Cosina officially released the Voigtlander PORTRAIT HELIAR 75mm f/1.8 lens with various bokeh effects for Sony E-mount (previously reported here):

Various bokeh effects using the control ring: by operating the control ring for undercorrection and overcorrection, you can enjoy bokeh depictions with an unprecedented range.

The suggested retail price is ¥165,000  - around $1,100 (check for pre-order options).

Additional informtion:

Cosina releases the PORTRAIT HELIAR 75mm F1.8, a special replacement lens compatible with full-size mirrorless cameras using the Sony E-mount from the Focto Render brand.

The PORTRAIT HELIAR 75mm F1.8 is a large caliber manual focus medium telephoto lens dedicated to the Sony E-mount, equipped with the first spherical harvest control mechanism as a replacement lens for full size foctrender. Covering a full-size image circle, the optical design optimizes the image sensor for Sony mirrorless cameras.

This lens creates a wide variety of bokeh expressions by paying attention to the relationship between spherical harvestment and bokeh, allowing arbitrarily control over the state of insufficiency (undercollection) and overcompensation (overcollection).
The lens configuration uses a Heliar type of 3 groups of 6 sheets, while the open aperture is achieved a large caliber of F1.8. Changes in spherical harvestment can occur even with the aperture opening and closing, but by manipulating the new mechanism's control ring, you can enjoy the portrayal of bokeh with unseen width.

In the image with insufficient correction, the pint's tendon is obscured (soft focus) and the highlight flare occurs. The lag makes for a soft depiction. On the other hand, in the over-corrected image, the pinto scale remains, and the lag becomes hard (bubble blur). These trends have been regarded as glitches that need to be fixed from an ideal optical design perspective, but they are planned and designed to connect their characteristics to unique photographic expressions.

Variable spherical harvestment can cause optical principle to shift the pint position, but we are responding to this challenge by incorporating a mechanism that can offset the slip by changing the spacing between the lens group in conjunction with the control ring. When you operate the control ring, the finger point has a small protrusion to give you an approximate sense of correction.
This lens has an electronic contact point, which reflects the usage of the lens in the Exif information of the photography data, but does not depend on the functionality of electronic lens optical correction in the camera, but it is designed to capture the performance of the lens itself as an image. Also, since it has a built-in distance encoder, it is also suitable for models with a 5-axis body internal hand break compensation function that uses distance information to the subject for shift blur correction. You can also expand the viewfinder by using the focus ring. The shortest shooting distance is 0.7m, and the pint is dedicated to manual focus.

The metal focus ring uses a diamond pattern with excellent grip strength. One of the features is the silky operation sensation that is greased by a high precision metal helicoid that can withstand the sheer hint of the squeeze and open. The aperture is a mechanical control directly connected to the operating ring. It adjusts on the lens side rather than the camera side command dial. The number of apertures is nine, depicting the out-focus part of the dim light source, etc. in an arranged form.

The product page can be found here.

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