TTartisan 7.5mm f2.0 L mount, cheap and good

My first impression about TTartisan 7,5mm f2 Fisheye Lens after a few spherical panoramas, excellent value for money, high- quality technical design.
 

• Normal fisheye lenses are combined with a maximum aperture of F/2.8 by default, but the TTartisan fisheye lens comes with an aperture of F2, which supports working in difficult lighting conditions with more light, especially when taking pictures of the starry sky.

• A customized ND1000 rear filter is included.  This ND1000 filter provides 10-stop exposure reduction across the entire image, allowing for a larger aperture or slower shutter speed than would normally be required.  Slowing down the shutter speed can convey movement more clearly, while adjusting the aperture allows more creative control over the depth of field.  These skills are very useful when shooting landscapes, especially in bright sunshine.

• Polar Fisheye Shooting: Although this lens was designed for APS-C sensors, full-frame users can also use it to shoot circular fisheye shots.

• Panorama 360°/180° shots can be taken on full-frame cameras DC-S1R and DC S1 with 5 shots each in excellent image quality.  In the PTgui software, the fisheye recordings are straightened and aligned completely automatically.

• Landscape Photography TTArtisan 7.5mm F2.0 Camera Lens The ultra wide angle lens helps you capture more scenery.  The TTArtisan 7.5mm f2.0 fisheye lens offers a 180° angle of view to produce clear visual appeal, characterized by dramatic distortions and a creative depiction of space.

• Time-lapse photography and close-ups with fisheye lens, an ND1000 filter is included in the scope of delivery.  The screw filter is installed at the end of the lens.  This allows time-lapse photos to be taken with longer exposure times.  The minimum lens distance is about 15mm for close-up photography.

• The image sharpness over the entire front lens is very good, the manual focus moves the inner tube about 1.6mm forward.

• The built-in lens hood is designed in such a way that no angle of view is lost when using full-frame cameras.  Since TTartisan has really come up with something positive.

• Incorrect specification of the focal length: The 7.5mm focal length specified by TTartisan is probably not entirely correct. When the images taken with this lens are transferred to the panorama program PTgui (Profi software), an effective focal length of 10.3mm is used to compensate for the distortion determined.