- Canon EF-Mount Lens/Full-Frame Format
- Aperture Range: f/2 (T3.2) to f/22
- One Apodization Element for Smooth Bokeh
- Three Low Dispersion Elements
- One Extra Refractive Index Element
- Manual Focus and Manual Aperture Ring
- Dual Diaphragms: 8- and 14-Blades
Photographer and reviewer Dustin Abbott posted the full review of the Laowa STF 105mm f/2 (T3.2) lens. We featured his first impression last week. The manual focusing Laowa STF (Smooth Trans Focus) 105mm f/2 (T3.2) is made by Venus Optics and was announced back in March 2016. It’s currently available for pre-order at $699 (B&H Photo | Adorama).
The 18 minutes video below is the full review, which can also be read on Dustin Abbott’s site.
In the conclusion he writes:
Some lenses are safe and easy, while some are higher risk/higher reward. The reward from the Loawa STF (Smooth Trans Focus) 105mm f/2 (T3.2) is the ability to create beautiful images from a lens with a very nice resolution-to-bokeh ratio. Laowa refers to this lens as the “bokeh dreamer”, and while I don’t know how much the lens has influenced my dreams, I can certainly verify that it produces soft, beautiful bokeh that lacks hard edges (particularly in the background). This is a great portrait focal length on full frame, and you have the ability to produce very nice portraits with the lens with a little more flexibility in controlling aperture and depth of field. The focal length is good for a number of things, including landscape shooting. The lens also sports a very nice quality build that punches well above its price point. It is worth noting that the two alternatives to this lens on the market (Fujifilm 56mm f/1.2 and Sony 135mm f/2.8) are both nearly twice as much as the $699 asking price of the Laowa, so if you’ve wanted to experiment with an APD/STF lens, this is definitely the lowest cost of entry. Read the review…
You may also be interested in what Dustin Abbott thinks about build quality and handling of the Laowa 105mm f/2.
A Canon patent for a 70-200mm F2.8 DO (Diffractive Optics) lens. The patent was spotted by Egami, and they suggest this lens could hit the market before 2020, as replacement for the Canon EF 70-200 F2.8L IS.
It’s also suggested that this lens is 8K ready, i.e. ready to work with an 8K DSLR.
- Patent Publication No. 2016-80877
- Published 2016.5.16
- Filing date 2014.10.17
- Example 1
- Zoom ratio 2.69
- Focal length 72.15 134.00 193.98
- F-number 2.91 2.91 2.91
- Angle of view 16.69 9.17 6.36
- Image height 21.64
- The total lens length 223.50 223.50 223.50
- BF 45.35 45.35 45.35
-  Conventional full high definition (number of pixels 1920 × 1080, pixel size number .mu.m) If image quality equivalent was sufficient in the conventional example as described in patent documents mentioned above. However, Super Hi-Vision (the number of pixels 8000 × 4000, pixel size 1μm before and after) for the future sought image quality, such as, is not sufficient in the imaging performance of conventional zoom lens. Therefore, further improvement of performance (in particular, reduction of the chromatic aberration amount) is required.
- Canon patent
- DOE ( diffractive optical element )
- Inner zoom (Examples 2 and 3)
- Inner focus
- Floating (Examples 1, 4)
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This could be a very cool lens, if the optical formula described in this Canon patent will ever go into production. Canon filed a patent for a 11mm F4L USM lens. The optical formula appears to refer to a relatively small lens with good control of optical distortions.
- Patent Publication No. 2016-81005
- Published 2016.5.16
- Filing date 2014.10.22
- Focal length 11.33 11.47
- F-number 4.11 4.12
- Half angle of 62.36 62.08
- Image height 21.64 21.64
- Overall length of the lens 109.13 109.12
- BF 38.90 38.40
- However, even in the little lens distortion, by the emphasis of perspective, it may appear to be distorted photographic image. Furthermore, suitable amount of distortion varies depending on the subject and the composition to be photographed. For this reason, it is required that the distortion in the variable.
- Canon patent
- It is less distortion in the normal state
- A large distortion in the distortion change state