Apart from sharpness and contrast, I also desire some imperfections rendered by the lens such as swirl etc.,
I maybe a little harsh when it comes to uncoated Dialytes, and low contrast, the best are definitely very sharp. A good lens hood will help, better still a Compendium style adjustable bellows lens hood will be the most effective.
Personally for portraits I'd go for a Cooke triplet design (or Tessar), I had superb results when using a Rolleicord and Triotar, these days I have 150mm & 210mm Geronars, both Cooke triplet type lenses. I also have some TT&H Cooke triplets on reflex cameras, that I can also use on my two Speed Graphics. Failing that I'd use a Tessar or type lens.
What am I really saying, given a choice I would not use my 203mm f7.7 Ektars for portraits (coated Dialytes) they are very sharp lenses, my next altenative is my 210mm f5.6 Symmar S, but no I'd go for a Congo/Osaka 210mm f6.3 this is the Japanese version of the Commercial Ektar, which Kodak soldtoCongo.
Finally, the simplest design is the Cooke Triplet Geronar. These are all budget lenses.
Ian
Apart from sharpness and contrast, I also desire some imperfections rendered by the lens such as swirl etc.,
That should be Trinar.The Rodenstock Trunar is a good triplet lens.
Try to flush clean the piston with alcohol - after cleaning and drying it should work; do not use oilI think I will settle with the existing plate camera and CLA the shutter (I tried, still the piston is stuck even after taking out the speed setting dial and a small pin there).
I also got a Rolleicord with a clean Triotar and working compur shutter. May be this camera is already capable of rendering the imperfections better than I can imagine.
Try to flush clean the piston with alcohol - after cleaning and drying it should work; do not use oil
It's best to be careful if the aperture blades are made of plastic or paper.
I always thought they were made from metal alloy.
Some early Gauthier shutters used some kind of plastic blades. Most "dial-set" Compur shutters have a black paper iris. Some later ones have metal irises like the "rim-set" Compur and later. It's easy to tell them apart. The paper blades look evenly black and slightly grainy, like this: https://content.invisioncic.com/l32...7584.jpg.12182efde28d4674928dd0b8295d0d8c.jpg
Solvents can easily damage the plastic, and for the paper blades even water can destroy them, making them swell up and change chape.
Regular toothpaste with a couple drops of water and a kimwipe or pec pad can polish off haze or fungus quite well without leaving 'cleaning marks', even on coated lenses. It also works to put toothpaste and couple drops of water on a flat bathroom counter and polish flat lens surfaces. I've used it with much success on lenses that wouldn't be any worse off having been cleaned this way.Many dialytes can be screwed apart so you can clean all glass surfaces. I could do that with the 4,5/135 and 3,5/150 Eurynar, but not with the 5,4/135 version. I have one 5,4 Eurynar with haze inside that can't be cleaned.Just be sure that the lenses face the right way. I took pictures when I cleaned the Eurynars. Here is one of them I still have saved:
Some early Gauthier shutters used some kind of plastic blades. Most "dial-set" Compur shutters have a black paper iris. Some later ones have metal irises like the "rim-set" Compur and later. It's easy to tell them apart. The paper blades look evenly black and slightly grainy, like this: https://content.invisioncic.com/l32...7584.jpg.12182efde28d4674928dd0b8295d0d8c.jpg
Solvents can easily damage the plastic, and for the paper blades even water can destroy them, making them swell up and change chape.
It's best to be careful if the aperture blades are made of plastic or paper.
Why would you need a compur if you already have a compound?manage to find the details of this compound shutter. Seems it is not the standard one and may be its difficult to find a compur of this size.
The germans called it 'hartgummi' which translates to hard-rubber.It's best to be careful if the aperture blades are made of plastic or paper.
The germans called it 'hartgummi' which translates to hard-rubber.
Today just managed to finish my first roll of VPS160 in newly acquired (somewhat beat-up) roll-holder for my old and trusted Zeiss Ideal 9x12 cm - bought just around 50 years ago. However the Dogmar 4,5/150 was not originally provided with the Ideal, that came with a Tessar 4,5/150 (since used for something else, forget what). The VPS to be commercially developed one of these days.
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