Ran across this article by accident on the history of shutter design ... interesting: Link
Ran across this article by accident on the history of shutter design ... interesting: Link
Excellent!
great article. I actually learned how to use my Guerry shutter.. (maybe...)
Emil, this is not a good source for real information about the Guerry - but the others listed are better covered. I found a much better, similar layout, summary in "earlyphotography" website under shutters - with the various types listed.
Your Guerry won't work properly until your change the solidified red internal bulb with a flexible replacement!
no - that's not the problem.
The shutter works really well.
The problem is, when putting it on a front of a lens, the leaf, when opening fast, it shakes the lens a lot...
Looking at the image in the article, I thought it might not shake so much when used....
But what do I know....
I looks like it is supposed to be put onthe front of the lens, but then.....
just looked at the earlyphotography site, and my shutter doesn't look like the pictured one...
(It is the "late" model with electrical contacts...)
I'll see if I can take a picture of my shutter, as it is difficult to explain in writing...
The first link (OP) in this series shows the Guerry mounted on the back end of a Petzval in a drawing! Although all say it can be rear mounted (if there is room!), I think they mean like a Packard/Ilexpo. On my 7" opening Guerry, there are many screw holes on the wood edges were it has been attached to the inside of a Front standard or a 10" lens board.
The big disadvantage of the Guerry is that the front mounting system means that there is a very small range of barrel diameters the individual size shutters fit.
Another early shutter that was very popular in America was made by Prosch.
http://www.photica.net/shutters/shutters.htm
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As usual, the devil is in the details. The author (Rand Collins) of this article says that Bausch & Lomb started the production of their iris diaphragm shutter in the year 1890. From what I know Edward Bausch invented this shutter in the year 1887. It was patented the following year (1888 - pat. n. 382858) and started to be manufactured in the same year - 1888.
I was using a Darlot Hemispherique Rapide in a Prosch shutter over at Garrett's last weekend. One of the more interesting aspects of the Prosch shutter is that it has four different tension settings, giving the user a choice of 1/40th of a second, 1/40th of a second, 1/40th of a second, or 1/40th of a second.
"I love my Verito lens, but I always have to sharpen everything in Photoshop..."
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