Heliar Lens

[Jan Pedersen]

Note that except for the very first few years, "Heliars" are really Dynars. The main difference is the order of negative and positive in the cemented outer cells.

And yet there are exceptions to that to. I have 210 3.5 Heliar in a compound shutter. The serial number dates it to the mid 30's and it is a true Heliar whereas the 4.5 from the same time i believe is a Dynar.

[Ole Tjugen]

Somehow I'm not surprised at all.

The last time I was surprised by Heliar design and differences, was whan I put a 150mm Heliar (1934) on a 5x7" camera. It came close enough to covering that I wouldn't hesitate to use it, unless I needed perfect sharpness all the way out into the last few mm in the corners!

which led me to the discovery that dynars have more coverage than heliars, and most Heliars are dynars, and so on...