutter release is pressed.  Exa lenses manage this by means of a lug on the lens barrel that covers the shutter release on the camera body.  The shutter is activated by pressing this lug which in turn presses the shutter release.

On the Domiplan lens, this lug is hinged and so presses the shutter release through an arc.  Because the release is not pressed straight in it can cause internal damage to the release mechanism.  This is made worse if the lug does not exactly line up with the shutter release so that it presses on one side of the release button.

shutter release lugs - Domiplan on left, Tessar on right

There is a further fault with the Domiplan.  As mentioned above, the release lug is hinged and this hinge dries out with time.  When the lubricant has dried out, the lug will not always return to its rest position after a photograph is taken.  This means that the aperture does not re-open to f2.8, leaving the viewfinder dark.  In use, this is easily remedied by flicking the lug with the shooting finger but it is annoying, nonetheless.  I have applied clock oil to this hinge and it is showing signs of freeing itself up.

4 February 2013:

Having run a test film through this camera, it is difficult to assess the camera's performance.  All the pictures ended up bright green.  This could not have  been down to the camera - it is an SLR and I would have seen the green through the viewfinder.

There are three possible causes for this green - defective development, defective film or defective scanning.  The staff in the lab assure me that mine is the only film to have come out green and so they do not think it was their development.

Defective scanning is a possibility but I would think it to be an automated process and if they have not changed any settings then the scanning process should not produce any colour cast.

The third possibility is a defective film.  The film I used was Agfaphoto Vista + 200 ISO, made under contract in Japan by, I think, Fuji-film.  Reputable makes of film should be reliable but in any factory process it is possible for the occasional item to escape the quality assurance system.

I am thinking that the reason for the green cast in my test film is the middle one - a defective scan - looking at the negatives, there is evidence of all three colours on the perforated rebate of the film (these are the frame numbers in magenta (the negative of green) and test lines in red and green (the negatives of cyan and yellow)) so it looks like at least part of the film has the requisite colour layers in the emulsion and the development has developed these correctly.  When I have time, I will scan the film myself to check the scan quality.

In addition to the green colour there are other problems which are definitely down to the camera.  At the bottom of each picture is a very over-exposed strip - this equates to the top of the film in the camera.  As the shutter travels vertically from bottom to top, this is most likely caused by the second shutter curtain hesitating slightly at the end of its travel.  This might cure itself with use which is quite common with 'stiff' mechanisms in old cameras.  I also need to be aware that I used this camera in sub-zero temperatures.  The lubricant in the shutter will be thicker at these temperatures and the shutter might well work better in warmer weather.

In general, looking at the negatives, the film has been exposed appropriately with good, but not excessive image density.

Some of the negatives are blank but this is down to operator error.  The shutter release is in the 'wrong' place.  Years of practise have taught me to be careful with the placing of my right hand when holding the camera.  With Exas I need to be careful with the placing of my left hand instead.  I also need to learn to use the shutter lock when not actually shooting.

This is my second Exa camera and my third roll of film on Exas.  That is enough to know that I like using Exa cameras with their various idiosyncrasies.  See further down for well exposed pictures from my second roll of film.

Witham by market Square

Lindum Terrace, Lincoln

Steep Hill, Lincoln

 I now have a test film with correct colours.  Nothing to complain about there,

CMF Comet S

CMF Comet S

This is a cheap Italian camera which uses 127 film.  The makers is Bencini which is an Italian firm.  At the time this particular camera was made, the firm was called CMF Bencini.  They were made in Milan.

lens:

apertures:

focus range: 3 feet - infinity

lens fitting: fixed

shutter: simple

speeds: 1/50

flash: PC connector, M synch

film size: 127

The camera is small and light.  it is made from an aluminium alloy which is nicely polished.  It is small, measuring 10.5 x 7 x  6.5 cm.  It is a very simple camera with only two controls.  You can focus the camera - the range is from 3 feet (circa one metre) to infinity - and you can set the shutter to 1/50 seconds or B.

It is a half frame camera using 127 film.  The negative size is 3 x 4 cm which is approximately twice the size of 35mm.  You get 16 negatives on a roll of 127 film.

Lens barrel detail

The speed selector is unusual in that it is a tab that is pulled out from the lens barrel; see photograph.  The speed selector is on the right of the picture - also visible is the PC connector for flash.  This is synchronised for bulbs only so not too much now.

The viewfinder is very small - the eye piece only measures three millimetres across.  It is the smallest viewfinder I have ever seen.  However, it is still usable once I take my spectacles off.

Comet S - rear view

As a roll film camera, it is necessary to look at the red window on the back when winding on to set the next number in the red window.  As this is a half-frame camera, each number is used twice - there are two red windows - first in the left hand window and then in the right hand one.  the picture shows the two red windows, one either side of the maker's name.

Again as is always the case with roll film  (120 and 127 size) you do not need to rewind the film.  At the end of the roll, you wind the film on until all the backing paper is on the take-up spool and remove the film and spool together and stick the end of the film down with the sticky tab provided.  The spool the film came on is then used as the new take-up spool.

127 film spool

As 127 film is now quite expensive and not too easy to get hold off, I doubt I will ever use this camera.  So, no test pictures from this camera, I'm afraid, but samples can be seen here.