Only in special cases, otherwise even specs and dust particles in lenses would be visible - and I never ever saw that, even with an f-stop of 45 or higher...
Only in special cases, otherwise even specs and dust particles in lenses would be visible - and I never ever saw that, even with an f-stop of 45 or higher...
http://www.liquidcrystaltechnologies...iderations.htm this kinda rules it out doesnt it?
To see a world in a grain of sand
And a heaven in a wild flower,
Hold infinity in the palm of your hand
And eternity in an hour.
- William Blake
ex-Pic-A-Day (slowed after 2 years)
on flickr
Analogue Photo and Film FAQ (for APUG)
Open Source F/Stop Timer
I couldn't agree more.
The best solution for big, fast, giant lenses currently is the Sinar/Copal shutter.
Unfortunately it's limited to slow speed (which sort of defeats the scope of acquiring expensive soft focus or fast portrait lenses, if you must use them stopped down!), and it's also a vibration machine
Many professionals happily used the Sinar shutter for years, but the main use was in studio, with FLASH!
That way the vibrations are of no concern... and the Sinar gives its best.
Whatever it is your opinion about Sinar/Copal vibrations, the lack of fast speeds makes it a poor match for fast lenses, which must be used wide open to get the image quality they're famous for.
An LCD substitute, with max speed of 1/500sec, would be almost perfect. 10cm internal diameter is already very good, and sufficient for the most part of those lenses, but i agree that a 14cm shutter would wide enough for the vast majority of those brass chimneys i find so attractive (and which i would not be able to afford in the foreseeable future )
400 USD isn't exactly cheap for a shutter (you can get a working Sinar for much less), though i don't think that's so much, if we consider the kind of lenses which would be matched to such a shutter, and their PRICE.
We all know that there are people who would happily pay 4/5000 USD for a nice Perscheid, so i think that $400 for a shutter that allows them to shoot wide open would be considered perfectly acceptable, if not outright cheap!
BTW, if a very small series would be 400, and IF the first batch works well, i am sure that there would be more interest than what we could expect as of today.
Not a large scale, industrial item, but probably a few hundred pieces. Such number would make the shutter somewhat cheaper to produce, and a better price would increase the number of interested parties.
Just speculating... unfortunately i am not so sure that a LCD shutter (good for the intended application, and with no major optical flaws) would be feasible at a do-it-yourself level.
have fun
CJ
have fun
CJ
WTB (and pay good monet for):
soft back cell for Ilex Photoplastic 5x7
disks for Imagon 420mm
5x7 back for Calumet C1
5x7 conversion for Bi-System
for sale
Photographica
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