Attachment 231476
Imagon 250mm, something in the middle oft the H 7.7 disk while the upper small holes are masked, Wisner 4x5
This is my first Imagon picture.
Thanks for the informations I picked up here about SF.
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Attachment 231476
Imagon 250mm, something in the middle oft the H 7.7 disk while the upper small holes are masked, Wisner 4x5
This is my first Imagon picture.
Thanks for the informations I picked up here about SF.
. . John E. 285mm Wollaston on 4x5.
https://live.staticflickr.com/65535/...cf187a8_6k.jpg. . John E. by Reinhold S., on Flickr
Reinhold
The lens here...
https://www.photrio.com/forum/thread...t-lens.194234/
Imagon 250mm
https://live.staticflickr.com/65535/...78710156_b.jpgDSCF19489_ copy by Vladimir Borisov, on Flickr
https://live.staticflickr.com/65535/...0155bf59_b.jpgDSCF19487_ copy by Vladimir Borisov, on Flickr
https://live.staticflickr.com/65535/...d6c50f2a_b.jpgDSCF19423_ copy by Vladimir Borisov, on Flickr
Attachment 242945
Interpid 4x5, Rodenstock Imagon 180 (7.7-9.5), fuji across 100, pyro, fly
Very glad to see more Imagon!
I appreciate the last 2 posters
Thank you
Thank you.
This is one from my favorite lens.
Another next 250mm imagon shots with nature:
https://live.staticflickr.com/65535/...a5d85d6c_b.jpgDSCF19415_ copy by Vladimir Borisov, on Flickr
https://live.staticflickr.com/65535/...43b88da7_b.jpgDSCF19431_ copy by Vladimir Borisov, on Flickr
https://live.staticflickr.com/65535/...1dd7eb2c_b.jpgDSCF19479_ copy by Vladimir Borisov, on Flickr
https://live.staticflickr.com/65535/...583f55f4_b.jpgDSCF19495_ copy by Vladimir Borisov, on Flickr
Recently, I made a lens for a customer in Amsterdam, here's what he sent me...
Attachment 244934
125mm f/2.3 Wollaston Meniscus lens
4x5 Intrepid camera, f:11, Ilford FP4, (no exposure time or filter data was recorded
The ground glass was focused just to the right of the bridge pylon.
Spherical aberration, typical of the uncorrected meniscus lens is evident in the right half of the photo.
By emphasizing the central part of a photo, the Wollaston Meniscus is a useful tool for the portrait Photographer
Reinhold
At 88, I’m still in production...
https://www.re-inventedphotoequip.com/Home.html
Looks good!
Quote:
Originally Posted by Reinhold Schable
I used a DIY made miniscus lens, 270mm and used f/8
Michael Neumuller explained in his book " Praxis der Weichzeichnung" one of the best books about soft focus lenses, why round apertures are not the best choice for menicus lenses.
The star form style is much better and f/8 is the perfect f-stop for this lenses.
Ok, I tested it, I made a waterhouse stop with the aperture value f/8 in the recommended style.
The other point is to avoit the focus shift, Neumüller wrote a yellow or yellow/green filter makes the correction of the focus shift obsolet, when a colour sensitive film is in use.
I used a yellow/green filter -1EV and the Fuji UM-MA xray film, orthochromatic, in Kodak HC 110, 1+39
It works perfect, the focus is exactly were I set it on the ground glass. No focus shift because the blue and violet light were complete cutted out.
The meniscus lens is out of a Zeiss lithography lens, it is apherical and has a diameter of 120mm (4 7/8") Made of quarz glass, fused silica.
I illuminated the setup with three LED lamps.
https://live.staticflickr.com/65535/...5fafd2d2_h.jpg
Neat, Arri. I'd never heard that about the aperture shape. Did the filter lead to less of a soft focus effect?