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They used slip-on filters back then, and the thread is usually for the front element retaining ring and not meant for accessories. But sometimes you might be lucky and can use the thread.

Ah, yes, I forgot about the "wide open trend" with shallow depth of field and, sometimes, interesting aberrations. I'm so used to stopping down at least a little even if I want a shallow depth of...

Aren't the Xenotar and Planar for large format somewhat overrated? People think Rolleiflex and Hasselblad and hope for the performance many times doubled on large format, so these lenses sell for...

Even though the Compur shutters of this age had size numbers the retaining rings were not always of standard size. The shutters were sometimes made to fit certain lenses and cameras.

Surely...

True, nor on B.

Many of them have coated paper aperture leaves, so be careful if you try to clean the shutter.

If it says so. The smaller Compurs 1/250. They are probably a little slower than that by now, but you can still treat them as they are correct.



Yes, B = Bulb, T = Time. M = Moment. (D = Dauer,...

42mm is also a common size for slip-on filters and shades, which is good and should be easy to find. :)

What's the outer diameter of the lens in millimeter? It would be interesting to know what size slip-on filters/sun shade fits.

Congratulations! The Dogmar is a fine classic lens for black and white, just use a sun shade. I have the 135/6,3 version from 1916 and it's a gem.

Yes, there are front cell focusing Heliars. The Heliar is a modified triplet after all. You can also find it on the Voigtländer Brillant.

Cameras with front cell focusing lenses were cheaper to...

Utmärkt test! While most people would agree that the blurry corners make the single lens cells not suitable for landscape, I feel that the optical faults contribute to the image in a positive way,...

Google Rietzschel Telinear, it's a lens of the same type.

The Steinheil Cassar is a typical triplet. It is common on folding cameras, both medium and small format.

The Homocentric is a Double-Gauss lens with the front and rear components being symmetrical, hence the name. Similar later designs like the ICA Hekla and Meyer Aristostigmat were tweaked a bit and...

How would you avoid vibrations when you can't attatch a cable release or tube and bulb?

Good choice, be happy with the Repro-Claron. I have never used one, but it should be sharp and neutral, good for most things. The Heliar is also a nice allround lens, especially if you want "3D-pop"...

I think sites like that are very much needed. There are lots of people like me who are interested in lenses and want to learn more, like what the purpose is of this or that lens element in classic...

And it's not always as easy as measuring the diameter of the front element to calculate the aperture. For example, the Ross Xpres 3,8/105 has a larger front element diameter than the Zeiss Tessar...

Yes, it was made in 1924, and as you can see on the Compur shutter, it came from an ICA camera. The dial-set Compur shutter was used till around 1928, and from then on the rim-set Compur.

Autofocus, maybe, and when they write: Autocorrection. They must have bad monitors as well, when they can't see the details like fungus in a lens in the higly enlarged digital photos on the screen.

I want to visit that shop and ask about sandblasting.

I agree with most of this. And older lens made to be sharp, so not a soft focus lens. I would personally not use shorter focal lengths than meant for the format. Yes, that would introduce...

I would just use the #15 deep yellow filter. It blocks all UV, cuts through the haze enough to sharpen up the details in the distance and darkens the sky without giving that unnatural look you can...

I couldn't find information on the "Three Focus" lens, but it does indeed sound like a triple focus/convertible one, meaning that you can use the complete lens, the front or the back group. If it...

It should have three cemented lens elements in both groups. Is the fungus inside one of those groups, in the balsam between two cemented elements? Yes, upload photos. This is interesting.

5,4 is...

Yes, and yes. But it doesn't have a separate scale for using the rear lens group.

I have a Steinheil Orthostigmat in Compur from the 1920's and it's a 6,8 lens.

Yes, those are metal blades. Excellent. Most of my Compurs of that style have the paper blades. The risk with a dislodged aperture blade is that it can move about and cause more blades to dislodge....

It should be an easy fix for a repariman. It's a good idea to tell that person that this version of Compur has the delicate paper aperture blades so he doesn't try to dip the whole shutter in a...

Yes, it's a problem. The pivot pin of one of the aperture blades had become dislodged from its hole. The aperture blades in this shutter are made of treated paper and are easily damaged.

That place is considered evil by some, comparable to a certain software company or the name of a scottish play one should never say in a theatre.



And that too!

You can find achromats in different focal lengths on a certain auction site.

It certainly does. It was the shape of the ejecta from the craters that looked like the web like pattern that fungus produces. When I scrolled down further it became clear that it wasn't fungus, but...

Pere Casals, when I scrolled down and saw the first inch of the Moon photo I thought "Man, that's a bad case of fungus".

I got a reply from Schneider: "Lexar" was a brand name owned by Nagel, and in the Schneider records it's only called "Nagel-Anastigmat" and is a lens very similar to their own Xenar. That cleared it...

Thanks for the tip! Not perfect, but it does make it easier to find posts that you know are "hidden" somewhere in the threads. :)

I often start with Google for the search to begin with, by typing in the name of the lens and do an image search. I can, for example, type in "Eurynar" and in the search results I might see a...

I find it extremely annoying when I search for, for example, the name of a certain lens, and the result I get is a list of topics. Some of the topics have tens and sometimes hundreds of pages, so to...

No, it says "Lexar" clearly on the lens. Here's the auction for the camera: https://www.ebay.de/itm/382448849067

The name Isconar/Jsconar was used long before that. Joseph Schneider & Co -nar.