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FJW Industries 90mm f1.0 on Sony A7R4
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PostPosted: Tue May 24, 2022 7:09 am    Post subject: FJW Industries 90mm f1.0 on Sony A7R4 Reply with quote
This lens is an industrial X-ray lens that came in several configurations, one of which can be mounted on a mirrorless and achieve infinity focus. Unlike many similar lenses of such speed, this lens covers FF and even larger. This lens was also manufactured with the name "Varo Optical". It has unusually good spherical aberration correction for such a lens, without the usual "misty" look that X-ray lenses often produce. These images are corrected for contrast and microcontrast, sharpened, and corrected for falloff, but without heavy processing.
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PostPosted: Wed May 25, 2022 12:14 am    Post subject: Reply with quote
Beautiful photos, how did you adapt the lens?


PostPosted: Wed May 25, 2022 1:55 am    Post subject: Reply with quote
There are three versions of this lens that I know of. One has a rear barrel small enough to fit inside a M58 helicoid. With a few wraps of pvc electrician's tape it fits inside firmly.


PostPosted: Wed May 25, 2022 6:27 am    Post subject: Reply with quote
Very nice results Toby! Happy to know that I have this lens, too!


PostPosted: Thu Jun 02, 2022 5:00 pm    Post subject: Re: FJW Industries 90mm f1.0 on Sony A7R4 Reply with quote
kymarto wrote:
This lens is an industrial X-ray lens that came in several configurations, one of which can be mounted on a mirrorless and achieve infinity focus. Unlike many similar lenses of such speed, this lens covers FF and even larger. This lens was also manufactured with the name "Varo Optical". It has unusually good spherical aberration correction for such a lens, without the usual "misty" look that X-ray lenses often produce. These images are corrected for contrast and microcontrast, sharpened, and corrected for falloff, but without heavy processing.


Very beautiful and interesting results - the B&W portrait is particularly impressive. Outstanding work!

Don't know much about FJW Industries but as far as I know they also produced a 54 mm f/1.2 lens very similar to the JML 56 mm f/1.2 or Nikkor-O 55 mm f/1.2. Does this one have a variable aperture or a fixed one?


PostPosted: Sat Jun 04, 2022 7:30 am    Post subject: Reply with quote
Like 1 Like 1 Like 1 Very nice Toby!


PostPosted: Sat Jun 04, 2022 1:33 pm    Post subject: Reply with quote
Looking sweet. Can you send a picture of this lens, and may we use it and an example from the above to showcase the lens on www.DeltaLenses.com? Happy to give you a credit and/or link.
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