It's an excellent photo regardless of what lens was used. Given what was used, it's amazingly good!Originally Posted by Gigibertcha
It's an excellent photo regardless of what lens was used. Given what was used, it's amazingly good!
“You often feel tired, not because you've done too much, but because you've done too little of what sparks a light in you.”
― Alexander Den Heijer, Nothing You Don't Already Know
Nice print, Randy!
“You often feel tired, not because you've done too much, but because you've done too little of what sparks a light in you.”
― Alexander Den Heijer, Nothing You Don't Already Know
I post it as example of 5X7 SF enlarging which many say is not a good idea
Every time I open that storage drawer
I am smitten again
Thanks guys
Tin Can
Unmarked brass lens, wide open, approximately 180mm f/11.
I tested an aspherical fused silica single lens element with 250mm focus length and a diameter of 115mm.
The lens were a part of a Zeiss lithographic lens for deep blue light, that´s the reason why it were made of quartz glass.
I mounted the lens into a barrel and gave it a fixed pre aperture with f/3.1 and made a few waterhouse stops for it.
Single lens elements are not colour corrected which means that I have to reduce the found sharpness of the groundglass by a formular like this:
(extension²)/50xf = (350mm²)/50x250mm = 122500/12500 = 9.8mm
When I use this correction I get a very good focus to a point I prefer, otherwise it is impossible to use this lenses.
You can use this formular as well when a lens has two lens elements made of identic glass, like a Rodenstock Bistigmat or single lens element sets, some of it are named "Meteor" or the Busch Vademecum.
In the same way you can build your own lens with two single close up lenses, no other way to get a cheaper soft focus lens.
I used 4x5" sheet Fomapan 100 @ISO80, Wehner Developer, Sinar F1 with rear lens shutter.
Wow, well done.
Creating soft-focus lenses from supplementary (AKA auxiliary or close-up) lenses (AKA filters)
http://www.subclub.org/fujinon/softfocus.htm
Can't get the link to open
Try another browser. Apparently CHROME, etc. have more "filters", than say FIREFOX.
It's there.
I see it with Google
I am saving that file
Thank you!
Posting Permissions
Reply With Quote
Bookmarks