Minolta 85 mm f/1.7 fungus revival

Coffee Shop

Coffee Shop

  • 0
  • 0
  • 39
Lots of Rope

H
Lots of Rope

  • 0
  • 0
  • 134
Where Bach played

D
Where Bach played

  • 4
  • 2
  • 471
Love Shack

Love Shack

  • 3
  • 2
  • 972
Matthew

A
Matthew

  • 5
  • 3
  • 2K

Forum statistics

Threads
199,808
Messages
2,796,855
Members
100,041
Latest member
assa2002
Recent bookmarks
1

Dhr Foto

Member
Joined
Jan 2, 2025
Messages
17
Location
The Netherlands
Format
Multi Format
I may or may not have bought a very cheap 85 mm f/1.7 with fungus on the front element. This is the guide on the mflenses forum I will be following. I wanted to start this thread early, because I wanted to post the "before" images I made to make a more objective comparison.

Images taken with a Fujifilm X-E2 APS-C 24MP camera - I have no FF digital on hand to make test images with so this will just be evaluating center performance.

Below: 1.3 m, color target

DSCF9312 f1.7 (Large).JPG

DSCF9314 f4 (Large).JPG

DSCF9316 f16 (Large).JPG



Below: 1.3 m, 0.5 mm point source, focus at infinity
DSCF9326 f1.7 (Large).JPG

DSCF9327 f4 (Large).JPG

DSCF9328 f16 (Large).JPG


Original images are 4000x6000, but compressed so I can post them. I have no reliable way to test out-of-focus performance yet but I have some test images I could use. As they contain location info, I'll not be sharing them. Does anyone have some good ideas to create good reference images for a before and after cleaning dataset? I was mainly following the minolta.su - style images.
 
Joined
Jan 31, 2020
Messages
1,324
Location
Germany
Format
Multi Format
The main difference I expect is not in colour rendition or sharpness but in flare sensitivity. So a before and after comparison in controlled but challenging lighting would be interesting. Maybe photographing the colour chart under a lamp that is included in the picture.
 
Photrio.com contains affiliate links to products. We may receive a commission for purchases made through these links.
To read our full affiliate disclosure statement please click Here.

PHOTRIO PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Ilford ADOX Freestyle Photographic Stearman Press Weldon Color Lab Blue Moon Camera & Machine
Top Bottom