Canon Patents

Patent: Canon RF 35mm f/1.4 Soft Focus

Canon News has uncovered a complex and interesting optical formula patent from Canon, this one is for an RF 35mm f/1.4 Soft Focus lens design.

Canon RF 35mm f/1.4 Soft Focus

  • Focal length: 35.91mm 35.82mm 36.00mm  (normal focus, under and over)
  • F-NUMBER: 1.52 1.52 1.53
  • Half angle of view: 31.07 31.13 31.01
  • Image height: 21.64mm 21.64mm 21.64mm
  • Total lens length: 133.70mm 133.68mm 133.69mm
  • BF: 19.05mm 19.03mm 19.04mm

An RF 35mm f/1.2L has been rumoured for some time, but this is the first we’ve seen of this type of lens.

Del Paso

M3 Singlestroke
Aug 9, 2018
576
545
If most of these lens designs are implemented, it'll be hard for competition to follow!
 

SteveC

M50 & T6i
Sep 3, 2019
379
233
Any lens wide enough to make the nose bigger than the rest of the face. (Or make the portrait dinky against a landscape--which would at least make some doggone sense.)
 
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Antono Refa

EOS 6D MK II
Mar 26, 2014
864
135
The EF 135mm f/2.8 w/Softfocus was discontinued, so apparently the effect isn't in high demand.

Maybe this lens is for video, maybe its just to protect the IP.
 

BeenThere

EOS 6D MK II
Sep 4, 2012
858
187
I prefer sharp focus. Various ways to selectively soften in post. Not so easy to sharpen a soft image in post.
 

SecureGSM

2 x 5D IV
Feb 26, 2017
1,340
322
35mm is a great focal length to shoot portraits with. All my street photos and portraits are shot with a 35mm. https://eddrobertson.com/street-portraits/
1.5 stop loss of light (as with the RF 85 DS) would be a deal breaker for many. with 85mm not so much where DoF / bokeh quality is a primary purpose of going F1.2. With 35mm lens - not so much though. however, I am keen to see what opportunity this lens will provide.
 
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cayenne

EOR R
Mar 28, 2012
1,992
142
Can someone explain to me what a "soft focus" lens is? I'm having a hard time believing this is a lens that is intentionally designed so as not to allow getting as close to tack sharp images as possible, and that it means something else?

If it means that, what is the use case for a lens that is designed not to focus well?

TIA,

cayenne
 

CanonFanBoy

EOS 5D SR
Jan 28, 2015
4,155
1,718
Irving, Texas
Can someone explain to me what a "soft focus" lens is? I'm having a hard time believing this is a lens that is intentionally designed so as not to allow getting as close to tack sharp images as possible, and that it means something else?

If it means that, what is the use case for a lens that is designed not to focus well?

TIA,

cayenne
Yes, intentionally soft. Usually for portraits? I am surprised at this focal length. “A soft focus lens deliberately introduces spherical aberration in order to give the appearance of blurring the image while retaining sharp edges; it is not the same as an out-of-focus image, and the effect cannot be achieved simply by defocusing a sharp lens. Soft focus is also the name of the style of photograph produced by such a lens.” Wiki

Years ago there was a franchise called “Glamor Shots”. They took a lot of soft focus style photos.
 
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